anchor seal assembly and method of creating a seal and anchor between a first tubular section and a

专利摘要:
ANCHORAGE SEAL SET, METHOD OF CREATING A SEAL AND ANCHORAGE, METHOD OF CREATING A SEAL BETWEEN A FIRST TUBULAR SECTION AND A SECOND TUBULAR SECTION, WELL BACKGROUND TOOL The present invention generally relates to an anchoring fence for an expandable tubular assembly. In one aspect, an anchoring seal assembly for creating a sealing portion and an anchoring portion between a first tubular section which is arranged within a second tubular section is provided. The anchor seal assembly includes an expandable annular member attached to the first tubular section. The annular member has an outer surface and an inner surface. The anchoring seal assembly additionally includes a sealing member arranged in a groove formed on the outer surface of the expandable annular member. The sealing member has one or more anti-extrusion spring strips embedded within the sealing member, wherein the outer surface of the expandable annular member adjacent to the groove includes a rough surface. The anchor seal assembly also includes an expansion sleeve that is configured to radially expand the expandable annular member to create a seal portion (...).
公开号:BR112013020850B1
申请号:R112013020850-3
申请日:2012-02-16
公开日:2021-03-02
发明作者:Rocky A. Turley；Georg Givens；Brent J. Lirette；Huy V. Le
申请人:Weatherford Technology Holdings Llc；
IPC主号:

专利说明:

Cross Reference to Related Orders
The present application claims the benefits of US provisional patent application Serial No. 61 / 563,016 filed on November 22, 2011 and US patent application Serial No. 13 / 029,022, filed February 16, 2011. Each of the applications of the aforementioned patents is hereby incorporated by reference. Field of the Invention
Modalities of the present invention generally refer to well expansion assemblies. More particularly, embodiments of the present invention relate to seals for well expansion assemblies. Description of the Related Art
In the oilfield industry, downhole tools are used in the well bore at different stages of well operation. For example, an expandable liner hanger can be employed during the well formation stage. After the first casing column is fitted into the well bore, the well is drilled to a designated depth and a casing assembly is driven into the well at a depth with which the upper portion of the casing assembly is overlapping the lower portion. of the first coating column. The liner assembly is attached to the well bore by expanding a liner hanger within the surrounding liner and then cementing the liner assembly into the well. The coating hanger includes sealing members arranged on an external surface of the coating hanger. The sealing members are configured to create a seal with the surrounding coating with the expansion of the coating hanger.
In another example, a packer can be employed during the production stage of the well. The packer typically includes a packer set with sealing members. The packer can seal a ring formed between the production tube disposed within the casing of the well bore. Alternatively, some packers seal a ring between the side of an external tubular and an uncoated well hole. The routine use of packers includes coating protection from pressure, not only from the well, but also from stimulation pressures, and protection of the well hole coating from corrosive fluids. Packers can also be used to retain high pressure fluids or treatment fluids in the investment ring.
Both the liner hanger and the packer include sealing members that are configured to create a seal with the surrounding liner or an uncoated well hole. Each sealing member is typically arranged in a groove (or gasket compressor) formed in an expandable tubular assembly of the coating hanger or packer. However, the sealing member can extrude out of the groove during expansion of the expandable tubular assembly due to the characteristics of the sealing member. In addition, the sealing member can extrude out of the groove after the expansion of the expandable tubular assembly due to pressure differentials applied to the sealing member. Therefore, there is a need for extrusion-resistant seals for use with an expandable tubular assembly. Summary of the Invention
The present invention generally relates to an anchorage seal for an expandable tubular assembly. In one aspect, an anchoring seal assembly for creating a sealing portion and an anchoring portion between a first tubular section which is arranged within a second tubular section is provided. The anchor seal assembly includes an expandable annular member attached to the first tubular section. The annular member has an outer surface and an inner surface. The anchoring seal assembly additionally includes a sealing member arranged in a groove formed on the outer surface of the expandable annular member. The sealing member has one or more anti-extrusion spring strips embedded within the sealing member, wherein the outer surface of the expandable annular member adjacent to the groove includes a rough surface. The anchor seal assembly also includes an expansion sleeve having an inclined outer surface and an inner hole. The expansion sleeve is movable between a first position in which the expansion sleeve is arranged outside the expandable annular member and a second position in which the expansion sleeve is arranged inside the expandable annular member, in which the expansion sleeve is configured to radially expand the expandable annular member in contact with an inner wall of the second tubular section to create a sealing portion and an anchoring portion as the expansion sleeve moves from the first position to the second position.
In another aspect, a method of creating a sealing portion and an anchoring portion between a first tubular section and a second tubular section is provided. The method includes the step of placing the first tubular section within the second tubular section. The first tubular section has an annular member with a groove and a rough external surface, in which a sealing member with at least one anti-extrusion strip is disposed within the groove and in which a space is formed between one side of the sealing member and one side of the groove. The method additionally includes the step of expanding the annular member radially outwardly, which causes the at least one anti-extrusion strip to move towards an interface area between the first tubular section and the second tubular section. The method also includes the step of launching the annular member into contact with an inner wall of the second tubular section to create a sealing portion and an anchoring portion between the first tubular section and the second tubular section.
In another aspect, a seal assembly for creating a seal between a first tubular section and a second tubular section is provided. A sealing assembly includes an annular member attached to the first tubular section, the annular member having a groove formed on an external surface of the annular member. A sealing assembly additionally includes a sealing member disposed in the groove, the sealing member having one or more anti-extrusion strips. The sealing member is configured to be radially expandable outwardly in contact with an inner wall of the second tubular section by applying an outwardly directed force provided to an inner surface of the annular member. In addition, a seal assembly includes a defined space between the seal member and one side of the groove.
In another aspect, a method of creating a seal between a first tubular section and a second tubular section is provided. The method includes the step of positioning the first tubular section within the second tubular section, the first tubular section having an annular member with a groove, in which a sealing member with at least one anti-extrusion strip is disposed within the groove and in which a space is formed between one side of the sealing member and one side of the groove. The method additionally includes the step of expanding the annular member radially outward, which causes the first anti-extrusion band and the second anti-extrusion band to move towards the first interface area and a second interface area between the annular member and the second tubular section. The method also includes the step of launching the sealing member in contact with an inner wall of the second tubular section to create the seal between the first tubular section and the second tubular section.
In yet another aspect, a seal assembly for creating a seal between a first tubular section and a second tubular section is provided. A seal assembly includes an annular member attached to the first tubular section, the annular member having a groove formed on an external surface thereof. A sealing assembly additionally includes a sealing member disposed in the groove of the annular member so that one side of the sealing member is spaced from one side of the groove, the sealing member having one or more anti-extrusion strips, wherein one or more anti-extrusion strips move towards an interface area between the annular member and the second tubular section with the expansion of the annular member.
In a further aspect, a suspension assembly is provided. The suspension assembly includes an expandable annular member having an outer surface and an inner surface. The suspension assembly additionally includes a sealing member arranged in a groove formed on the outer surface of the expandable annular member, the sealing member having one or more anti-extrusion spring strips embedded within the sealing member. The suspension assembly also includes an expansion sleeve having an inclined outer surface and an internal orifice. The expansion sleeve is movable between a first position in which the expansion sleeve is arranged outside the expandable annular member and a second position in which the expansion sleeve is arranged inside the expandable annular member. The expansion sleeve is configured to radially expand the expandable annular member as the expansion sleeve moves from the first position to the second position.
In an additional aspect, a downhole tool for use in a borehole is provided. The tool includes a body having a hole. The tool additionally includes a seal assembly attached to the body. A sealing assembly having an expandable annular member, a sealing member and an expansion sleeve, wherein the sealing member includes one or more anti-extrusion spring strips embedded within the sealing member. The tool additionally includes a set of wedges attached to the body. The wedge set includes wedges that are configured to engage the well bore.
In an additional aspect, a downhole tool for use in a borehole is provided. The tool includes a tubular having an inclined outer surface. The tool additionally includes an expandable annular member disposed in the tubular. The expandable member has an anchoring portion. The tool additionally includes a sealing member arranged in a groove in the expandable annular member. The sealing member has one or more anti-extrusion strips, in which the sealing member and the anchoring portion are configured to be radially expandable in contact with the well bore as the expandable annular member moves along the surface sloping outer tubular. Brief Description of Drawings
In a way in which the characteristics mentioned above can be understood in detail, a more particular description of the present invention, briefly summarized above, can be by reference to the modalities, some of which are illustrated in the attached drawings. It should be noted, however, that the attached drawings illustrate only typical modalities of the present invention and, therefore, should not be considered limiting its scope, the present invention can admit other equally effective modalities. The patent or order file contains at least one drawing executed in color. Copies of this patent or patent application with drawing (s) in color will be provided by the office upon request and payment of the necessary fee.
Figure 1 illustrates a view of an expandable hanger in an insertion position (not positioned).
Figure 2 shows a view of an expandable hanger seal assembly.
Figure 3 shows a view of a seal assembly during expansion of the expandable hanger.
Figures 4A and 4B illustrate a view of a seal assembly after expansion of the expandable hanger.
Figure 5 illustrates an enlarged view of a seal assembly before expansion.
Figure 6 illustrates an enlarged view of a seal assembly after expansion.
Figures 7-10 illustrate views of different modalities of a seal assembly.
Figure 11 illustrates a view of the downhole tool in a well.
Figure 12 illustrates a view of the downhole tool in an insertion position.
Figure 13 illustrates an enlarged view of a gasket element in the downhole tool.
Figure 14 illustrates a view of the downhole tool in an expanded and operating position.
Figure 15 illustrates an enlarged view of the gasket element in the downhole tool.
Figure 16 illustrates a view of a suspension assembly in an unpositioned position.
Figure 17 illustrates a view of the suspension assembly in a positioned position.
Figure 18 illustrates a view of an installation tool used during a dry seal tensile stretching operation.
Figure 19 shows a view of a loading tool with an o-ring.
Figure 20 illustrates a view of the loading tool on the expandable hanger.
Figure 21 illustrates a view of a drive plate launching a seal ring into an expandable suspension gasket compressor.
Figures 22 and 22A illustrate views of a gasket removal stage tool.
Figures 23, 23A and 23B illustrate the activation of the wedges in the stage tool.
Figures 24, 24A and 24B illustrate the activation of a gasket element in the stage tool.
Figures 25, 25A and 25B illustrate the movement of an external sleeve on the stage tool.
Figures 26 and 26A illustrate the closing of doors on the stage tool after the cementing operation is complete.
Figures 27 and 27A illustrate views of the downhole tool in an insertion position (not positioned).
Figures 28 and 28A illustrate the positioning of the wedges in the well-bottom tool.
Figures 29 and 29A illustrate the positioning of a gasket element in the downhole tool
Figures 30 and 30A illustrate views of the downhole tool in an insertion position (not positioned).
Figures 31 and 31A illustrate the downhole tool in an insertion position (not positioned).
Figures 32 and 32A illustrate the downhole tool in a positioned position. Detailed Description
The present invention generally relates to extrusion-resistant seals for a downhole tool. Extrusion-resistant seals will be described here in relation to a coating hanger in figures 1-10, a packer in figures 11-15 and a suspension assembly in figures 16-17. It should be understood, however, that extrusion-resistant seals can also be used with other downhole tools without deviating from the principles of the present invention. In addition, extrusion-resistant seals can be used in the downhole tool that is disposed inside a coated well hole or inside an open well hole. In order to better understand the novelty of the extrusion-resistant seals of the present invention and the methods of using them, reference is made hereinafter to the attached drawings.
Figure 1 illustrates a view of an expandable hanger 100 in an insertion position (not positioned). In the completion stage shown in figure 1, a hole in well 65 was coated with coating column 60. Subsequently, a subsequent coating assembly 110 is positioned near the lower end of coating 60. Typically, coating assembly 110 is lowered inside the borehole of the well 65 by a laying tool arranged at the bottom end of a working column 70.
The coating assembly 110 includes a tubular 165 and the expandable hanger 100 of the present invention. The hanger 100 is an annular member that is used to secure or lock the tubular 165 from an inner wall of the liner 60. The expandable hanger 100 includes a plurality of seal assemblies 150 disposed on the outer surface of the hanger 100. The plurality of seal assemblies 150 are circumferentially spaced around the hanger 100 to create a seal between the liner assembly 110 and the liner 60 with the expansion of the hanger 100. Although the hanger 100 in figure 1 shows four seal assemblies 150, any number of seal assemblies 150 can be attached to a liner assembly 110 without deviating from the principles of the present invention.
Figure 2 shows an enlarged view of the seal assemblies 150 in the insertion position. For clarity, the well bore 65 is not shown in figures 2-6. Each seal assembly 150 includes a seal ring 135 disposed in a gasket compressor 140. Gasket compressor 140 includes a first side 140A, a second side 140B and a third side 140C. In the embodiment shown in figure 2, a bonding material, such as glue (or other fastening means), can be used on sides 140B, 140C during the manufacturing stage of a seal assembly 150 to attach a seal ring 135 to the gasket compressor 140. Connecting a gasket 135 to gasket compressor 140 is useful to prevent a gasket 135 from becoming unstable and having a piston effect when the hanger 100 is positioned on the liner 60 and before the expansion of the hanger 100 In one embodiment, side 140A has an angle α (see figure 5) of approximately 100 degrees before expansion, and side 140A has an angle β (see figure 6) between about 94 degrees and about 98 degrees after expansion of a seal assembly 150.
As shown in figure 5, a volume gap 145 is created between a seal ring 135 and the side 140A of the gasket compressor 140. In general, volume gap 145 is used to substantially prevent distortion of a seal ring 135 with the expansion of the hanger 100.
Volume space 145 is a free space (void, gap or hollow space) between the seal ring portion 135 and the gasket compressor portion 140 before the expansion of the hanger 100. In other words, during the manufacturing process of the hanger, volume space 145 is created by positioning a seal ring 135 within the gasket compressor 140 so that a seal ring 135 is spaced from at least one side of the gasket compressor 140. Although the volume 145 in figure 5 is created by having a gasket compressor side 140 at an angle, volume space 145 can be created in any configuration (see figures 7-10, for example) without deviating from the principles of the present invention . Additionally, the size of the volume space 145 can vary depending on the configuration of the gasket compressor 140. In one embodiment, the gasket compressor 140 has 3-5% more volume due to the volume space 145 than a standard gasket compressor without a volume space.
Referring back to Figure 2, a seal ring 135 includes one or more anti-extrusion strips, such as the first seal strip 155 (first anti-extrusion strip) and a second seal strip 160 (second anti-extrusion strip). As shown, sealing strips 155, 160 are embedded in a sealing ring 135 in an upper corner on each side of a sealing ring 135. In one embodiment, sealing strips 155, 160 are arranged on an outer circumference of a sealing ring 135. In another embodiment, the sealing strips 155, 160 are springs. Sealing strips 155, 160 can be used to limit the extrusion of a sealing ring 135 during expansion of a sealing assembly 150. Sealing strips 155, 160 can also be used to limit the extrusion of the pressure differential applied after expansion of a seal assembly 150.
Figure 3 shows a view of the seal assemblies 150 during expansion and figures 4A and 4B illustrate the seal assemblies 150 after expansion. As shown, an axially mobile expansion tool 175 contacts an inner surface 180 of the casing assembly 110. Expansion tools are well known in the art and are generally used to radially enlarge an expandable tubular by launching the expansion tool. expansion 175 axially through the tubular, thereby molaring the tubular wall radially outward as the larger diameter tool is forced through the smaller diameter tubular member. Expansion tool 175 can be attached to the threaded mandrel that is rotated to move expansion tool 175 axially across the hanger 100 and expand the hanger 100 out in contact with the liner 60. It should be understood, however, that other means can be employed to launch the expansion tool 175 through the hanger 100 such as hydraulics or any other means known in the art. In addition, the expansion tool 175 can be arranged on the hanger 100 in any orientation, such as in a downward orientation as shown for a top-down expansion or in an upward orientation for a bottom-up expansion. Additionally, an expandable rotary tool (not shown) can be employed. The rotatable expandable tool moves between a smaller first diameter and a larger second diameter, thereby allowing not only top-to-bottom expansion, but also bottom-to-top expansion depending on the directional axial movement of the rotary expandable tool.
As shown in figure 3, the expansion tool 175 has expanded the portion of the hanger 100 towards the liner 60. During the expansion of the hanger 100, a seal ring 135 moves in contact with the liner 60 to create a seal between the hanger 100 and the liner 60. As a seal ring 135 contacts the liner 60, a seal ring 135 changes the configuration and occupies the portion of the volume space 145. In the embodiment shown, the volume space 145 is located on the side of a seal assembly 150 which is the first portion to be expanded by the expansion tool 175. The location of volume space 145 in a seal assembly 150 allows a seal ring 135 to change position (or reconfigure) inside the gasket compressor 140 during the expansion operation. In addition, the volume of the volume space 145 may change during the expansion operation. As shown in figure 4B, the expansion tool 175 is removed from the hanger 100 after the hanger 100 is expanded in contact with the liner 60.
A seal ring 135 changes the configuration during the expansion operation. As shown in figure 5, a seal ring 135 has a volume that is represented by the reference number 190. Before expansion, the volume portion 190 of a seal ring 135 is positioned inside the gasket compressor 140 and another portion of the volume 190 of a seal ring 135 extends outside the gasket compressor 140 (ahead of line 195). After expansion, volume 190 of a seal ring 135 is repositioned so that a seal ring 135 moves into volume space 145 as shown in figure 6. In other words, volume 190 of a seal ring 135 is substantially the same before the expansion and after the expansion. However, the volume of a seal ring 135 inside the gasket compressor 140 increases after the expansion operation due to the portion of volume 190 of a seal ring 135 that was outside the gasket compressor 140 (in addition to line 195) having moved into the gasket compressor 140 (compare figures 5 and 6). Thus, the volume 190 of a seal ring 135 is substantially within the gasket compressor 140 after the expansion operation. In an alternative embodiment, a seal ring 135 does not extend outside the gasket compressor 140 (in addition to line 195) prior to expansion. The volume 190 of a seal ring 135 is repositioned during the expansion operation so that a seal ring 135 moves into the volume space 145. The volume 190 of a seal ring 135 is substantially the same before expansion and after expansion. In this way, a seal ring 135 changes configuration during the expansion operation and occupies (or closes) the volume space 145.
The volume of the gasket compressor 140 and / or the volume space 145 may decrease as a seal assembly 150 is expanded radially outward during the expansion operation. As determined here, the angle α (figure 5) decreases to the angle β (figure 6), which causes the size of the volume space 145 to decrease. The height of the gasket compressor 140 can also become smaller, which causes the volume of the gasket compressor 140 to decrease. As such, the combination of the change in configuration of a seal ring 135 and the change of volume setting of the gasket compressor 140 (and / or the volume space 145) allows a seal ring 135 to create a seal with the liner. 60. In one embodiment, the volume of the gasket compressor 140 (including volume space 145) after the expansion operation can be substantially the same as the volume 190 of a seal ring 135. In another embodiment, the volume of the compressor gasket 140 (including volume space 145) after the expansion operation may be equal to volume 190 of a seal ring 135 or may be greater than volume 190 of a seal ring 135.
As shown in figure 6, the sealing strips 155, 160 on a sealing ring 135 are launched towards an interface 185 between a sealing assembly 150 and the liner 60 during the expansion operation. The volume space 145 allows a sealing ring 135 to move into the gasket compressor 140 and to position the sealing strips 155, 160 in a location close to the interface 185. In that position, the sealing strips 155, 160 substantially avoid extruding a seal ring 135 ahead of interface 185. In other words, sealing strips 155, 160 expand radially outward with the hanger 100 and block the elastomeric material of a seal ring 135 from flowing through interface 185 between a seal assembly 150 and the liner 60. In one embodiment, the sealing strips 155, 160 are springs, such as toroidal spiral springs, which expand radially outward due to the expansion of the hanger 100. As the spring expands radially outward, the spring coils act as a barrier to the flow of elastomeric material from a sealing ring 135. In this way, sealing strips 155, 160 on a sealing ring 135 act as a device anti-extrusion or an extrusion barrier.
There are several benefits of the extrusion barrier created by the sealing strips 155, 160. One benefit of the extrusion barrier would be that the outer surface of a sealing ring 135 in contact with the liner 60 is limited to a region between the sealing strips 155 , 160, which allows a high pressure seal to be created between a seal assembly 150 and liner 60. In one embodiment, a seal assembly 150 can create the high pressure seal in the (12,000 to 14,000 psi) range. An additional benefit of the extrusion barrier would be that a seal assembly 150 is capable of creating a seal with a surrounding coating that can have a range of internal diameters due to API tolerances. Another benefit would be that the extrusion barrier created by the sealing strips 155, 160 can prevent erosion of a seal ring 135 after the hanger 100 is expanded. The erosion of a seal ring 135 can eventually lead to a poor function of a seal assembly 150. An additional benefit is that the sealing strips 155, 160 act as an extrusion barrier after expansion of the expandable hanger 100. More specifically , the extrusion barrier created by the sealing strips 155, 160 can prevent the extrusion of a sealing ring 135 when the space between the expandable hanger 100 and the liner 60 is increased due to the bottom pressure of the well. In other words, sealing strips 155, 160 connect the space, and the liquid extrusion space between the windings of sealing strips 155, 160 grows considerably less compared to an annular space that is formed when a sealing ring does not include the sealing strips. For example, the annular space (without sealing strips) can be of the order of (0.030 ") radial compared to the liquid extrusion space between the sealing strip windings 155, 160 which can be of the order of 0.001 / 0.003") .
Figures 7-10 illustrate views of different modalities of a seal assembly. For convenience, components in a seal assembly in figures 7-10 that are similar to components in a seal assembly 150 will be marked with the same indicator number. Figure 7 illustrates a view of a seal assembly 205 that includes the volume gap 145 in the lower portion of a seal assembly 205. As shown, the volume gap 145 is between side 140C and a seal ring 135. In this embodiment , a bonding material, such as glue, can be applied to the sides 140A, 140B during the manufacturing stage of a sealing assembly 205 to secure a sealing ring 135 to the gasket compressor 140. Similar to other embodiments, a sealing ring seal 135 will be reconfigured and occupies at least the portion of volume space 145 with the expansion of a seal assembly 205.
Figure 8 illustrates a view of a seal assembly 220 that includes the volume gap 145 in the lower portion and an upper portion of a seal assembly 220. As shown, a first volume gap 145A is between side 140A and a ring seal 135 and a second volume space 145B is between side 140C and a seal ring 135. A first volume space 145A and the second volume space 145B can be the same or different. In this embodiment, the bonding material can be applied to side 140B during the manufacturing stage of a seal assembly 220 to attach a seal ring 135 to the packing compressor 140. Similar to other modalities, a seal ring 135 will be reconfigured and occupies at least the portion of the first volume space 145A and at least the portion of the second volume space 145B with the expansion of a seal assembly 220.
Figure 9 illustrates a view of a seal assembly 240 that includes volume space 145 with an inclining member 245. As shown, side 140A of gasket compressor 140 is perpendicular to side 140B. Inclination member 245, such as a pressure washer or crushing ring, is arranged in the volume space 145 between side 140A and a sealing ring 135. Inclination member 245 can be used to maintain the position of a sealing ring 135 on the gasket compressor 140. In addition to sealing strip 160, sloping member 245 can also act as an extrusion barrier with the expansion of a sealing assembly 240. During the expansion operation, a sealing ring 135 will be reconfigured on the gasket compressor 140 and compresses the tilt member 245. Additionally, in this embodiment, the connection material can be used on the sides 140B, 140C during the manufacturing stage of a seal assembly 240 to fix a seal ring 135 on the gasket compressor 140.
Figure 10 illustrates a view of a seal assembly 260 that includes a volume space 270 in the portion of a seal ring 265. In this embodiment, the bonding material can be used on sides 140A, 140B, 140C during the manufacturing stage of a seal assembly 260 to attach a seal ring 265 to the gasket compressor 140. Similar to other embodiments, a seal ring 265 will be reconfigured with the expansion of a seal assembly 260. However, in this embodiment, the volume space 270 in the portion of a seal ring 265 will be closed or reduced in size when a seal ring 265 is launched in contact with the surrounding liner. In another embodiment, a seal ring 265 may include seal bands (not shown) embedded in a seal ring 265 similar to seal bands 155, 160. In an additional embodiment, an equalizing vent (not shown) can be formed on a seal ring 265 to provide communication between volume space 270 and an outer portion of a seal ring 265. Equalizing ventilation can be used to prevent collapse of a seal ring 265 due to hydrostatic pressure exposure .
Figure 11 illustrates a view of a typical underground hydrocarbon well 90 that defines a vertical well 25 hole. Well 90 has multiple hydrocarbon-containing formations, such as oil-containing formation 45 and / or gas-containing formations (not shown). After the well hole 25 is formed and coated with coating 10, a tube column 50 is driven into an opening 15 formed by the coating 10 to provide a path for hydrocarbons to the surface of well 90. Hydrocarbons can be recovered by forming perforations 30 in formations 45 to allow hydrocarbons to enter the opening of the liner 15. In the illustrative embodiment, perforations 30 are formed by operating a drilling gun 40, which is a component of the tube column 50. The drilling gun 40 is used to drill the liner 10 to allow hydrocarbons captured in formations 45 to flow to the surface of well 90.
The tube column 50 also carries the downhole tool 300, such as the packer, a bridge plug or any other downhole tool used to seal a desired location in a well hole. Although generally shown as a unique element, the downhole tool 300 can be a set of components. In general, the downhole tool 300 can be operated by hydraulic or mechanical means and is used to form a seal at a desired location in the well hole 25. The downhole tool 300 can seal, for example, a space annular 20 formed between a production pipe 50 and the casing of the well bore 106. Alternatively, the borehole tool 300 may seal an annular space between an external tubular and an uncoated well bore. Common uses of the downhole tool 300 include protecting the liner 10 from pressure and corrosive fluids; insulation from coating leaks, high pressure perforations, or multiple production intervals; and retention of treatment fluids, heavy fluids or high pressure fluids. However, said uses for the downhole tool 300 are for illustrative purposes only, and the application of the downhole tool 300 is not limited to just those uses. The downhole tool 300 can also be used with a conventional coating hanger (not shown) in a coating assembly. Typically, the well bottom tool 300 would be positioned in the coating assembly next to the conventional coating hanger. In one embodiment, the bottom well assembly tool is positioned above the conventional coating hanger. After the conventional casing hanger is fitted into the casing of the well hole, the cementing operation can be carried out to fix the casing within the casing hole. Thereafter, the downhole tool 300 can be activated to seal an annular space formed between the casing assembly and the casing of the borehole.
Figure 12 illustrates the well bottom tool 300 in an insertion position (not positioned). As shown in figure 12, the tube column 50 includes a mandrel 305 that defines an internal diameter of the illustrated portion of the tube column 50. A drive sleeve 335 is slidably arranged over at least a portion of the mandrel 305. The mandrel 305 and the drive sleeve 335 define an interface sealed by the provision of an "O" ring (not shown) carried on an outside diameter of the mandrel 305. An end end of the drive sleeve 335 is supported against a wedge member 325. The wedge member 325 is generally cylindrical and slidably arranged over mandrel 305. An "O" ring seal 310 is arranged between mandrel 305 and wedge member 325 to form a sealed interface between them. The seal 310 is carried on an internal surface of the wedge member 325; however, seal 310 can also be carried on an external surface of mandrel 305. In one embodiment, seal 310 includes sealing strips (i.e., anti-extrusion strips) in a manner similar to that of sealing element 450A-B. In addition, a volume space can be defined between seal 310 and the wedge member portion 325 in a similar manner to volume space 470A-B.
The well-bottom tool 300 includes a locking mechanism that allows the wedge member 325 to travel in one direction and prevents it from traveling in the opposite direction. In one embodiment, the locking mechanism is implemented as a ratchet ring 380 disposed on a ratchet surface 385 of mandrel 305. Ratchet ring 380 is lowered into, and carried by, wedge member 325. In this case, the ratchet ring interface 380 and ratchet surface 385 allow wedge member 325 to travel only in the direction of arrow 315.
The portion of the wedge member 325 forms an external inclined surface 375. In operation, the inclined surface 375 forms an inclined sliding surface for a gasket element 400. Therefore, the wedge member 325 is shown disposed between mandrel 305 and the gasket element 400, where the gasket element 400 is arranged on the inclined surface 375. In the illustrated insertion position, the gasket element 400 is located at the tip of the wedge member 325, the tip defining a relatively smaller outside diameter with respect to to the other end of the sloping surface 375.
The gasket element 400 is held in place by a retaining sleeve 320. The gasket element 400 can be coupled to the retaining sleeve 320 by a variety of locking interfaces. In one embodiment, the retaining sleeve 320 includes a plurality of pincer fingers 355. The terminal ends of the pincer fingers 355 are interlocked with an annular edge 405 of the packing element 400. The pincer fingers 355 can be oriented in one direction radial. For example, it is envisaged that the clamp fingers 355 have radial orientation outwardly throwing the clamp fingers 355 to an inclined or straighter position. However, in this case the clamp fingers 355 do not provide sufficient force to promote the expansion of the gasket element 400.
The downhole tool 300 includes a self-adjusting locking mechanism that allows the retaining sleeve 320 to travel in one direction and avoid traffic in the opposite direction. The locking mechanism is implemented as a ratchet ring 390 disposed on the ratchet surface 395 of the mandrel 305. The ratchet ring 390 is lowered into, and carried by, the retaining sleeve 320. In this case, the ring interface ratchet 390 and ratchet surface 395 allows the retaining sleeve 320 to move only in the direction of arrow 330, with respect to mandrel 305. As will be described in more detail below, the self-adjusting locking mechanism ensures that a seal enough to be maintained by the gasket element 400 despite the counter-forces acting to subvert the integrity of the seal.
In operation, the downhole tool 300 is driven into a well hole in the insertion position shown in figure 12. To adjust the downhole tool 300, the drive sleeve 335 is driven axially in the direction of arrow 315. The axial movement of the drive sleeve 335 can be caused by, for example, mechanical force applied from the weight of the tube column or hydraulic pressure acting on a piston. The drive sleeve 335, in turn, engages the wedge member 325 and drives the wedge member 325 axially along the outer surface of the chuck 305. The ratchet ring 380 and the hollow surface 385 ensure that the member wedge 325 travel only in the direction of arrow 315. With the continuation of the path over mandrel 305, wedge member 325 is operated under the gasket element 400. The gasket element 400 is prevented from moving in relation to the gasket member wedge 325 by the ratchet ring provision 390 and the ratchet surface 395. As a result, the gasket element 400 is forced to slide over the inclined surface 375. The positive inclination of the inclined surface 375 throws the gasket element 400 into a position diametrically expanded. The positioned position of the downhole tool 300 is shown in figure 14. In the positioned position, the gasket element 400 rests on the upper end of the inclined surface 375 and is launched in contact with the liner 10 to form a fluid-tight seal that it is formed in part by a metal-to-elastomer seal and a metal-to-metal contact. More generally, the metal can be any non-elastomer.
In the positioned position, the gripper fingers 355 are angled radially outward but remain interlocked with the edge 405 formed in the gasket element 400. Said coupling ties the position of the retaining sleeve 320 and ratchet ring 390 to the axial position of the element. gasket 400. This allows the gasket element 400 to move wedge member 325 upwards in response to increased pressure from below, maintaining its hermetic interface with the inner diameter of the liner, but prevents relative movement of the gasket element 400 in the opposite direction (shown by arrow 315). Pressure from below the well bottom tool 300 can act to decrease the integrity of the seal formed by the gasket element 400 since the interface of the gasket element 400 with the liner 10 and the wedge member 325 will loosen due to the pressure that makes the coating 10 swollen and in the same way that it acts to collapse the wedge member 325 from below the gasket element 400. A modality of the well-bottom tool 300 neutralizes the referred undesirable effect by the provision of the self-adjusting locking mechanism implemented by the ratchet ring 390 and the surface 395. In particular, the retaining sleeve 320 is allowed to move the mandrel 305 in the direction of the arrow 330 in response to a motivating force acting on the gasket element 400, as shown in figure 15. However, the locking mechanism prevents the retaining sleeve 320 from traveling in the opposite direction (that is, in the direction of arrow 315), thereby ensuring that the seal does not move with respect to liner 10 when pressure is acting from above, thus reducing wear on gasket element 400.
Figure 13 shows an enlarged view of the gasket element 400 in the unpositioned position. As such, the gasket element 400 is at the diametrically smaller end of the inclined surface 375. The gasket element 400 includes a tubular body 440 which is an annular member. The tubular body 440 includes a substantially smooth outer surface in its outer diameter, and defining a formed inner diameter. In this context, those skilled in the art will observe that the desired smoothness of the outer surface is determined according to the particular environment and the circumstances in which the gasket element 400 is adjusted. For example, the pressures expected to withstand the resulting seal formed by the gasket element 400 will affect the smoothness of the outer surface. In one embodiment, the tubular body 440 can include the portion of the outer surface that includes a serrated area or a rough surface area that can be used as an anchoring portion when the packing element 400 is adjusted.
To form a seal with respect to the liner 10, the gasket element 400 includes one or more sealing elements 450A-B. The sealing elements 450A-B can be elastomeric strips. In another embodiment, the sealing elements 450A-B are swelling elastomers. The sealing elements 450A-B are preferably fixed in grooves 455A-B formed in the tubular body 440. For example, the sealing elements 450A-B can be connected to the grooves 455A-B by a connection material during the manufacturing stage of the packing element 400. Each slot 455A-B includes a volume space 470A-B. As shown in figure 13, volume space 470A-B is located at the bottom of slot 455A-B. In other embodiments, the volume space 470A-B can be located in different positions and in different configurations in the slot 455A-B (see volume space in figures 5-10, for example). In general, volume space 470A-B is used to substantially prevent distortion of sealing element 450A-B with expansion of gasket element 400. The size of volume space 470A-B may vary depending on the slot configuration 455A -B. In one embodiment, the 455A-B slot has 3-5% more volume due to the 470A-B volume space than a slot without a volume space.
Each sealing element 450A-B includes a first sealing strip 460 and a second sealing strip 465. Sealing strips 460, 465 are embedded in the sealing element 450A-B. In one embodiment, the sealing strips 460, 465 are springs. Sealing strips 460, 465 are used to limit extrusion of sealing element 450A-B with expansion of gasket element 400.
The portions of the outer surface between the sealing elements 450A-B form sealing surfaces of non-elastomer 430A-C. The 430A-C non-elastomer sealing surfaces may include grip members, such as carbide inserts, serrated or rough surfaces that allow the 430A-C non-lastomer sealing surfaces to seal and act as an anchor with expansion of the gasket element 400. For example, the anchoring portion (i.e., rough surface on surfaces 430A-C) comes into contact and engages with the surrounding liner 10 when the gasket element 400 is adjusted, as shown in the figure 15. The anchoring portion can be used to hold the gasket sealing elements 450A-B in place by preventing movement of the gasket element 400. In other words, the anchoring portion ensures that the gasket sealing elements 450A- B do not move with respect to the liner 10 when subjected to a high pressure differential, thus allowing the gasket sealing elements 450A-B to maintain the sealing relationship with the liner 10 while at the same time mpo reduces wear on the gasket element 400. In one embodiment, surfaces 430A-C are hardened by induction or similar means so that surfaces 430A-C penetrate an internal surface of the liner 10 to provide a robust anchoring means when the gasket element 400 is activated. In this way, the anchoring portion can be used to help resist the axial movement of the gasket sealing elements 450A-B with respect to the liner 10 when the gasket sealing elements 450A-B are subjected to a high pressure differential.
The anchoring portion (i.e., rough surface on surfaces 430A-C) can be used in place of a gripping member (not shown) on the well bottom tool 300. Instead of having a separate gripping member, such as wedges, in the downhole tool 300, the anchoring portion can be configured to retain the downhole tool 300 within the liner 10, thereby reducing the number of components in the downhole tool 300 and reducing the overall length of the downhole tool 300. Other benefits of using the anchoring portion (instead of separate wedges) would be that the total stroke length of the downhole tool 300 would be reduced; elimination of potential leakage paths and manufacturing costs would be reduced without compromising performance. The length and / or the size of the surfaces 430A-C can be arranged so that when the gasket element 400 is adjusted, sufficient gripping force is created between the anchoring portion and the surrounding liner 10 to support the bottom tool well 300 inside the well bore. Surfaces 430A-C can also be hardened by induction so that surfaces 430A-C penetrate the surface coating 10 to provide a robust anchoring means with activation of the gasket element 400. As discussed here in connection with figures 13- 15, the wedge member 325 slides with respect to the mandrel 305 to the position under the tubular body 440 to expand the gasket element 400 radially outwardly in contact with the liner 10. In another embodiment, the wedge member 325 and the mandrel 305 are formed as a single member (not shown) with an inclined surface, thus eliminating the need for a seal 310 and creating a thicker portion of the well bottom tool 300 next to the gasket element 400. Additionally, the tubular body 440 it can be configured to move along the inclined surface of the single member to expand the gasket element 400 radially outwardly in contact with the liner 10.
The number and size of the 450A-B sealing elements defines the surface area of the 430A- C non-elastomer sealing surfaces. It should be noted that any number of 450A-B sealing elements and the 430A- non-elastomer sealing surfaces. C can be provided. The gasket element 400 shown includes two sealing elements 450A-B and defining three sealing surfaces of non-elastomer 430A-C. In general, a relatively narrow width of each non-elastomer sealing surface 430A-C is preferred in order to achieve sufficient contact force between the surfaces and the coating 10.
The formed internal diameter of the tubular body 440 is defined by a plurality of ribs 475 separated by a plurality of cuts 480 (e.g., voids). The cuts 480 allow a degree of deformation of the tubular body 440 when the gasket element 400 is arranged in a sealed position. In addition, cuts 480 help to reduce the amount of adjusting force required to expand the gasket element 400 to the sealed position. In other words, by removing the material (e.g. cuts 480) from the tubular body 440, the force required to expand the gasket element 400 is reduced. In one embodiment, the volume of the cuts 480 (empty spaces) is between 25% - 40% of the volume of the tubular body 440. The ribs 475 are annular members integrally formed as part of the tubular body 440. Each rib 475 forms a contact surface with the actuator 485 in the inner diameter of the tubular body 340, where the rib 475 is arranged on the inclined surface 375. In an illustrative embodiment, the inclined surface 375 has an angle Y between about 2 degrees and about 6 degrees. Therefore, the formed internal diameter defined by the contact surface with the actuators 485 can have a substantially similar angle of inclination.
The tubular body 440 additionally includes an O-ring seal 495 in the cut 490. The seal 495 is configured to form a fluid-tight seal with respect to the external inclined surface 375 of the wedge member 325. In one embodiment, the seal 495 includes sealing strips (i.e., anti-extrusion strips) in a similar way as sealing element 450A-B. In addition, a volume space can be defined between seal 495 and cut portion 490 in a similar manner to volume space 470A-B. It is observed that in another modality, the 480 cuts can also, or alternatively, carry seals in their respective internal diameters.
In figure 15, the gasket element 400 is shown in a sealed (adjusted) position, corresponding to figure 14. During expansion of the gasket element 400, the sealing element 450A-B moves in contact with the liner 10 to create a seal between the gasket element 400 and the liner 10. As the sealing element 450A-B comes in contact with the liner 10, the sealing element 450A-B changes configuration and occupies the portion of the volume space 470A - B. In the embodiment shown, the volume space 470A-B is located on the side of the gasket element 400, which is the last portion to be expanded by the wedge member 325. The location of the volume space 470A-B on the element gasket 400 allows sealing element 450A-B to change position (or reconfigure) within groove 455A-B during expansion operation. In addition, the volume of the 470A-B volume space may change during the expansion operation. In one embodiment, the volume of the 470A-B volume space can be reduced by 5% - 15% during the expansion operation.
During the expansion operation, the sealing strips 460, 465 on the sealing element 450A-B are launched towards an interface 415 between the gasket element 400 and the liner 10, as shown in figure 6. The volume space 470A -B allows sealing element 450A-B to move inside groove 455A-B and position sealing strips 460, 465 in a location close to interface 415. Compared to volume space 470A-B before expansion ( figure 13) and after the expansion (figure 15), a small volume space remains after the expansion operation. It should be noted that the small volume space is optional. In other words, there may not be a small volume space (see volume space 470A-B in figure 15) after the expansion operation.
Sealing strips 460, 465 are configured to substantially prevent extrusion of sealing element 450A-B beyond interface 415. In other words, sealing strips 460, 465 expand radially outward with gasket element 400 and prevent the elastomeric material of the sealing element 450A-B from flowing through the interface 415 between the gasket element 400 and the liner 10. In one embodiment, the sealing strips 460, 465 are springs, such as toroidal spiral springs , which expand radially outward due to expansion of the gasket element 400. As the spring expands radially outward during the expansion operation, the spring coils act as a barrier to the flow of the elastomeric material from the 450A-B seal. After the expansion operation, the sealing strips 460, 465 can prevent the extrusion of the sealing element 450A-B when a space between the gasket element 400 and the liner 10 is increased due to the bottom pressure of the well. In other words, the sealing strips 460, 465 connect the space between the gasket element 400 and the liner 10 and prevent extrusion of the sealing element 450A-B. In this way, the sealing strips 460, 465 on the sealing element 450A-B act as an anti-extrusion device or an extrusion barrier during the expansion operation and after the expansion operation.
There are several benefits of the extrusion barrier created by the sealing strips 460, 465. One benefit of the extrusion barrier would be that the outer surface of the sealing element 450A-B in contact with the liner 10 is limited to a region between the sealing strips 460, 465, which allows a high pressure seal to be created between the gasket element 400 and the liner 10. In one embodiment, the gasket element 400 can create the high pressure seal in the range of (12,000 to 15,000 psi) . An additional benefit of the extrusion barrier would be that the packing element 400 is able to create a seal with a surrounding coating that can have a range of internal diameters due to API tolerances. Another benefit would be that the extrusion barrier created by the sealing strips 460, 465 can prevent erosion of the sealing element 450A-B after the gasket element 400 is expanded. Erosion of the sealing element 450A-B can eventually lead to a malfunction of the gasket element 400.
The gasket element 400 is at a diametrically enlarged end of the inclined surface 375 and is arranged as a sandwich between the wedge member 325 and the casing 10. The dimensions of the downhole tool 300 are preferably such that the gasket element 400 is completely engaged with the liner 10, before the tubular body 440 reaches the end of the inclined surface 375. Note that in the sealed position, the sealing elements 450A-B and the sealing surfaces of non-elastomer 430A-C were expanded in contact with the coating 10.
As such, it is clear that the tubular body 440 has undergone a degree of deformation. The deformation process can occur, at least in part, as the gasket element 400 slides up to the inclined surface 375, before making contact with the inner diameter of the coating 10. Additionally or alternatively, the deformation can occur as a result of contact with the inner diameter of the liner 106. In any case, the deformation process causes the sealing elements 450A-B and the non-elastomeric sealing surfaces 430A-C to contact the inner diameter of the liner 10 in the position fenced. In addition, non-elastomeric support seals prevent extrusion of the sealing elements 450A-B.
Figure 16 illustrates a suspension assembly 500 in an unpositioned position. In the completion stage shown in figure 16, a well hole was coated with the coating column 80. Subsequently, the suspension assembly 500 is positioned within the coating 80. The suspension assembly 500 includes a suspension 530, which is an annular member. The suspension assembly additionally includes an expansion sleeve 510. Typically, the suspension assembly 500 is lowered into the well bore by a seating tool arranged at the lower end of the working column (not shown).
The suspension assembly 500 includes the suspension 530 of the present invention. The hanger 530 can be used to fix or lock linings from an inner wall of the liner 80. The hanger 530 can also be used as an inlay to seal an annular space formed between the hanger assembly 500 and the well hole liner 80 or in the annular space between the suspension assembly 500 and an uncoated well bore. The hanger 530 optionally includes grip members, such as tungsten carbide inserts or wedges. The gripping members can be arranged on an external surface of the hanger 530. The gripping members can be used to grip an internal surface of the liner 80 with the expansion of the hanger 530.
As shown in figure 16, the hanger 530 includes a plurality of seal assemblies 550 arranged on the outer surface of a tubular body of the hanger 530. The plurality of seal assemblies 550 are circumferentially spaced around the hanger 530 to create a seal between the suspension assembly 500 and casing 80. Each sealing assembly 550 includes a sealing ring 535 arranged in a gasket compressor 540. A connection material, such as glue (or other fastening means), can be used on selective sides of the gasket compressor 540 to fix a seal ring 535 to the gasket compressor 540. Attaching a seal ring 535 to the gasket compressor 540 is useful to prevent a seal ring 535 from becoming unstable and having a pistol effect when the hanger 530 it is positioned in the casing 80 and before the expansion of the hanger 530. Connecting a sealing ring 535 to the gasket compressor 540 is also useful to prevent the flow of circulation from having an effect pistonizing as the installation of coatings typically requires fluid displacements prior to sealing and anchoring the suspension assembly 500.
The gasket compressor side 540 creates a volume gap 545 between a gasket 535 and the gasket compressor 540. As determined here, volume space 545 is generally used to minimize distortion of a gasket 535 with the expansion of the hanger 530. The volume space 545 can be created in any configuration (see figures 7-10, for example) without deviating from the principles of the present invention. In addition, the size of the volume space 545 may vary depending on the configuration of the gasket compressor 540. A gasket 535 includes a first gasket 555 and a second gasket 560. Gaskets 555, 560 are recessed in opposite sides of a seal ring 535. Seal bands 555, 560 are used to limit the extrusion of a seal ring 535 during and after expansion of a seal assembly 550.
The suspension assembly 500 includes the expansion sleeve 510 which is used to expand the suspension 530. In one embodiment, the expansion sleeve 510 is attached to the suspension 530 by an optional release member 520, such as a cutting pin . The expansion sleeve 510 includes an inclined outer surface 515 and a hole 525. The expansion sleeve 510 additionally includes an end portion 505 that is configured to interact with a driving member (not shown). Expansion sleeve 510 optionally includes a self-adjusting locking mechanism (not shown) that allows expansion sleeve 510 to travel in one direction and avoid traffic in the opposite direction.
To adjust the suspension assembly 500, the driving member is driven axially in one direction towards the suspension 530. The axial movement of the driving member can be caused, for example, by the mechanical force applied from the weight of the tube column or hydraulic pressure that acts on a piston. The driving member, in turn, engages the end portion 505 of the expansion sleeve 510 in order to move the expansion sleeve 510 axially towards the hanger 530. At a predetermined force, the optional release member 520 is disengaged, which allows the expansion sleeve 510 to move with respect to the hanger 530. The hanger 530 is prevented from moving with respect to the expansion sleeve of the wedge 510. As the inclined outer surface 515 of the expansion sleeve 510 engages the internal surface of the hanger 530, the hanger 530 is moved to the diametrically expanded position.
The positioned position of the suspension assembly 500 is shown in figure 17. In the positioned position, the expansion sleeve 510 is positioned inside the suspension 530. In other words, the expansion sleeve 510 is not removed from the suspension 530. Said arrangement it can allow the expansion sleeve 510 to apply a force to the hanger 530 after the expansion operation. The bore 525 of the expansion sleeve 510 allows other well bore tools to pass through the suspension assembly 500 before the expansion of the suspension 530 and after the expansion of the suspension 530. When comparing the suspension assembly 500 in the unpositioned position (figure 16) and the suspension assembly 500 in the positioned position (figure 17), it is observed that the expansion sleeve 510 is disposed substantially outside the suspension 530 in the unpositioned position and the expansion sleeve 510 is arranged inside the suspension 530 in the positioned position. Expansion sleeve 510 remains inside the hanger 530 after the expansion operation is complete. As such, the expansion sleeve 510 is configured to support the hanger 530 after the expansion operation.
As shown in figure 17, the hanger 530 is launched in contact with the liner 80 to form the fluid-tight seal that is formed in part by the metal-to-elastomer seal and a metal-to-metal contact. More specifically, a seal ring 535 moves in contact with the liner 80 to create a seal between the hanger 530 and the liner 80. As a seal ring 535 contacts the liner 80, a seal ring 535 changes the configuration and occupies the portion of the volume space 545. In the mode shown, the volume space 545 is located on the side of a seal assembly 550 which is the first portion to be expanded by the expansion sleeve 510. The location of the space volume 545 in a seal assembly 550 allows a seal ring 535 to change the position (or reconfigure) inside the gasket compressor 540 during the expansion operation. In addition, the sealing strips 555, 560 on a sealing ring 535 are launched towards an interface between a sealing assembly 550 and the liner 80 to prevent the elastomeric material of a sealing ring 535 from flowing through the interface 585 between a seal assembly 550 and the liner 80. In one embodiment, the sealing strips 555, 560 are springs, such as toroidal spiral springs, which expand radially outward due to the expansion of the suspension 530. As the spring expands radially outward during the expansion operation, the spring coils act as the barrier for the flow of elastomeric material from a seal ring 535. In addition, after expansion of the 530 hanger, the seal bands 555, 560 can prevent extrusion of a seal ring 535 when the space between the suspension assembly 500 and the liner 80 is increased due to pressure. In other words, the sealing strips 155, 160 connect the space, and the liquid extrusion space between the windings of the sealing strips 155, 160 grows considerably less compared to an annular space that is formed when a sealing ring does not include the sealing strips. In this way, the sealing strips 555, 560 on a sealing ring 535 act as an anti-extrusion device or an extrusion barrier during the expansion operation and after the expansion operation.
Figure 18 illustrates a view of an installation tool 600 for use in a dry seal tensile elongation operation. A seal ring 135 is installed in the gasket compressor 140 during the manufacturing process of the hanger 100 by the dry seal tensile stretching operation. Installation tool 600 generally includes a tapered tool 675, a loading tool 625 and a thrust plate 650. A low friction coating can be used in the dry seal tensile stretching operation to reduce friction between a seal ring 135 and installation tool components 600. In one embodiment, the low friction coating can be applied to a tapered portion 610 of the tapered tool 675 and the edge portion 630 to the loading tool 625. In another embodiment, the low friction coating can be applied to the seal ring portion 135. The low friction coating can be a dry lubricant, such as Impregion or Teflon®.
As shown in figure 18, a seal ring 135 is moved to the taper 610 of the tapered tool 675 in the direction indicated by arrow 620. The tapered tool 675 is configured to change a seal ring 135 from the first configuration having a first diameter internal to a second configuration having a second larger internal diameter (for example, tensile elongation an o-ring). As illustrated, the loading tool 625 is positioned on a small diameter portion 640 of the tapered tool 675 so that the edge 630 can receive a sealing ring 135. The loading tool 625 is attached to the tapered tool 675 by a plurality of connection members 615, such as screws. After a seal ring is in the second configuration, a seal ring 135 is moved to the edge 630 of the loading tool 625.
Figure 19 illustrates a view of the loading tool 625 with a seal ring 135. The loading tool 625 and the thrust plate 650 are removed from the end 615 of the tapered tool 600 in the direction indicated by the arrow 645. In general, the loading tool 625 is an annular tool that is configured to receive and retain a seal ring 135 in a second configuration (for example, large bore). Figure 20 illustrates a view of the loading tool 625 and the thrust plate 650 on the expandable hanger 100. The loading tool 625 is positioned on the hanger 100 so that the edge 630 of the loading tool 625 (and seal ring 135) it is located adjacent to the gasket compressor 140. Subsequently, the loading tool 625 is attached to the hanger 100 by a plurality of connection members 615. Before placing a seal ring 135 on the gasket compressor 140, a connection material such as like glue, it is applied to the selective sides of the 140 gasket compressor.
Fig. 21 illustrates a view of the push plate 650 and a loading tool 625. During the dry seal pull stretch operation, the push plate 650 engages the sealing member 135 as the push plate 650 is moved in the direction indicated by arrow 665. The thrust plate throws a seal ring 135 out of the edge 630 of the loading tool 625 and into the gasket compressor 140 of the hanger 100. This sequence of steps can be repeated for each seal ring 135.
As mentioned here, the gasket element 400 can be used with different downhole tools. For example, the gasket element 400 can be used as a support for a compression or inflatable element, or in conjunction with the stage tool, or integral with the gasket removal stage tool. Figures 22 and 22A illustrate an example of the gasket element with the gasket removal stage tool 700. For convenience, the components in the stage tool 700 that are similar to the components in the downhole tool 300 will be marked with the same indicator number. The stage tool 700 is attached to a casing 85 and lowered into the borehole of the well 75. The stage tool 700 is used during the cementing operation to inject cement into a ring 795 formed between the casing 85 and the bore of the well 75 at specified locations in well bore 75. As shown, stage tool 700 includes packing element 400, expansion cone 325, a mechanical piston assembly 725 and wedges 705.
As shown in figure 22, stage tool 700 includes 705 wedges and a 755 gauge ring. 705 wedges are configured to run along the 755 gauge ring with the activation of 705 wedges. Stage 700 additionally includes a self-adjusting locking mechanism that allows 705 wedges to travel in one direction and avoids traffic in the opposite direction. The locking mechanism is implemented as a lower locking ring 760. Upon activation, the wedges 705 are configured to catch the borehole 75 to support the stage tool 700 in the borehole 75.
In another embodiment, an anchoring portion (i.e., rough surfaces on surfaces 430A-C on gasket element 400) can be used in place of wedges 705 to support stage tool 700 in bore of well 75, thereby reducing the number of components on stage tool 700 and reducing the overall length of stage tool 700. As determined here, the length and / or size of surfaces 430A-C can be arranged so that when gasket element 400 is adjusted, a sufficient gripping force is created between the anchoring portion and the surrounding well bore 75 to support the well bottom tool 300 within the well bore 75. Surfaces 430A-C can also be hardened by induction so that the surfaces 430A-C penetrate the hole surface of well 75 to provide a robust anchoring means with activation of the gasket element 400.
Figure 22A illustrates a top end view of stage tool 700. As shown, stage tool 700 includes an inner sleeve 710 with ports 745 and a member body 730 with ports 750. As will be described here, inner sleeve 710 it is configured to move with respect to the member body 730 to align the ports 745, 750 and thus create a fluid path between an inner portion and an outer portion of the stage tool 700. The stage tool 700
finally it includes a closing seat 715 and an opening seat 720. Stage tool 700 also includes an upper locking ring 740 which is fixed to the housing by means of cutting screws 735. Additionally, stage tool 700 includes a sleeve external 790.
As shown in figure 22A, a plug 775 is disposed in the stage tool 700. After the stage tool 700 is located in the hole of the well 75, the plug 775 is lowered into the stage tool 700. The plug 775 moves through a hole 765 of the stage tool 700 until it contacts the opening seat 720 in the inner sleeve 710. The plug 775 is configured to block fluid communication through hole 765 of the stage tool 700.
Figures 23, 23A and 23B illustrate the activation of the wedges 705 in the stage 700 tool. After the plug 775 blocks the fluid communication through hole 765 of the stage 700 tool, the fluid pumped from the surface creates a fluid pressure inside the hole 765 of the stage tool 700. At a predetermined pressure, the inner sleeve 710 moves with respect to the member body 730 until the ports 745 on the inner sleeve 710 align with the ports 750 on the member body.
After ports 745, 750 are aligned, fluid in hole 765 can flow through ports 745, 750 into fluid passage 770 to adjust the gasket element 400 and wedges 705. The fluid that moves through the fluid passage 770 generates fluid pressure which causes the mechanical piston assembly 725 to apply force to the wedge member 325 which is subsequently applied to the retaining sleeve 320. The force on the retaining sleeve 325 causes the cutting pin 785 breaks and allows the 705 wedges to move along the 755 gauge ring. The movement of the 705 wedges in a first direction with respect to the 755 gauge ring causes the 705 wedges to move radially outward and engage the hole in the well 75, as shown in figure 23B. The self-adjusting locking mechanism (ie locking ring 760) prevents traffic on the 705 wedges in a second opposite direction. The wedges 705 and the packing element 400 are configured so that the force to break the cutting pin 785 is less than the force to move the packing element 400 along the expansion cone 325. As a result, the packing pin cut 785 breaks and the wedges 705 move along the 755 gauge ring before the gasket element 400 moves along the expansion cone 325. After the wedges 705 have been adjusted, the retaining sleeve 325 moves under the gasket element 400, as determined here.
The gasket element 400 can be configured so that a force of a pre-selected magnitude is required in order to radially expand it during the packer adjustment processes. This radial expansion is effected by the axial movement of the wedge member 325 with respect to the packing element 400. Therefore, due to the angle of inclination of the wedge member 325 and friction between the wedge member 325 and the packing element 400, the force axial force required to radially expand the packing element 400 can be correlated to the corresponding axial force that must be applied to the wedge member 325 in order to achieve the relative movement between the wedge member 325 and the packing element 400. Thus, there is a threshold axial force that must be applied to the wedge member 325 in order to radially expand the packing element 400.
In operation, an axial force can be applied to the wedge member 325 (and therefore over the gasket element 400) which is less than said threshold axial force. In such cases, the applied axial force is communicated from the wedge member 325 to the gasket element 400, and from the gasket element 400 to the gripper fingers 355, and the retaining sleeve 320 without the gasket element 805 experience any radial expansion (or any substantial radial expansion). Therefore, said axial force applied less than the threshold axial force can be applied through the gasket element 400 in order to effect the operation of another tool and / or another part of the same tool, such as adjustment wedges 705 as described here .
In addition, in operation, an axial force can be applied to the wedge member 325 (and therefore to the gasket element 400) which is greater than the aforementioned threshold axial force. In such cases, if there is little or no space available for the packing element 400, clamp fingers 355, and the retaining sleeve 320 to move axially, then the wedge member 325 can move axially with respect to the packing element 400 In this way, the wedge member 325 is further forced under the packing element 400, resulting in radial expansion of the packing element 400, which can continue until the packing element 400 is moved to its position positioned in the well bore. .
In another embodiment, the aforementioned threshold axial force can be preselected by including a lock and / or fixation capable of being dimensioned between the wedge member 325 and the packing element 400. Said threshold axial force can be pre-selected selected by the configuration and (for example) construction material selection of the gasket element 400 alone, or in combination with the configuration and selection of a suitable lock and / or fixation capable of being dimensioned between the wedge member 325 and the control element gasket 400.
In practice, just as an example, the threshold axial force mentioned above can be around (10,000 lb), although other magnitudes above and below these items are contemplated, and can be adjusted to suit specific applications.
Figures 24, 24A and 24B illustrate the activation of the packing element 400 in the stage tool 700. After the wedges 705 have engaged the bore of the well 75, the fluid pressure generated by the fluid that moves through the fluid passage 770 causes the mechanical piston assembly 725 to activate the gasket element 400. In a similar manner as described here, the wedge member 325 is launched under the tubular body 440 of the gasket element 400. As a result, the gasket element 400 moves radially outwardly in contact with the well hole 75, and a seal is formed between the stage tool 700 and the well hole 75.
Figures 25, 25A and 25B illustrate the movement of the outer sleeve 790 of the stage tool 700. After the gasket element 400 and the wedges 705 have engaged the bore of the well 75, the fluid pressure generated by the fluid moving through the fluid passage 770 causes the outer sleeve 790 to move with respect to the member body 730. The movement of the outer sleeve 790 exposes ports 745, 750, as shown in figure 25A. Exposure of ports 745, 750 opens the fluid passage between hole 765 of stage 700 tool and ring 795 formed between stage 700 tool and well 75 hole. Cement can be pumped through hole 765 in the doors 745, 750 and inside ring 795 during the cementing operation. After the cementing operation is complete, the closing plug 780 is lowered into the stage tool 700.
Figures 26 and 26A illustrate the closing of doors 745, 750 of stage tool 700 after the cementing operation is complete. The closing plug 780 moves through hole 765 of the stage tool 700 until it contacts the closing seat 715 attached to the inner sleeve 710, as shown in figure 26A. The closing plug 780 is configured to block fluid communication through hole 765 of the stage 700 tool. The fluid pumped from the surface creates a fluid pressure inside hole 765 of the stage 700 tool. At a predetermined pressure, the inner sleeve 710 moves with respect to the member body 730 until the ports 745 in the inner sleeve 710 come out of alignment with the ports 750 in the member body 730. At that point, the fluid in the hole 765 may no longer flow through the ports 745, 750; thus the fluid passage between bore 765 and ring 795 is closed.
Figures 27 and 27A illustrate the well bottom tool 800 in an insertion position (not positioned). The well-bottom tool 800 can be used to seal the desired location in a well hole. For convenience, components in tool 800 that are similar to components in tool 300 will be marked with the same indicator number. Tool 800 includes a set of wedges 850 and a gasket element 805.
The wedge set 850 includes wedges 840 and a wedge member 845. The wedge member 845 is generally cylindrical and slidably arranged over mandrel 305. The well-bottom tool 800 includes a locking mechanism that allows the wedge member 845 travels in one direction (arrow 865) and avoids traffic in the opposite direction (arrow 870). In one embodiment, the locking mechanism is implemented as a ratchet ring 390 and is arranged on the ratchet surface 395 of mandrel 305. Ratchet ring 390 is lowered into, and carried by, sleeve 320. In this case, the interface ratchet ring 390 and ratchet surface 395 allow sleeve 320 and wedge member 845 to travel only in the direction as indicated by arrow 865. As shown, sleeve 320 is attached to wedge member 845 by a pin retainer 890, and the sleeve is fixed to the mandrel 305 by a cutting pin 875.
The gasket element 805 includes a tubular body 440, which is an annular member. The tubular body 440 includes an optional support member 810 with the grip surface 815. The support member 810 is configured to engage the liner 10 with the activation of the gasket element 805. In a similar manner as described here, the support member wedge 325 is configured to move axially along the outer surface of mandrel 305. The gasket element 805 is prevented from moving with respect to the wedge member 325. As a result, the gasket element 805 is forced to slide over the inclined surface of the wedge member 325. The positive inclination of the inclined surface launches the gasket element 805 into the diametrically expanded position.
The gasket element 805 can be configured so that a force of the preselected magnitude is required in order to radially expand this during the packer adjustment process. This radial expansion is effected by the axial movement of the wedge member 325 with respect to the packing element 805. Therefore, because of the angle of inclination of the wedge member 325 and friction between the wedge member 325 and the packing element 805, the force axial force required to radially expand gasket element 805 can be correlated to a corresponding axial force that must be applied to the wedge member 325 in order to achieve a relative movement between wedge member 325 and gasket element 805. Thus, there is an axial force threshold that must be applied to the wedge member 325 in order to radially expand the gasket element 805.
In operation, an axial force can be applied to the wedge member 325 (and therefore over the gasket element 805) which is less than this threshold axial force. In such cases, the applied axial force is communicated from the wedge member 325 to the packing element 805, and from the packing element 805 to clamp fingers 355, and retaining sleeve 320 without the packing element 805 experiencing any radial expansion (or any substantial radial expansion). Therefore, such an applied axial force less than the threshold axial force can be applied through the gauge element 805 in order to perform the operation of another tool and / or another part of the same tool, such as adjustment wedges 840 as described here.
In addition, in operation, an axial force can be applied to the wedge member 325 (and therefore over the gasket element 805) which is greater than the aforementioned threshold axial force. In such cases, there is little or no space available for the gasket element 805, gripper fingers 355, and retaining sleeve 320 to move axially, so the wedge member 325 can move axially with respect to the gasket element 805. Thus , the wedge member 325 is further forced under the packing element 805, resulting in radial expansion of the packing element 805, which can continue until the packing element 805 is moved to this position positioned in the bore of the well.
In another embodiment, the aforementioned threshold axial force can be pre-selected by including the lock and / or fixation capable of being dimensioned between the wedge member 325 and the gasket element 805. This threshold axial force can be pre-selected by a configuration and (for example) selection of construction materials of the gasket element 805 alone, or in combination with the configuration and selection of a suitable lock and / or fixation capable of being dimensioned between the wedge member 325 and the gasket 805.
In practice, as an example, the threshold axial force mentioned above can be around (10,000 lb), although other magnitudes above and below this figure are contemplated, and can be adapted to suit specific applications.
Figures 28 and 28A illustrate the positioning of the wedges 840 in the tool 800. In the mode shown, the sequence positioning for the tool 800 is to adjust the set of wedges 850 (figure 28A) and then the adjustment of the gasket element 805 ( figure 29A). In another embodiment, the gasket element 805 can be adjusted, and then the set of wedges 850 can be adjusted.
To adjust the set of wedges 850, a drive sleeve (not shown) is driven axially in the direction of arrow 865. The axial movement of the drive sleeve can be caused by, for example, mechanical force applied from the weight of the drive column. tube or hydraulic pressure acting on a piston. The drive sleeve applies a force to the wedge member 325, which drives the wedge member 325 axially along the outer surface of the mandrel 305. The movement of the sleeve 320 along the outer surface of the mandrel 305 towards the wedge member 845 causes the cutting pin 875 to break. Thereafter, the sleeve 320 moves along the mandrel 305 thereby allowing the retaining pin 890 to be released. The sleeve 320 moves until the surface 880 of the sleeve 320 contacts an end surface 885 of the wedge member 845 (compare figures 27A and 28A). At that point, sleeve 320 throws wedge member 845 under wedges 845. As a result, wedges 840 expand radially outwardly and engage re-coating 10.
Figures 29 and 29A illustrate the positioning of the gasket element 805 in the tool 800. After the wedge set 850 is adjusted, the gasket element 805 is adjusted. To adjust the gasket element 805, the drive sleeve drives the wedge member 325 axially along the outer surface of the mandrel 305 in a similar manner as described here. As the path continues over the mandrel 305, the wedge member 325 is driven under the packing element 805. The packing element 805 is prevented from moving in relation to the wedge member 325 by the provision of the ratchet ring 390 and the ratchet surface 395. As a result, the gasket element 400 is forced to slide over the inclined surface 375. The positive inclination of the inclined surface throws the gasket element 805 into the diametrically expanded position. As the gasket element 805 expands radially outwardly, the handle surface 815 of the handle member 810 engages the bore of the well. The gripping member 810 can be used to hold the gasket sealing elements 450A-B in place by preventing movement of the gasket element 805. In other words, the gripping member 810 ensures that the sealing elements of gasket 450A-B do not move with respect to coating 10 when subjected to high pressure differential, thus allowing gasket sealing elements 450A-B to maintain the sealing relationship with coating 10. In one embodiment, the surface handle 815 is hardened by induction or similar means so that the handle surface 815 penetrates an inner surface of the liner 10 to provide a robust anchoring means when the gasket element 805 is activated. In this way, the gripping member 810 can be used to help resist the axial movement of the gasket sealing elements 450A-B with respect to the liner 10 when the gasket sealing elements 450A-B are subjected to a high pressure differential.
Figures 30 and 30A illustrate views of the well bottom tool 980 in an insertion position (not positioned). For convenience, components in tool 980 that are similar to components in tool 300 and tool 800 will be marked with the same indicator number. Tool 980 includes a tilt member 985, such as a spring, between sleeve 320 and sleeve 855. Sleeve 990 is attached to sleeve 855 by means of a locking screw 995. Tool 980 operates in a similar manner to tool 800. The tilt member is configured to apply a guiding force to the wedge member 845 after the wedges 840 are adjusted (see figure 28A). In other words, after the cutting pin 875 breaks and the retaining pins 890 are released, the movement of the sleeve 320 along the mandrel 305 causes the tilt member 985 to be compressed between sleeves 320, 855. The sleeve 320 it is locked in one direction and is able to move in another direction by virtue of locking mechanism 390, 395. Thus, the compressed tilt member 985 applies the guiding force to the wedge member 845 (via sleeve 855). The guiding force can be used to hold the wedge member 845 under the slide 840 after the wedges 840 have been adjusted.
Figures 31 and 31 A illustrate the well bottom tool 900 in an insertion position (not positioned). For convenience, components in tool 900 that are similar to components in tool 300 will be marked with the same indicator number. Tool 900 includes a gasket element 905 that can be used to seal a desired location in a well bore. The gasket element 905 is held in place by the retaining sleeve 320. The gasket element 905 can be coupled to the retaining sleeve 320 by a variety of locking interfaces. In one embodiment, the retaining sleeve 320 includes a plurality of pincer fingers 355. The end ends of the pincer fingers 355 are interlocked with the annular edge 405 of the packing element 905.
The gasket element 905 includes the tubular body 440, which is an annular member. The tubular body 440 has an anchor 910 with a handle surface 915. Anchor 910 is configured to engage the liner 10 with the activation of the gasket element 905. Anchor 910 can be used in place of a handle member (not shown) ) in the downhole tool 900. Instead of having a separate gripping member, such as wedges, in the downhole tool 900, anchor 910 can be configured to hold the downhole tool 900 inside of the liner 10, thereby reducing the number of components in the downhole tool 900 and reducing the overall length of the downhole tool 900. Other benefits of using anchor 910 (instead of separate wedges) would be that the stroke length total well-bottom tool 900 would be reduced; elimination of potential leakage paths and manufacturing costs would be reduced without compromising performance. The length and / or size of the handling surface 915 can be arranged so that when the gasket element 905 is adjusted, a sufficient gripping force is created between the anchor 910 and the surrounding liner 10 to support the well-bottom tool 900 inside the well hole.
The downhole tool 900 includes a self-adjusting locking mechanism that allows the retaining sleeve 320 to travel in one direction and avoid traffic in the opposite direction. The locking mechanism is implemented as a ratchet ring 390 disposed on the ratchet surface 395 of a mandrel 950. The ratchet ring 390 is lowered into, and carried by, the retaining sleeve 320. In this case, the interface of the ratchet ring 390 and ratchet surface 395 allow the retaining sleeve 320 to travel only in the direction of arrow 965, with respect to mandrel 950.
As shown in figure 31, mandrel 950 has an outer inclined surface 955. As such, mandrel 950 has a first portion 950A with a first thickness and a second portion 950B with a second larger thickness. As will be described here, the gasket element 905 is launched along the inclined surface 955 of the mandrel 950 during the positioning process. Using the inclined surface 955 of mandrel 950 to activate packing element 905, instead of having a separate wedge member, reduces the number of components in the downhole tool 900 and reduces the overall length of the downhole tool 900. Other benefits of using the inclined surface 955 of the mandrel 950 (instead of a separate wedge member) would be the elimination of potential leakage paths between the separate wedge member and the mandrel, and manufacturing costs would be reduced without compromising performance. Another benefit of using the inclined surface 955 of the mandrel 950 would be that the added thickness of the mandrel 950 provides bodily integrity at ultra high pressure below the gasket element 905.
Figures 32 and 32A illustrate the well bottom tool 900 in a positioned position. To adjust the well-bottom tool 900, a drive sleeve 935 is driven axially in the direction of arrow 965. The axial movement of the drive sleeve 935 can be caused, for example, by the mechanical force applied from the weight of the drive column. tube or hydraulic pressure acting on a piston. The drive sleeve 935, in turn, drives the retaining sleeve 320 and the packing element 905 axially along the inclined surface 955 of the mandrel 950. The ratchet ring 390 and the ratchet surface 395 ensure that the retaining sleeve 320 and the gasket element 905 travel only in the direction of the arrow 965. As the path continues over the mandrel 950, the gasket element 905 moves along the inclined surface 955 to the diametrically expanded position. The positioned position of the downhole tool 900 is shown in figure 32A.
In the positioned position, the gasket element 905 is launched in contact with the liner 10 to form the fluid tight seal and the handle surface 915 of anchor 910 engages the liner 10. Anchor 910 can be used to support tool 900 in the liner 10. Additionally, anchor 910 can be used to hold the gasket sealing elements 450A-B in place by preventing movement of the gasket element 905. More specifically, the anchor 910 ensures that the gasket sealing elements 450A -B do not move with respect to liner 10 when subjected to a high pressure differential, thus allowing the gasket sealing elements 450A-B to maintain the sealing relationship with liner 10, while at the same time reducing wear on the liner. gasket 905. In one embodiment, the handle surface 915 of anchor 910 is hardened by induction or similar means so that the handle surface 915 penetrates an inter surface that of the liner 10 to provide a robust anchoring means when the gasket element 905 is activated. In this way, anchor 910 can be used to support the tool 900 within the liner 10 and also helps to resist axial movement of the gasket sealing elements 450A-B with respect to the liner 10 when the gasket sealing elements 450A-B are subjected to high pressure differential.
In one embodiment, an anchoring seal assembly for creating a sealing portion and an anchoring portion between a first tubular section which is arranged within a second tubular section is provided. The anchor seal assembly includes an expandable annular member attached to the first tubular section. The annular member has an outer surface and an inner surface. The anchoring seal assembly additionally includes a sealing member arranged in a groove formed on the outer surface of the expandable annular member. The sealing member has one or more anti-extrusion spring strips embedded within the sealing member, wherein the outer surface of the expandable annular member adjacent to the groove includes a rough surface. The anchor seal assembly also includes an expansion sleeve having an inclined outer surface and an inner hole. The expansion sleeve is movable between a first position in which the expansion sleeve is arranged outside the expandable annular member and a second position in which the expansion sleeve is arranged inside the expandable annular member, in which the expansion sleeve is configured to radially expand the expandable annular member in contact with an inner wall of the second tubular section to create a sealing portion and an anchoring portion as the expansion sleeve moves from the first position to the second position.
In another embodiment, a method of creating a sealing portion and an anchoring portion between a first tubular section and a second tubular section is provided. The method includes the step of placing the first tubular section within the second tubular section. The first tubular section has an annular member with a groove and a rough external surface, in which a sealing member with at least one anti-extrusion strip is disposed within the groove and in which a space is formed between one side of the sealing member and one slot side. The method additionally includes the step of expanding the annular member radially outwardly, which causes the at least one anti-extrusion strip to move towards an interface area between the first tubular section and the second tubular section. The method also includes the step of launching the annular member into contact with an inner wall of the second tubular section to create a sealing portion and an anchoring portion between the first tubular section and the second tubular section.
In one embodiment, a seal assembly for creating a seal between a first tubular section and a second tubular section is provided. A sealing assembly includes an annular member attached to the first tubular section, the annular member having a groove formed on an external surface of the annular member. A sealing assembly additionally includes a sealing member disposed in the groove, the sealing member having one or more anti-extrusion strips. The sealing member is configured to be radially expandable outwardly in contact with an inner wall of the second tubular section by applying an outwardly directed force provided to an inner surface of the annular member. In addition, a seal assembly includes a defined space between the seal member and one side of the groove.
In one aspect, the space is configured to close with the expansion of the annular member. In another aspect, the space is configured to close completely with the expansion of the annular member. In an additional aspect, the portion of the sealing member is used to close the space. In an additional aspect, the one or more anti-extrusion bands comprise a first anti-extrusion band and a second anti-extrusion band. In yet an additional aspect, the first anti-extrusion member is embedded in a first side of the sealing member and the second anti-extrusion band is embedded in a second side of the sealing member. In another aspect, the first anti-extrusion strip and the second anti-extrusion strip are springs. In an additional aspect, the first anti-extrusion strip and the second anti-extrusion strip are configured to move towards the first interface area and a second interface area between the annular member and the second tubular section with the expansion of the annular member. In a further aspect, the first interface area is adjacent to a first side of the groove and the second interface area is adjacent to a second side of the groove.
In one aspect, the sealing member is configured to move within the space with the expansion of the sealing member. In another aspect, a second space is defined between the sealing member and the other side of the groove. In an additional aspect, a leaning member disposed within the space. In a further aspect, a plurality of cuts are formed on an internal surface of the annular member. In another aspect, the annular member is a coating hanger. In yet an additional aspect, the annular member is a packer.
In another embodiment, a method of creating a seal between a first tubular section and a second tubular section is provided. The method includes the step of positioning the first tubular section within the second tubular section, the first tubular section having an annular member with a groove, in which a sealing member with at least one anti-extrusion strip is disposed within the groove and in which a space is formed between one side of the sealing member and one side of the groove. The method additionally includes the step of expanding the annular member radially outward, which causes the first anti-extrusion band and the second anti-extrusion band to move towards a first interface area and a second interface area between the annular member and the second tubular section. The method also includes the step of launching the sealing member in contact with an inner wall of the second tubular section to create the seal between the first tubular section and the second tubular section.
In one aspect, the space is closed between the sealing member and the groove with the expansion of the annular member. In another aspect, the space is closed by filling the space with the portion of the sealing member. In an additional aspect, an expansion tool is launched inside the annular member to expand the annular member radially outwards. In an additional aspect, the expansion tool is removed from the annular member after the expansion operation. In yet another aspect, the expansion tool remains within the annular member after the expansion operation.
In yet another embodiment, a seal assembly for creating a seal between a first tubular section and a second tubular section is provided. A seal assembly includes an annular member attached to the first tubular section, the annular member having a groove formed on an external surface thereof. A sealing assembly additionally includes a sealing member arranged in the groove of the annular member so that one side of the sealing member is spaced from one side of the groove, the sealing member having one or more anti-extraction strips, wherein the one or more anti-extrusion strips move towards an interface area between the annular member and the second tubular section with the expansion of the annular member.
In one aspect, the one or more anti-extrusion bands comprise a first anti-extrusion band and a second anti-extrusion band. In another aspect, the first anti-extrusion strip and the second anti-extrusion strip are configured to move in an annular space formed between the annular member and the second tubular section after expansion of the annular member due to the bottom pressure of the well. In a further aspect, at least one side of the sealing member is attached to the groove by means of glue.
In an additional modality, a suspension set is provided. The suspension assembly includes an expandable annular member having an outer surface and an inner surface. The suspension assembly additionally includes a sealing member arranged in a groove formed on the outer surface of the expandable annular member, the sealing member having one or more anti-extrusion spring strips embedded within the sealing member. The suspension assembly also includes an expansion sleeve having an inclined outer surface and an internal orifice. The expansion sleeve is movable between a first position in which the expansion sleeve is arranged outside the expandable annular member and a second position in which the expansion sleeve is arranged inside the expandable annular member. The expansion sleeve is configured to radially expand the expandable annular member as the expansion sleeve moves from the first position to the second position.
In one aspect, a space formed between one side of the sealing member and one side of the groove that is configured to close as the expansion sleeve moves from the first position to the second position. In another aspect, a second sealing member disposed in a second groove formed on the inner surface of the expandable annular member, the second sealing member having one or more anti-extrusion spring strips embedded within the sealing member. In another aspect, the second sealing member is configured to create a seal with the expansion sleeve.
Although the aforementioned is directed to the modalities of the present invention, further additional modalities of the present invention can be envisaged without departing from the basic scope thereof, and the basic scope thereof is determined by the following claims.

权利要求:
Claims (18)
[0001]
1. Anchor seal assembly (150, 205, 220, 240, 260, 550) configured to create a seal and anchor between a first tubular section and a second tubular section, the anchor seal assembly (150, 205, 220, 240, 260, 550) being characterized by the fact that it comprises: an expandable annular member disposed around the first tubular section, the annular member having a groove formed on an external surface of the expandable annular member; a sealing member disposed in the groove, the sealing member having one or more anti-extrusion spring strips embedded within the sealing member; and the expandable annular member being movable on an inclined outer surface of the first tubular section, where the inclined outer surface is configured to radially expand the expandable annular member in contact with an inner wall of the second tubular section to create the seal and anchorage to the as the expandable annular member moves from a first radially retracted position to a second radially expanded position, and a defined space between one side of the groove and one side of the sealing member, where the space is configured to close with expansion of the expandable annular member.
[0002]
2. Method of creating a seal and anchoring between a first tubular section and a second tubular section, the method characterized by the fact that it comprises the steps of: positioning the first tubular section within the second tubular section, the first tubular section having a member annular with a groove formed on an outer surface, a sealing member with at least one anti-extrusion strip disposed within the groove, and a space between one side of the sealing member and one side of the groove; expand the annular member radially outwardly so that the space closes and at least one anti-extrusion strip moves towards an interface area between the first tubular section and the second tubular section; launch the annular member in contact with an inner wall of the second tubular section to create the seal and anchorage between the first tubular section and the second tubular section.
[0003]
3. Anchorage seal assembly (150, 205, 220, 240, 260, 550), according to claim 1, characterized by the fact that each anti-extrusion strip is embedded along an outer edge of the corresponding expandable annular member.
[0004]
4. Anchorage seal assembly (150, 205, 220, 240, 260, 550), according to claim 1, characterized by the fact that the anti-extrusion strips are springs.
[0005]
5. Anchorage seal assembly (150, 205, 220, 240, 260, 550), according to claim 1, characterized by the fact that the external inclined surface is a wall of the first tubular section.
[0006]
6. Anchorage seal assembly (150, 205, 220, 240, 260, 550) according to claim 1, characterized in that the expandable annular member includes an anchoring portion disposed on an external surface of the annular member expandable adjacent to the slot.
[0007]
7. Anchorage seal assembly (150, 205, 220, 240, 260, 550) according to claim 6, characterized by the fact that the anchoring portion engages the inner surface of the second tubular section to create an anchor between the first tubular section and the second tubular section when the expandable annular member is in the second position.
[0008]
8. Anchorage seal assembly (150, 205, 220, 240, 260, 550), according to claim 1, characterized in that a second sealing member is disposed on an internal surface of the expandable annular member.
[0009]
9. Anchorage seal assembly (150, 205, 220, 240, 260, 550), according to claim 5, characterized by the fact that the expandable annular member is movable between the first position in which a portion of the first section tubular comprises a first thickness and the second position in which a second portion of the first tubular section comprises a second thickness greater than the first thickness.
[0010]
10. Anchorage seal assembly (150, 205, 220, 240, 260, 550), according to claim 1, characterized by the fact that the expandable annular member includes a rough surface adjacent to the groove.
[0011]
11. Anchorage seal assembly (150, 205, 220, 240, 260, 550), according to claim 10, characterized by the fact that the rough surface is configured to penetrate the inner wall of the second tubular section and create the anchoring.
[0012]
12. Anchorage seal assembly (150, 205, 220, 240, 260, 550), according to claim 10, characterized by the fact that the rough surface is serrated.
[0013]
13. Anchorage seal assembly (150, 205, 220, 240, 260, 550), according to claim 10, characterized by the fact that the rough surface includes carbide insertion devices.
[0014]
14. Method of creating a seal and an anchorage between a first tubular section and a second tubular section, according to the vindication king 2, characterized by the fact that the step of expanding the annular member radially outward also comprises moving the member annular along an inclined outer surface of the first tubular section.
[0015]
15. Method of creating a seal and anchoring between a first tubular section and a second tubular section, according to vindication 2, characterized by the fact that: the annular member includes a portion having a rough surface; and the anchoring is created by coupling the rough surface in contact with the inner surface of the second tubular section.
[0016]
16. Method of creating a seal and anchoring between a first tubular section and a second tubular section, according to vindication 2, characterized by the fact that the rough surface penetrates the inner surface of the second tubular section.
[0017]
17. Method of creating a seal and anchoring between a first tubular section and a second tubular section, according to claim 15, characterized by the fact that the rough surface is serrated.
[0018]
18. Method of creating a seal and anchoring between a first tubular section and a second tubular section, according to claim 15, characterized by the fact that the rough surface includes carbide insertion devices.

类似技术:

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公开号 | 公开日 | 专利标题

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BR112013020850B1|2021-03-02|anchor seal assembly and method of creating a seal and anchor between a first tubular section and a second tubular section

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同族专利:

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公开号 | 公开日

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US20170191342A1|2017-07-06|

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AU2016204895B2|2017-06-29|

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CA2827462C|2016-01-19|

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EP2675990A2|2013-12-25|

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WO2012112825A3|2013-03-07|

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US9920588B2|2018-03-20|

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WO2012112825A2|2012-08-23|

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CA2827462A1|2012-08-23|

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US9567823B2|2017-02-14|

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AU2012217608A1|2013-10-03|

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BR112013020850A2|2016-10-18|

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AU2012217608B2|2016-05-12|

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US20120205873A1|2012-08-16|

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AU2016204895A1|2016-08-04|

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法律状态:
2017-07-18| B25A| Requested transfer of rights approved|Owner name: WEATHERFORD TECHNOLOGY HOLDINGS LLC (US) |

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2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|

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2019-10-29| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|

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2020-05-26| B06G| Technical and formal requirements: other requirements|

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2020-10-06| B07A| Technical examination (opinion): publication of technical examination (opinion)|

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2020-12-22| B09A| Decision: intention to grant|

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2021-03-02| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 16/02/2012, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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US13/029,022|US9528352B2|2011-02-16|2011-02-16|Extrusion-resistant seals for expandable tubular assembly|

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US13/029,022|2011-02-16|

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US201161563016P| true| 2011-11-22|2011-11-22|

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US61/563,016|2011-11-22|

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PCT/US2012/025533|WO2012112825A2|2011-02-16|2012-02-16|Anchoring seal|

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