• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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    • 专利摘要:
    fracturing system and adjustment joint The present invention relates to an adjustable fracturing system (10) is provided. the system includes an adjustment joint (60, 62, 64, 130, 170, 224) configured to be varied in length to facilitate coupling a frac manifold (22) to a frac tree (20). in one modality, the system may also include the fracturing manifold and fracturing tree. additional systems, devices, and methods are also described.
    公开号:BR112014006988B1
    申请号:R112014006988-3
    申请日:2012-09-21
    公开日:2021-06-22
    发明作者:Kirk P. Guidry；James D. Cavanagh；Brandon B. Shirley
    申请人:Cameron Technologies Limited；
    IPC主号:
    专利说明:

    BACKGROUND
    [001] This section is intended to introduce the reader to various aspects of the technique that may be related to various aspects of the modalities described herein. This discussion is believed to be useful in providing the reader with fundamental information to facilitate a better understanding of the various aspects of the present modalities. Accordingly, it is to be understood that these statements are to be read in this light, and not as admissions of the prior art.
    [002] In order to meet consumer and industrial demand for natural resources, companies often invest significant amounts of time and money in researching and extracting oil, natural gas, and other underground resources from the earth. Specifically, once a desired underground resource is discovered, drilling and production systems are often employed to access and extract the resource. These systems can be located onshore and offshore depending on the location of a desired resource. Also, such systems often include a wellhead assembly through which the resource is extracted. These wellhead assemblies can include a wide variety of components, such as various liners, valves, fluid conduits, and the like, that control drilling or extraction operations.
    [003] In addition, such wellhead assemblies can utilize a frac tree and other components to facilitate a fracturing process and improve the production of a well. As will be appreciated, resources such as oil and natural gas are generally extracted from fissures or other cavities formed in various rock formations or underground strata. To facilitate the extraction of such resources, a well can be subjected to a fracturing process that creates one or more man-made fractures in a rock formation. This facilitates, for example, coupling of pre-existing cracks and cavities, allowing oil, gas, or the like to flow into the wellbore. Such fracturing processes typically include injecting a fracturing fluid - which is often a mixture that includes sand and water - into the well to increase the pressure of the well and form man-made fractures. A frac manifold can supply fracturing fluid to one or more fracturing trees through frac lines (eg pipes). But frac collectors and associated frac trees are typically large and heavy, and can be mounted to other equipment in a physical location, making adjustments between the frac collector and a frac tree difficult. SUMMARY
    [004] Certain aspects of some of the modalities described here are presented below. It is to be understood that these aspects are presented merely to provide the reader with a brief summary of certain forms that the invention could take and these aspects are not intended to limit the scope of the invention. Indeed, the invention may encompass a variety of aspects which may not be discussed below.
    [005] The modalities of the present description generally refer to adjustable fracturing systems that facilitate the alignment and coupling of a fracturing manifold with a fracturing tree through a fluid connection. In one embodiment, a fracturing system includes one or more fit joints that each provide at least one degree of freedom in aligning a fluid connection with a fracturing manifold and fracturing tree. Fitting joints may be provided in the form of frac heads or in some other form, such as pipe connectors. More specifically, an adjustment joint in the frac system can include a dimension that can be varied by a user to facilitate the connection of the frac manifold and frac tree in an efficient manner (eg allowing the user to compensate for alignment issues unexpected during connection).
    [006] Various refinements of the characteristics noted above may exist in relation to various aspects of the present modalities. Additional features can also be incorporated into these various aspects as well. These refinements and additional features can exist individually or in any combination. For example, various features discussed below in connection with one or more of the illustrated embodiments may be incorporated into any of the above-described aspects of the present description alone or in any combination. Again, the brief summary presented above is intended only to familiarize the reader with certain aspects and contexts of some modalities without limitation to the subject matter claimed. BRIEF DESCRIPTION OF THE DRAWINGS
    [007] These and other features, aspects, and advantages of certain embodiments will be better understood when the following detailed description is read with reference to the accompanying drawings in which like characters represent equal parts throughout all drawings, in which:
    [008] FIG. 1 generally shows an adjustable fracturing system in accordance with an embodiment of the present description;
    [009] FIG. 2 is a diagram of the adjustable fracturing system of FIG. 1 with a frac manifold coupled to multiple frac trees in accordance with an embodiment of the present description;
    [0010] FIG. 3 is a perspective view of certain components of the adjustable fracturing system, including the fracturing manifold, a fracturing tree, and various adjustment joints in accordance with an embodiment of the present description;
    [0011] FIG. 4 is a perspective view of an adjustment joint in the form of a fracturing head in accordance with an embodiment of the present description;
    [0012] FIG. 5 is a cross section of the fracturing head of FIG. 4 in accordance with an embodiment of the present description;
    [0013] FIG. 5 generally shows the fracturing head of FIGS. 4 and 5 after adjusting the fracturing head to increase its length in accordance with an embodiment of the present description;
    [0014] FIG. 7 is a perspective view of an adjustment joint in the form of a fracturing head having inlet and outlet ports that are not axially aligned with one another in accordance with an embodiment of the present description;
    [0015] FIG. 8 is a partial cross-section of a frac head that includes a test port to allow an integrity test between two frac head seals in accordance with an embodiment of the present description;
    [0016] FIG. 9 is a cross-section of a fitting joint in the form of a tube connector having a length that can be varied in accordance with an embodiment of the present description;
    [0017] FIG. 10 is a cross section of another adjustment joint having a variable length according to an embodiment;
    [0018] FIG. 11 is an exploded view of the sectional adjustment joint of FIG. 10;
    [0019] FIGS. 12 and 13 show the adjustment joint of FIG. 10 in two stages of a process for increasing the length of the adjustment joint in accordance with an embodiment;
    [0020] FIG. 14 is a detail view of a seal and piston assembly of the adjustment gasket of FIG. 10; and
    [0021] FIG. 15 is a cross section of yet another fit joint in accordance with an embodiment. DETAILED DESCRIPTION OF SPECIFIC MODALITIES
    [0022] One or more specific embodiments of the present description will be described below. In an effort to provide a concise description of these modalities, all features of an actual implementation may not be described in the specification. It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with systems-related and business-related constraints, which can vary from one implementation to another. Furthermore, it should be appreciated that such a development effort could be complex and time-consuming, but would nevertheless be a routine design, fabrication, and manufacturing obligation for those skilled in the art having the benefit of this description.
    [0023] When introducing elements of various modalities, the articles "a", "an", "the", and "said" are intended to mean that there are one or more of the elements. The terms "comprising", "including", and "having" are intended to be inclusive and to mean that there may be additional elements other than the elements listed. Furthermore, any use of "top", "bottom", "above", "below", other directional terms and variations of these terms is for convenience, but does not require any specific guidance of the components.
    [0024] Observing FIGS. present, an example of a fracturing system 10 is provided in FIGS. 1 and 2 according to a modality, The fracturing system 10 facilitates the extraction of natural resources (eg oil or natural gas) from a well 2 through a well hole 14 and a wellhead 16. Specifically, by injecting a frac fluid in well 12, frac system 10 increases the number or size of fractures in a rock formation or strata to improve the recovery of natural resources present in the formation. In the presently illustrated embodiment, well 12 is a surface well accessed by wellhead equipment 16 installed at surface level (i.e., above ground 18). But it will be appreciated that natural resources can be extracted from other wells, such as platform or subsea wells.
    [0025] The fracturing system 10 includes various components to control the flow of a fracturing fluid into well 12. For example, the fracturing system 10 shown includes a fracturing tree 20 and a fracturing manifold 22. The tree fracturing tube 20 includes at least one valve which controls the flow of fracturing fluid into wellhead 16 and subsequently into well 12. Similarly, fracturing manifold 22 includes at least one valve which controls the flow of the fracturing. fracturing fluid to fracturing tree 20 by a conduit or fluid fitting 26 (eg tubes).
    [0026] Fracture collector 22 is mounted on at least one skid 24 (e.g., a rail mounted platform) to allow movement of frac collector 22 with respect to ground 18. As shown in FIG. 2, fracturing manifold 22 is connected to provide fracturing fluid for multiple fracturing trees 20 and wellheads 16. But it is noted that fracturing manifold 22 may instead be coupled to a single fracturing tree 20 in agreement total with the present techniques. In an embodiment in which the fracturing manifold 22 is coupled to multiple fracturing trees 20, a plurality of fracturing manifold 22 valves may be mounted on separate runners 24 to allow for variation in the spacing between the valves. And in at least some cases, as described in more detail below, such a configuration allows for easier alignment of the fluid connection 26 between fracturing manifold 22 and fracturing tree 20.
    [0027] Fracture fluid from a supply 28 is provided to the fracturing manifold 22. FIG. 1, a connector 30 receives fracturing fluid from supply 28 through a conduit or fluid connection 32 (e.g., tubes or hoses) and then transmits the fluid to fracturing manifold 22 via an underground conduit or connection. fluid 34 (eg tubes). In one embodiment, the fracturing fluid supply 28 is provided by one or more trucks that supply the fracturing fluid, connect to connector 30, and pump the fluid into fracturing manifold 22 through connector 30 and connections 32 and 34. In another embodiment, the fracturing fluid supply 28 is in the form of a reservoir from which the fluid can be pumped into the fracturing manifold 22. But any other suitable fracturing fluid sources and modes for transmitting such fluid to the fracturing collector can be used instead.
    [0028] A portion 40 of the fracturing system 10 is illustrated in FIG. 3 according to a modality. In the embodiment shown, portion 40 includes fracturing tree 20 and fracturing manifold 22, as well as a number of adjustment joints that allow alignment of the connecting line (i.e. fluid connection 26) between fracturing tree 20 and the fracturing manifold 22. Manifold 22 includes a conduit 42 that routes fracturing fluid to valves 44 and 46. These valves 44 and 46 are coupled to connecting blocks 48 and 50 of conduit 42 to receive fracturing fluid from the fluid supply 28 through connections 32 and 24. The fracturing fluid may then be routed through fluid connection 26 to a respective frac tree 20. Although the present embodiment includes two valves 44 and two valves 46, any other suitable number valves may instead be used to control the flow of fracturing fluid to fracturing shafts 20. Yet, although the fluid connection 26 shown includes a single fracturing path. flow or conduit (which may be a frac line with a 177.8 mm (seven inch) hole in one case) between frac line 20 and frac manifold 22, a frac system may include a larger number of conduits between the fracturing manifold and the fracturing tree in other modalities.
    [0029] Fracture tree 20 is provided in the form of a horizontal frac tree in FIG. 3, although other modalities may include a different style of frac tree (eg a vertical tree). The fracturing shaft 20 shown includes valves 52 for controlling the flow of fracturing fluid through a horizontal portion of the shaft 20. The shaft 20 also includes a master valve 54 for controlling the flow of fluids (e.g., fracturing fluids or fluids). of production) to or from attached wellhead 16 (FIG. 1), and a port 56 that allows access to wellhead 16 through master valve 54. In other embodiments, valve 54 may be omitted (e.g., in a composite tree arrangement with all integral valves in one block).
    [0030] Portion 40 of fracturing system 10 also includes extensible adjustment joints that facilitate the connection of fracturing manifold 22 to fracturing tree 20. In the presently illustrated embodiment, the adjustment joints are provided in the form of adjustable fracturing heads 60, 62, and 64 (also commonly referred to as "goat heads"), although other forms of adjustment joints are also envisioned and can be used in accordance with the present techniques. In operation, fracturing shaft 20 can be mounted in a fixed location (eg, coupled to wellhead 16). Fluid connection 26 is aligned and coupled between fracturing tree 20 and fracturing manifold 22. Fitting joints (eg, frac heads 60, 62, and 64 in FIG. 3) facilitate such alignment and coupling of the fluid connection allowing an operator to manipulate the position of the fluid connection 26 by changing a dimension (e.g., length or height) of the adjustment joint. By providing three adjustment joints, each with a different geometric axis of motion (ie, up and down, forward and backward, and left and right), adjustments can be made to help facilitate ease of movement. coupling of fracturing manifold 22 to fracturing tree 20.
    [0031] For example, conduit 42 includes a frac head 60 that can be extended or recessed (as represented by arrow 68) to vary the length of conduit 42 and the distance between valves 44 and 46 (which may be mounted on separate skids 24, as discussed above, to allow relative movement between valves 44 and 46). Such a variation also provides a first degree of freedom in aligning the fluid connection 26 between the fracturing shaft 20 and the fracturing manifold 22. In other words, the fit joint in conduit 42 allows for the distance between the sealing points of the fluid connection 26 on fracturing tree 20 and fracturing manifold 22 is varied in a first dimension.
    [0032] Similarly, the fluid connection 26 in FIG. 3 includes fracturing head 62 for varying the length of fluid connection 26 in a second dimension, as represented by arrow 70. Adjustability of fracturing head 62 provides a second degree of freedom in aligning the connection between fracturing tree 20 and fracturing manifold 22. In addition, portion 40 includes fracturing head 64 which is of variable length in a third dimension (as represented by arrow 72), thus providing a third degree of freedom in alignment of fluid connection 26 between the fracturing tree 20 and the fracturing manifold 22. These three degrees of freedom are provided by three adjustment joints that have different adjustment directions that are not parallel, and in some embodiments (such as in FIG. 3) the directions of adjustment are orthogonal to each other. In addition to these three translational degrees of freedom, one or more of the fit joints (eg, frac heads 60, 62, and 64) may also be rotated around their geometric axes, as indicated by arrows 69, 71, and 73, to provide rotational degrees of freedom. For example, the modality presented here provides six degrees of freedom (three translational and three rotational).
    [0033] Although large frac lines (eg with a 177.8 mm (seven inch) hole) are traditionally difficult to adjust between a frac manifold and a frac tree, the adjustability provided in the presently described system 10 allows large frac lines to be aligned and connected to such components more efficiently. Consequently, as shown in FIG. 3, a single fluid connection 26 can be provided in the form of a large hole frac line, rather than using multiple smaller hole frac lines between the fracturing manifold and a given fracturing tree.
    [0034] Although the presently presented embodiment includes three adjustment joints, it is noted that other embodiments may include fewer adjustment joints providing fewer degrees of freedom in aligning the fluid connection 26. For example, a single adjustment joint may be provided to give a translational degree of freedom (e.g., up and down, back and forth, or left and right) in the alignment of fracturing tree 20 and fracturing manifold 22 to fluid connection 26 .Or two adjustment joints can be provided to give two translational degrees of freedom. Such adjustment joints can also provide rotational degrees of freedom as noted above. Furthermore, multiple adjustment joints can be coaxially aligned to provide adjustability at different locations within system 10 (e.g., manifold 22 may include multiple coaxial adjustment joints).
    [0035] For clarity, only a single flow connection 26 and a single fracturing tree 20 (both of which receive fracturing fluid from valves 44) are shown in FIG. 3 as part of portion 40 of fracturing system 10. But it will be appreciated that fracturing system 10 may include additional fluid connections 26 and fracturing shafts 20 (see, for example, FIG. 2). For example, valves 46 may be coupled (eg through outlet 74) to another fluid connection 26 leading to a different fracturing tree 20 over another wellhead 16. In addition, conduit 42 may extend beyond the blocks ports 48 and 50 shown to route fracturing fluid to additional valves and associated fracturing shafts 20. And conduit 42 may include additional adjustment gaskets to permit movement of such additional valves relative to another portion of manifold 22, thereby facilitating the alignment of these valves with their associated fracturing trees 20.
    [0036] Fracture head 60, according to a modality, is illustrated in greater detail in FIGS. 4-6. In the embodiment shown, fracturing head 60 includes a body having a first portion 82 and second portion 84. Body portions 82 and 84 are configured to move with respect to one another to vary a dimension of the fracturing head and facilitate the connection of the fracturing manifold and fracturing tree 20 as described above. Fracture head 60 includes fluid ports 86 and 114 (FIG. 5) to transmit fluid through fracturing head 60. In some embodiments, such as when installed in fracturing system 10 in the manner shown in FIG. 3, fluid port 86 can be considered an outlet port and fluid port 114 can be considered an inlet port. In addition to the fluid port 86, the second body portion 84 includes a set of sleeves 88 and nuts 90 for connecting the fracturing head 60 to another component (e.g., through an API flange or other connector). Similarly, first body portion 82 includes bore holes 92 disposed in a flange 93 around fluid port 114 for mating with another component (e.g., also mated to an API flange through additional shackles and nuts or another connector) . The first body portion 82 includes an additional set of punch holes 95 positioned radially outwardly of the punch holes 92. The punch holes 95 are aligned with corresponding holes 97 in a flange 99 of the second body portion 84, and the first and second body portion 84 body portions 82 and 84 are secured together with slugs 94 (through holes 95 and 97) and nuts 96.
    [0037] As shown in FIGS. 5 and 6 a hole 98 extends through the fracturing head 60 between the fluid ports 86 and 114. The hole 98 may have a diameter similar or identical to that of the components coupled in the fluid ports 86 and 114, such as 177.8 mm (seven inches) in one mode (although other diameters can be used for hole 98 as well as other components). The hole can also be sized to match the inside diameter of the production casing within the well (ie, a full hole arrangement) to facilitate the passage of tools, plugs, or the like through the frac head 60. fracturing 60 includes an adjustment collar 100 that can be rotated over threads 104 by a user to translate collar 100 with respect to the body portion 82 or 84 of fracturing head 60 onto which the collar is threaded (i.e., the first body portion 82 in Figures 5 and 6). Movement of adjustment collar 100 allows adjustment of the length of fracturing head 60 and the distance between fluid ports 86 and 114. Specifically, as illustrated in FIG. 6, the nuts 96 can be loosened on the cases 94 and the adjustable collar 100 can be moved along the first body portion 82 to elongate the fracturing head 60. Thus, the length (or what may instead be considered the height) of frac head 60 can be varied to aid in the alignment and coupling of frac manifold 22 and frac tree 20 through fluid connection 26, as discussed above. Fracture head 60, as well as other fitting joints in system 10 (e.g., frac heads 62 or 62, tube connectors 130, 170, or 224 described below), can be constructed to allow any desired amount of variation in dimension. For example, the adjustment joints can be constructed to allow for a dimensional variation (eg elongation) of 177.8 mm (seven inches) in one modality, or 304.8 mm (twelve inches) in another modality, and 457 mm. .2 mm (eighteen inches) in yet another modality. Furthermore, it is noted that in addition to the translational and rotational degrees of freedom facilitated through the use of the presently described adjustment joints, an angular adjustment between the elements of the fracturing system 10 can be allowed through the inclusion of articulation joints or other suitable couplings .
    [0038] Fracture head 60 also includes various sealing elements to inhibit fluid leakage. For example, as shown, fracturing head 60 includes sealing elements 102, 106, 108, 110, and 112. The sealing elements are formed from any suitable material, such as an elastomer or metal. In one embodiment, seals 110 include CANH™ seals available from Cameron International Corporation of Houston, Texas. Also in one embodiment, movement of collar 100 preloads or energizes one or more of the frac head seals 60.
    [0039] As shown in FIG. 7, fracturing head 64 is generally similar to fracturing head 60 (and fracturing head 62, which is identical to fracturing head 60 in one embodiment) but includes a fluid port 86 on a side face of the fracturing portion. body 84 rather than on the top face. As illustrated in FIG. 3, such an arrangement allows fracturing head 64 to connect a fluid connecting tube 26 to fracturing shaft 20 with a hole bent at an angle (e.g., at a right angle) to change the direction of fluid flowing through. of fracturing head 64. And a dimension of fracturing head 64 can be varied in the same way as described above with respect to fracturing head 60, thereby facilitating the alignment and coupling of fracturing tree 20 and fracturing manifold 22 with fluid connection 26.
    [0040] In an embodiment illustrated in FIG. 8, a frac head (e.g., frac head 60, 62, or 64) includes seals 118 and 120 (instead of seal elements 106, 108 and 110) disposed within an annular space 122. Seals 118 and 120 are formed of any suitable material, and may include metallic CANH™ seals in one embodiment. Annular space 122 is limited by body portion 82, body portion 84, and adjustable collar 100. A test port 124 extends from annular space 122 (e.g., at a location between seals 118 and 120) to a outer surface of the body portion 84 to allow a connection of a pressure monitoring device to allow monitoring or testing of the integrity of seals 118 and 120.
    [0041] Although the fracturing system 10 adjustment joints have been described above in the form of frac heads, other modalities may use other adjustment joints in addition to, or in place of, frac heads. For example, one or more of the fracturing heads 60, 62, and 64 of FIG. 3 can be replaced by other adjustment joints in additional ways. An example of another adjustment joint is shown in FIG. 9 in the form of a tube connector 130. The connector 130 includes a first tubular member 132 and a second tubular member 134. The tubular members 132, and 134 may be tubes (e.g., from fluid connection 26 or conduit 42), or these can be coupled to tubes or other conduits in any suitable way. Opposite ends of the connector include an inlet and an outlet, which allow fracturing fluid to flow through the connector 130 through the holes or the members 132 and 134 themselves or other conduit tubes joined by the connector 130.
    [0042] Connector 130 is configured to allow relative movement between tubular members 132 and 134 to allow for variation in the length of connector 130. Like frac heads 60, 62, and 64, connector 130 can be constructed to allow any desired range of variation in length, such as a range of 177.8 mm (seven inches) or 304.8 mm (twelve inches). A number of seals 136, 138, and 140 are provided between tubular members 132 and 134. In one embodiment, seal 136 is an elastomeric seal and seals 136 and 140 are metallic CANH™ seals.
    The connector 130 also includes a collar 142 (which may also be referred to herein as a union nut 142) that cooperates with a flanged collar 154 to adjust the length of the connector 130. The union nut 142 may be coupled to the first tubular member 132 in any suitable mode. In the embodiment shown, threads 146 allow union nut 142 to be threaded onto tubular member 132. Union nut 142 includes an end 150 that engages collar 154 through threads 152, and rotation of union nut 142 makes causing collar 154 to move along the geometric axis of connector 130 with respect to tubular member 132. A flange 156 of collar 154 is coupled to a corresponding flange 158 of tubular member 134 by sleeves 160 and nuts 162. union nut 142 also causes second tubular member 134 to be moved relative to first tubular member 132, thereby allowing connector 130 to be lengthened or shortened through such an operation. Connector 130 may also include a test port 164 to allow monitoring of the integrity of seals 138 and 140 in a manner similar to that described above with respect to test port 124 (FIG. 8).
    [0044] In another embodiment generally shown in FIGS. 10-14, a fitting gasket or connector 170 includes a tubular member or inner tube 172 (which may also be referred to as a mandrel) that is received within a tubular member or outer tube 174. Like the other fitting gaskets above. As described, the ends of the inner and outer tubular members 172 and 174 may be connected to tubes or other components of a system (eg, the fracturing system 10). And similar to connector 130, the length of the adjustment joint 170 can be varied by extending or retracting the inner and outer tubular members 172 and 174 with respect to one another.
    [0045] The adjustment joint 170 includes an inlet port 176 and an outlet port 178 that allow any desired fluid (e.g., fracturing fluid) to pass through the adjustment joint through bore 180. As shown herein, the inlet port 176 is provided by inner tubular member 172 and outlet port 178 is provided by outer tubular member 174. But the orientation of gasket 170 could be reversed so that fluid enters bore 180 through port 178 and exits through of port 176.
    [0046] The outer tubular member 174 includes a collar 182 at one end to receive various components mounted between the inner and outer tubular members 172 and 174. In the presently presented embodiment, such components include a seal assembly 184 to seal between the tubular members internal and external, a piston 186, and a sealing bracket 188. Various retaining elements, provided herein in the form of retaining rings 190 and 192 and a flanged collar 194, retain the piston 186 within the collar 182. fluid ports 198 and 200 allow hydraulic actuation of adjustment gasket 170 (to vary its length) and hydraulic adjustment of seal assembly 184. Plugs 202 seal fluid ports 198 and 200 when not in use, and plugs can be removed to allow fluid to be pumped into adjustment joint 170 through ports 198 and 200. Any suitable fluid could be used to actuate adjustment joint 170 and the adjust the seal assembly 184. For example, a hydraulic control fluid could be used in some cases. And in others, such as in the field, grease pumps could be used. Indeed, with sufficient pressure the actuation and sealing adjustment could be carried out pneumatically.
    [0047] The components of the adjustment gasket 170 are generally shown in a disassembled state in FIG. 11. To assemble the adjustment gasket 170, the seal assembly 184 is inserted into the outer tubular member 174 through the collar 182, followed by the piston 186 and the seal bracket 188. The retaining ring 190 can then be threaded into the collar. 182 to retain the piston 186 and the seal bracket 188. The retaining ring 192 is positioned around the inner tubular member and the flanged collar 194 is threaded over the inner tubular member 172, which can then be inserted into the end with outer tubular member collar 174. Finally, retaining ring 192 can be threaded into collar 182 to pull inner and outer tubular members 172 and 174 together.
    [0048] The assembled adjustment joint 170 is shown in a recessed position in FIG. 10. The length of the adjustment gasket 170 can be increased by unscrewing the retaining ring 192 from the collar 182 and extending the inner tubular member 172 from the outer tubular member 174, as generally shown in FIG. 12. Furthermore, in some modes the adjustment joint is hydraulically actuated. That is, hydraulic pressure is applied to the adjustment joint (e.g., through fluid port 200 in the presently presented embodiment) to cause the inner and outer tubular members to move with respect to each other, resulting in a variation in length of the adjustment joint. Once the adjustment gasket 170 has been changed to the desired length, the flanged collar 194 can be rotated around the inner tubular member 172 to engage with the piston 186 and the retaining ring 192 can be threaded into the collar 182 to retain the flanged collar 194 and the inner tubular member 172 in their fitted positions, as generally shown in FIG. 13.
    [0049] In at least some embodiments, hydraulic pressure is also used to adjust the seal assembly seals 184 between the inner and outer tubular members 172 and 174. As illustrated in FIG. 14, seal assembly 184 includes seals 206 and 208 with spacers 210. More specifically seals 206 and 208 are shown as a pair of metal CANH™ seals with each seal including inner and outer seal rings. But other types of seals could also be used, and the seal assembly could include any desired number of seals.
    [0050] Plug 202 can be removed from fluid port 198 to pump hydraulic fluid into the annular space limited by piston 186, seal bracket 188, and interior collar 182. Seals 214 are provided inside piston 186 and seal bracket 188 to inhibit leakage of hydraulic fluid from the annular space. In addition, the pressurized fluid within the annular space drives the piston 186 into the seal 206. The slanted interface of the seal rings 206 causes the seal rings to press against the inner and outer tubular members 172 and 174 in response to the load applied by piston 186. Similarly, the hydraulic adjustment force on piston 186 is also transmitted from seal 206 to seal 208 through an intervening spacer 210, thereby also causing the seal rings of seal 208 to press against the members. inner and outer tubulars 172 and 174. The flanged collar 194 and retaining rings 190 and 192 generally retain the various components within the collar 182, and each of these devices is connected to one of the inner or outer tubular members 172 and 174 through a respective threaded interface 216, 218, or 220. In addition, the seals of the seal assembly 184 can be hydraulically adjusted at various desired times during the installation. tion or gasket fit 170. For example, the seals could be fitted with retaining ring 192 and flanged collar 194 removed from collar 182 (as in FIG. 12), or these could be fitted with one or both of the retaining ring 192 and the flanged collar 194 threaded into place within the collar 182.
    [0051] Another adjustment gasket 224 is shown in FIG. 15 according to an additional modality. The adjustment gasket 224 is similar to the adjustment gasket 170 described above, and is shown as also having a seal assembly 184, a piston 186, a seal bracket 188, retaining rings 190 and 192, and a flanged collar 194. But some of these components in the adjustment joint 224 differ geometrically from their counterparts in the adjustment joint 170 to allow the adjustment joint 224 to have a lower profile (i.e., it is thinner). Fluid ports 198 and 200 on adjustment joint 224 also allow for hydraulic actuation of gasket 224 and hydraulic adjustment of seal assembly 184. Further, it will be appreciated that any of the adjustment joints described above could have additional fluid ports , such as test ports or bleed ports.
    [0052] Although aspects of the present description may be susceptible to various modifications and alternative forms, specific embodiments have been shown by way of example in the drawings and have been described in detail herein. But it should be understood that the invention is not intended to be limited to the specific forms described. Rather, the invention shall cover all modifications, equivalents, and alternatives that fall within the scope of the invention as defined by the following appended claims.
    权利要求:
    Claims (19)
    [0001]
    1. System (10), comprising: a fracturing manifold (22); a plurality of frac trees (20); and a plurality of fluid conduits coupled between the fracturing manifold (22) and the plurality of fracturing trees (20) to allow receipt of fracturing fluid by the plurality of fracturing trees (20) of the fracturing manifold (22) , characterized in that each fracturing tree of the plurality of fracturing trees (20) coupled to the fracturing manifold (22) is coupled to the fracturing manifold (22) by at least one rigid fluid conduit of the plurality of fluid conduits , so as to provide one and only one rigid fluid path from the fracturing manifold (22) to the fracturing tree, and the one and only rigid fluid path is not coupled to the fracturing manifold (22) to supply the fracturing fluid. fracturing the fracturing manifold (22) to any other fracturing tree.
    [0002]
    2. System according to claim 1, characterized in that it comprises a first frac head (60) in the fracturing manifold (22) and a second frac head (62) in a frac tree among a plurality of trees of fracturing (20), in which the first fracturing head (60) and the second fracturing head (62) are in fluid communication with each other.
    [0003]
    3. System according to claim 1, characterized in that the billing manifold includes: a shared main conduit to route the fracturing fluid to multiple fracturing trees of the plurality of fracturing trees (20); and outlet branches to route fracturing fluid from the shared main conduit to individual frac trees of multiple frac trees.
    [0004]
    4. System according to claim 3, characterized in that the fracturing manifold outlet branches (22) include valves (44, 46) to individually control the flow of fracturing fluid from the shared main conduit to the multiple trees of fracturing.
    [0005]
    5. System according to claim 4, characterized in that the outlet branches of the fracturing manifold (22) include: a first outlet branch having two valves (44) connected in series to control the flow of fracturing fluid to a first frac tree of the multiple frac trees; and a second outlet branch with two valves (46) connected in series to control the flow of fracturing fluid to a second frac tree of the multiple frac trees.
    [0006]
    6. System according to claim 5, characterized in that the first outlet branch of the fracturing manifold (22) includes a fracturing head (62) connected in series with the two valves (44) of the first outlet branch , so that, in operation, the fracturing fluid can be routed from the shared main conduit through the two valves (44) of the first outlet branch to the fracturing head (62).
    [0007]
    7. System according to claim 1, characterized in that the at least one rigid fluid conduit includes a plurality of pipe joints coupled together.
    [0008]
    8. System according to claim 7, characterized in that in which at least one rigid fluid conduit includes an elbow.
    [0009]
    9. System according to claim 1, characterized in that at least one rigid fluid conduit is an adjustable fluid conduit that allows the operator to vary a dimension of the fluid conduit to facilitate the coupling of the fluid conduit between the collector of fracturing (22) and a fracturing tree of the plurality of fracturing trees (20).
    [0010]
    10. System according to claim 1, characterized in that at least one rigid fluid conduit includes an adjustment joint (60, 62, 64, 130, 170, 224) that provides at least one degree of translational freedom in the alignment of at least one rigid fluid conduit between the fracturing manifold (22) and a fracturing tree of the plurality of fracturing trees (20).
    [0011]
    11. System (10), comprising: a fracturing fluid distribution manifold for supplying fracturing fluid to a plurality of wells, the fracturing fluid distribution manifold including a main line and multiple outlet branches in fluid communication with the main line to route the fracturing fluid from the main line towards the plurality of wells through the multiple output branches, wherein the multiple output branches include a first output branch and a second output branch, characterized in that the the first outlet branch includes a first pair of valves (44) connected in series to control the flow of fracturing fluid from the main line through the first outlet branch towards a first well of the plurality of wells and the second outlet branch includes a second pair of valves (46) connected in series to control the flow of fracturing fluid therefrom. r from the main line through the second output branch towards a second well of the plurality of wells, wherein the fracturing fluid distribution manifold is coupled to supply fracturing fluid from the main line to the first well by one and only one rigid fluid path and to supply fracturing fluid from the main line to the second well by one and only one additional rigid fluid path, the single rigid fluid path includes the first outlet branch, the single rigid fluid path includes the second outlet branch, and neither the single rigid fluid path nor the single additional rigid fluid path are connected to distribute fracturing fluid to more than one well of the plurality of wells.
    [0012]
    12. System (10) according to claim 11, characterized in that the multiple output branches are coupled to the main line in the main line connection blocks.
    [0013]
    13. System (10) according to claim 11, characterized in that the multiple outlet branches include at least one additional outlet branch and each additional outlet branch includes a pair of valves connected in series to control the flow of fracturing fluid from the main line through the additional output branch towards an additional well of the plurality of wells.
    [0014]
    14. System (10) according to claim 11, characterized in that it comprises a plurality of fracturing trees (20) coupled to receive fracturing fluid from the main line of the fracturing fluid distribution manifold through the multiple output branches.
    [0015]
    15. System (10) according to claim 11, characterized in that the first well is in fluid communication with the main line of the fracturing fluid distribution manifold through a fracturing head in the first output branch and at least one additional frac head.
    [0016]
    16. System according to claim 15, characterized in that the fracturing head in the first output branch is mounted on a valve of the first pair of valves.
    [0017]
    17. A method, comprising: assembling a fracturing manifold (22) having a main line to deliver fracturing fluid to multiple wells through multiple fracturing manifold outlets (22); characterized by connecting the fracturing manifold (22) to the multiple wells through rigid conduits positioned to receive fracturing fluid from the multiple outlets so that the rigid conduits, for each well of the multiple wells, provide one and only one fluid path for the fracturing fluid flows from the fracturing manifold (22) to the well, and the unique fluid path to each well is not shared by another well; and routing the fracturing fluid from the fracturing manifold (22) to the multiple wells through the rigid conduits.
    [0018]
    18. Method according to claim 17, characterized in that the fracturing manifold assembly (22) includes the fracturing manifold assembly (22) to include outlet branches with valves to control fluid flow lines from the main line to the multiple outlets and routing the fracturing fluid from the fracturing manifold (22) to the multiple wells through the rigid conduits include operating the outlet branch valves to control the flow of fracturing fluid to the multiple wells through the rigid conduits.
    [0019]
    19. The method of claim 18, characterized in that mounting the fracturing manifold (22) to include outlet branches with valves to control the flow of fracturing fluid from the main line to the multiple outlets includes providing at least one outlet branch which is in fluid communication with the main line and which includes: a first valve coupled to the main line, a second valve connected downstream of the first valve and a fracturing head connected downstream of the second valve.
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    同族专利:
    公开号 | 公开日
    EP2758630B1|2018-03-28|
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    MX2014003464A|2015-04-08|
    US9631469B2|2017-04-25|
    CN104114810B|2017-06-06|
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    BR112014006988A2|2017-10-31|
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    CA2849719C|2020-01-07|
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    US20140246211A1|2014-09-04|
    CA2849719A1|2013-03-28|
    WO2013043995A3|2014-05-15|
    SG10201509549TA|2016-01-28|
    EP3067515B1|2018-11-14|
    CN104114810A|2014-10-22|
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    法律状态:
    2018-10-23| B25A| Requested transfer of rights approved|Owner name: CAMERON TECHNOLOGIES LIMITED (NL) |
    2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-11-19| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-12-29| B07A| Technical examination (opinion): publication of technical examination (opinion) [chapter 7.1 patent gazette]|
    2021-05-04| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-06-22| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 21/09/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/243,252|2011-09-23|
    US13/243,252|US8978763B2|2011-09-23|2011-09-23|Adjustable fracturing system|
    PCT/US2012/056520|WO2013043995A2|2011-09-23|2012-09-21|Adjustable fracturing system|
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