• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    ANNULAR BARRIER WITH PRESSURE AMPLIFICATION. The present invention relates to an annular barrier to be expanded in a ring between the tubular structure of the well and an inner wall of a well hole to provide isolation of the zone between a first zone and a second zone of the well hole, comprising the tubular part to mount as part of the tubular structure of the well and having an expansion opening, an expandable sleeve surrounding the tubular part, each end of the expandable sleeve being connected with the tubular part, and an annular barrier space between the tubular part and the expandable sleeve, wherein the annular barrier further comprises a pressure intensifying means having an inlet at a first end in fluid communication with the expansion opening and having an outlet at a second end in fluid communication with a barrier space cancel.
    公开号:BR112014002957B1
    申请号:R112014002957-1
    申请日:2012-08-30
    公开日:2021-03-16
    发明作者:Jørgen Hallundbæk；Paul Hazel；Ricardo Reves Vasques
    申请人:Welltec Oilfield Solutions Ag；
    IPC主号:
    专利说明:

    Field of invention
    [0001] The present invention relates to an annular barrier arranged in a well hole to provide isolation of the zone between a first zone and a second zone. In addition, the present invention relates to an annular barrier system as well as a method of arranging an annular barrier in a ring and a method of using annular barriers in a ring to seal an inlet flow control section. Background
    [0002] In well holes, annular barriers are used for different purposes, such as to provide an insulation barrier. An annular barrier has a tubular part mounted as part of the tubular structure of the well, such as the production liner, which is surrounded by an expandable annular sleeve. The expandable sleeve is typically made of an elastomeric material, but it can also be made of metal. The glove is attached at its ends to the tubular part of the annular barrier.
    [0003] In order to seal the zone between the tubular structure of the well and the well bore or an internal or an external tubular structure, the second annular barrier is used. The first annular barrier is expanded on one side of the zone to be sealed, and the second annular barrier is expanded on the other side of that zone, and thus, the zone is sealed.
    [0004] The pressure envelope of a well is governed by the nominal bursting capacity of the tubular and well hardware, etc. used inside the well construction. In some circumstances, the expandable sleeve of an annular barrier can be expanded by increasing the pressure within the well, which is the most cost-effective way to expand the sleeve. The nominal bursting capacity of a well defines the maximum pressure that can be applied to the well to expand the sleeve, and it is desirable to minimize the expansion pressure necessary to expand the sleeve in order to minimize the exposure of the well to the expansion pressure.
    [0005] When expanded, annular barriers can be subjected to continuous pressure or periodic high pressure from the outside, either in the form of hydraulic pressure within the well environment or in the form of formation pressure. In some circumstances, said pressure can cause the annular barrier to collapse, which can have serious consequences for the area that must be sealed by the barrier as the sealing properties are lost due to collapse.
    [0006] Current needs for nominal collapse capacity have led to the use of increasingly higher expansion pressures. However, not only is the rated burst capacity affected by increasing expansion pressures, but also the variety of downhole tools can become ineffective or stop working under high pressures. Therefore, some wells are limited to the expansion pressure used in the well to protect the tools and instruments present in the well. The problem can be overcome by decreasing the thickness or strength of the expandable sleeve. However, this impairs the rated collapse capacity. Summary of the invention
    [0007] It is an objective of the present invention to completely or partially overcome the disadvantages and drawbacks above the prior art. More specifically, it is an objective to provide an annular barrier being expandable without damaging other components at completion and without reducing the nominal collapse capacity of the annular barrier.
    [0008] The above objectives, together with numerous other objectives, advantages, and characteristics, which will become evident from the description below, are realized by a solution according to the present invention by an annular barrier to be expanded in a ring between the tubular structure of the well and an inner wall of a well hole to provide isolation of the zone between a first zone and a second zone of the well hole, comprising: - a tubular part for mounting as part of the tubular structure of the well and having a expansion opening, - an expandable sleeve surrounding the tubular part, each end of the expandable sleeve being connected to the tubular part, and- an annular barrier space between the tubular part and the expandable sleeve, wherein the annular barrier additionally comprises a means pressure intensifier having an inlet at a first end in fluid communication with the expansion port and having an outlet at a second end in communication of fluid with an annular barrier space, and in which a pressure intensifying means comprises a piston having a first end and a second end, the piston being slidably arranged within a piston housing, the piston housing comprising a first cylinder having a first diameter adapting to a first piston end and having a first end surface area, and a second cylinder having a second diameter adapting to a second piston end and having a second end surface area, a first end surface area being larger than a second end surface area, and in which a pressure intensifying means additionally comprises a supply fluid connection to allow fluid to enter the second cylinder, and in which a pressure intensification means additionally comprises a first one-way safety valve arranged in the con exon supply fluid to prevent fluid from leaving a second cylinder during compression of the fluid by the piston and to allow fluid to enter the second cylinder during decompression of the fluid by the piston.
    [0009] In the middle of pressure intensification you can additionally comprise a second one-way safety valve arranged between the supply fluid connection and the outlet of a pressure intensifier to prevent pressurized fluid from entering a second cylinder during decompression. of the fluid by the piston and to allow the pressurized fluid to exit a pressure intensifying medium through the outlet during the compression of the fluid by the piston.
    [00010] In one embodiment, a pressure intensifying means may comprise a piston having a first end and a second end, the piston being slidably arranged within a piston housing, and a first end of the piston may have a first end surface area greater than a second end surface area of a second piston end.
    [00011] In another embodiment, a pressure intensifying means may comprise a piston having a first end and a second end, the piston being slidably arranged within a piston housing, and a first end of the piston may have a first end surface area greater than a second end surface area of a second piston end, and the piston housing may comprise two cylinders; a first cylinder having a first diameter adapting to a first piston end and a second cylinder having a second diameter smaller than a first diameter and adapting to a second piston end.
    [00012] Also, a pressure intensifying means may comprise a plurality of pressure intensifying means.
    [00013] Furthermore, a means of intensifying pressure may comprise a plurality of pistons.
    [00014] Additionally, the outlet of a pressure intensifying means may comprise a pressure collecting chamber in fluid communication with a plurality of second ends of the plurality of pistons and in fluid communication with an annular barrier space.
    [00015] Additionally, a surplus fluid connection between a pressure intensifying medium and the well bore can allow the fluid to flow from a pressure intensifying medium into the well bore.
    [00016] In one embodiment, a pressure intensifying means may comprise a space within the piston housing between a first end and a second end of the piston.
    [00017] The said space can be pressurized before use with atmospheric pressure.
    [00018] The annular barrier as described above can additionally comprise a one-way valve arranged in fluid communication with the outlet of a pressure intensifying medium and an annular barrier space, prohibiting the flow of fluid from the barrier space annul towards a pressure intensifying means.
    [00019] The annular barrier as described above can also comprise a one-way valve arranged in fluid communication with the well bore and an annular barrier space, allowing the flow of fluid from the well bore into a space annular barrier.
    [00020] Also, the annular barrier according to the present invention can comprise a first and a second pressure intensifying means arranged in series, a first pressure intensifying means comprising a first inlet and a first outlet and a first inlet being in fluid communication with the expansion port, a second pressure intensifying means comprising a second inlet and a second outlet and a second outlet being in fluid communication with an annular barrier space.
    [00021] Additionally, the annular barrier may comprise a first and a second pressure intensifying means and at least one intermediate pressure intensifying means arranged in series, a first pressure intensifying means comprising a first inlet and a first outlet and a first inlet being in fluid communication with the expansion opening, a second pressure intensifying means comprising a second inlet and a second outlet and a second outlet being in fluid communication with an annular barrier space, and the at least one intermediate pressure intensification means can comprise an intermediate inlet in fluid communication with a first outlet and an intermediate outlet being in fluid connection with the second inlet.
    [00022] Various intermediate pressure intensifying means may be arranged in series, and the neighboring intermediate pressure intensifying means may comprise intermediate outputs being in fluid communication with the intermediate inlets.
    [00023] In one embodiment, a pressure intensifying means may comprise a hydraulic pressure intensifier.
    [00024] Furthermore, the hydraulic pressure intensifier can comprise a first cylinder having the first internal area of cross section at a first end of a pressure intensifying means and a second cylinder having the second internal area of cross section at a second end of a pressure intensifying means.
    [00025] Additionally, the hydraulic pressure intensifier can comprise a pilot control valve to control the fluid communication between the first cylinder, the input of a pressure intensification medium and an excess fluid connection that provides fluid communication from from a pressure-intensifying means to the well bore, the pilot control valve having two positions; the first position in which fluid communication is provided between a first cylinder and the entrance of a pressure intensifying means to apply expansion fluid to a first cylinder during pressurization and the second position that provides fluid communication between a first cylinder and the connection of excess fluid during the retraction of the piston, allowing the expansion fluid to leave the first cylinder, and in which the pilot control valve can be switched between said first and second positions by a pilot.
    [00026] The hydraulic pressure intensifier can additionally comprise a first one-way safety valve and a second one-way safety valve, a first one-way safety valve allowing the expansion fluid to flow from the inlet of a pressure intensifying means into a second cylinder, but prohibits the intensified pressure fluid from flowing back from a second cylinder towards the entrance of a pressure intensifying means and the second one-way safety valve, allowing intensified pressure expansion fluid to flow from a second cylinder towards the outlet of a pressure intensifying medium and into an annular barrier space, but prohibits the intensified pressure fluid from flowing back from the annular barrier space towards a second cylinder.
    [00027] In one embodiment, the excess fluid connection may comprise a filter.
    [00028] Additionally, a pressure intensifying means may comprise a double-acting piston.
    [00029] A pressure intensifying means may comprise the double-acting piston additionally comprising a first and a second pilot control valve to control fluid communication between a first end and a second end of the first cylinder, a pressure control valve fluid direction and the first and second excess fluid connection that provides fluid communication from a pressure-intensifying means to the well bore, the first pilot control valve having two positions; the first position in which fluid communication is provided between a first end of a first cylinder and the fluid direction control valve to apply expansion fluid to a first end of the cylinder while pressurizing a second end of a second cylinder , and the second position in which fluid communication is provided between a first cylinder and the first excess fluid connection, and the second pilot control valve having two positions; the first position in which fluid communication is provided between a second end of a first cylinder and the fluid direction control valve to apply expansion fluid to a second end of a first cylinder during pressurization of a first end of a second cylinder, and the second position in which fluid communication is provided between a second end of a first cylinder and the second surplus fluid connection.
    [00030] Said fluid direction control valve can be controlled by a first and a second pilot, a first pilot determining when the piston reaches a stop position at a first end of a first cylinder and a second pilot determining when the piston reaches a stop position at a second end of the first cylinder.
    [00031] Also, a pressure intensifying means may comprise a hydraulic pressure intensifier with a double-acting piston.
    [00032] In one embodiment, a pressure intensifying means can comprise a pressurized gas, and the pressurized gas can be released within the annular barrier by releasing a gas control valve through the expansion fluid.
    [00033] Furthermore, a second pressure intensifying means can be arranged at one end of the annular barrier opposite a pressure intensifying means.
    [00034] The present invention additionally relates to an annular barrier system comprising: - the tubular structure of the well, and - at least one annular barrier according to any one of the preceding claims arranged as part of the tubular structure of the well.
    [00035] The present invention also relates to a method of arranging an annular barrier as described above in a ring, comprising the steps of: - connecting the annular barrier with the tubular structure of the well, - arranging the unexpanded annular barrier in a desired position at the bottom of the well, - pressurize a fluid within the tubular part, - intensify the pressure in an annular barrier space by means of pressure intensification, and- expand the expandable sleeve.
    [00036] Finally, the present invention relates to a method of using annular barriers as described above in a ring to seal a flow inlet control section, comprising the steps of: - connecting two annular barriers with the tubular structure of the well and between them a flow inlet control section, - arrange the two annular barriers and the flow inlet control section in a desired position at the bottom of the well, - pressurize the tubular part and expand the annular barriers by fluid pressurized expansion from within the tubular part to provide zone isolation between a first zone and a second zone of the borehole, the first zone having a first fluid pressure and the second zone having a second fluid pressure, - stop the pressurization of the tubular part, e- activate the flow inlet control section to start the production of the fluid inside the tubular structure of the well. Brief description of the drawings
    [00037] The present invention and its many advantages will be described in more detail below with reference to the attached schematic drawings, which for purposes of illustration show some non-limiting modalities in which Figure 1 shows an enlargement of an annular barrier in its condition unexpanded, Figure 2 shows a cross-sectional view along a longitudinal extension of an annular barrier in its unexpanded condition, Figure 3 shows a diagram of a hydraulic pressure intensifier, Figure 4 shows an annular barrier in the figure 1 in its expanded condition, Figure 5 shows a diagram of a hydraulic depression intensifier with a single-acting piston, Figure 6 shows a diagram of a hydraulic depression intensifier with a double-acting piston, Figure 7 shows a plurality of means of pressure intensification arranged in series, and Figure 8 shows an annular barrier system.
    [00038] All figures are highly schematic and not necessarily to scale, and they show only those parts that are necessary in order to elucidate the present invention, other parts being omitted or merely suggested. Detailed description of the present invention
    [00039] Figure 2 shows an annular barrier 1 arranged in a well hole 100 comprising a tubular part 2 to mount as part of the tubular structure of the well 300. The tubular part is surrounded by an expandable sleeve 3 and connected with the tubular part at both ends 31, 32 by connection means 50, thereby providing an annular barrier space 30 between the tubular part 2 and the expandable sleeve 3. The tubular part has an expansion opening 13 to allow an expansion fluid F1 penetrate the annular barrier in order to expand the expandable sleeve 3. The annular barrier additionally comprises pressure intensifying means 10 which, at its first end 10a, has an inlet 11 in fluid communication with the expansion opening and which , at its second end 10b, has an outlet 12 in fluid communication with an annular barrier space 30. The line 22 shown in figure 1 is the center line 22 of the annular barrier 1.
    [00040] By arranging a means of intensifying pressure between the expansion opening and an annular barrier space, the pressure provided within the well can be maintained at a certain level by other components or parts of the completion can resist, while increasing in a way expansion pressure within the annular barrier space. By just increasing the expansion pressure inside the annular barrier, the remaining part of the well can be pressurized to a much lower pressure than the expansion pressure in an annular barrier space needed to expand the expandable sleeve when assembling a barrier ring according to the present invention. Low pressure in the well is desirable for safety reasons, as some parts or components of the well will be damaged above a certain pressure, and in some types of wells that provide a high pressure it is almost impossible. Therefore, the ability to expand annular barriers at a lower pressure can provide a more versatile annular barrier suitable for more types of wells and annular barriers can be used in more types of wells. Also, the annular barrier can be used in wells capable of withstanding high pressures, as the annular barrier can be significantly resistant without requiring an additionally high rated burst capacity since an intensified pressure expansion fluid F2 can expand a much stronger annular barrier. The stronger annular barrier can therefore be more resistant to collapse, loss of sealing effect and corrosion.
    [00041] In figure 1, a one-way valve 64 is arranged in fluid communication with the well hole and an annular barrier space 30, thereby allowing the flow of fluid from the well hole into a space annular barrier 30. In order to guarantee a sudden high pressure in the well bore for example, due to a gas explosion, fluid from the well bore can be allowed to enter an annular barrier space 30 through the valve a track 64 to prevent the collapse of the barrier due to external pressure. In addition, an additional one-way valve can be arranged at the other end of the annular barrier (not shown) to allow fluid to enter the barrier from not only a first zone 102 but also a second zone 103 of the well bore.
    [00042] Both pistons and pistons can be used in various embodiments of the present invention. However, only the term piston will be used in the following to describe a moving element arranged in a cylinder to displace a fluid. Those skilled in the art know the advantages and disadvantages of using pistons or pistons.
    [00043] The annular barriers 1 according to the present invention are typically assembled to form part of the tubular structure of the well, such as a production liner, before lowering the tubular structure of the well 300 into the well-bottomed well hole . The tubular structure of the well 300 is constructed by the parts of the tubular structure of the well assembled as a column of long tubular structure of the well. The annular barriers 1 are mounted among other parts of the tubular structure of the well, such as the flow inlet control sections, fracture door section, etc. when assembling the column of the tubular structure of the well. The tubular part 2 can be connected with the parts of the tubular structure of the well, for example, by means of a threaded connection (not shown).
    [00044] The annular barrier 1 is used for a variety of purposes, all of which require the expandable sleeve 3 of the annular barrier 1 to be expanded so that the sleeve contacts the inner wall 200 of the well hole. The unexpanded sleeve has a cylindrical shape, and at its ends it is connected with the tubular part by means of connection 50. The expandable sleeve 3 is expanded by leaving the pressurized fluid through the expansion opening 9 of the tubular part through a pressure intensification means and into an annular barrier space 30 between the expandable sleeve 3 and the tubular part 2.
    [00045] Figure 2 shows a cross-sectional view along a longitudinal extension of an annular barrier in its unexpanded condition. As indicated by cutting through the middle of the annular barrier, the annular barriers are very long in the longitudinal direction of the barrier compared to the diameter of the barrier. The length of the barrier can be up to several meters, such as at least 5 or 10 meters while the diameter of the barrier is confined to a very limited space available in a well bore.
    [00046] Figure 3 shows a sectional view of a section of a pressure intensifying means 10, in which a pressure intensifying means 10 comprises a collection chamber 72 arranged as part of the outlet 12 in fluid communication with the plurality of second ends of the plurality of pistons and in fluid communication with an annular barrier space 30. The use of a plurality of pistons all leaving the fluid inside the collection chamber can avoid the effects of clogging since the risk of mechanical damage in a pressure intensifying means is distributed in a plurality of pistons. If one or more of the pistons clog, for example, due to large particles in the fluid, the rest of the pistons can still provide the necessary pressure.
    [00047] Figure 4 shows a cross-sectional view along a longitudinal extension of an annular barrier in its expanded condition. In addition, the annular barrier 1 comprises a second pressure intensifying means 10e. For constructional reasons, a second pressure intensifying means 10e can be arranged at one end of the annular barrier opposite a pressure intensifying means 10. Having pressure intensifying means 10, 10e at both ends of the annular barrier will not increase the pressure that can be reached within the annular barrier space 30. However, it can increase the speed at which the annular barrier is expanded.
    [00048] As explained above, space is very limited when operating at the bottom of the well. However, speed is another important factor that can reduce downhole operation time and thereby reduce the costs of downhole operations.
    [00049] Figure 5 shows a cross-sectional view of a modality of a hydraulic pressure intensifier. The hydraulic pressure intensifier 10 comprises a piston 60 having a first end 601 and a second end 602 and the piston being slidably arranged within a piston housing 61. A first end 601 of the piston has a first end surface area A1 greater than a second end surface area A2 of a second piston end 602 so as to be able to intensify the pressure applied to a first end surface area A1 at a higher pressure applied by a second surface area of A2 end to the fluid within an annular barrier space 30.
    [00050] The piston housing may comprise two cylinders, a first cylinder 65 having a first diameter adapting to a first end of the piston and a second cylinder 66 having a second diameter less than a first diameter adapting to a second end of the piston.
    [00051] A pressure intensifying means shown in figure 5 comprises a pilot control valve 67 for controlling the fluid communication between a first cylinder 65, the input of a pressure intensifying means 10 and an excess fluid connection 13 that provides fluid communication from a pressure-intensifying means to well bore 100 when the piston is retracted to drop a new amount of fluid into a second cylinder 66 having the smallest diameter. The pilot control valve has two positions. The first position allows fluid communication between a first cylinder and the entry of a pressure intensifying means to apply F1 expansion fluid to a first cylinder during pressurization and the second position allows fluid communication between a first cylinder and the excess fluid connection during piston retraction, allowing expansion fluid F1 to exit the first cylinder. The pilot control valve can be automatically switched between said first and second positions by a pilot 68 when the piston reaches its extreme positions at either end of the piston housing. In addition, a pressure intensifying means may comprise a first one-way safety valve 69 and a second one-way safety valve 63. A first one-way safety valve 69 allows the expansion fluid F1 to flow from the entry of a pressure intensifier 10 into a second cylinder 66, but prohibits the intensified pressure fluid F2 from flowing back from a second cylinder 66 towards the inlet 11 of a pressure intensifier. In this way, the high pressure side of a pressure intensifier can be fed by the expansion fluid from the inlet during retraction of the piston. The second one-way safety valve 63 allows the intensified pressure expansion fluid F2 to flow from a second cylinder towards the outlet 12 of a pressure intensifying medium and into an annular barrier space 30, but prohibits the intensified pressure fluid F2 from flowing back from the annular barrier space 30 towards a second cylinder. In this way, the intensified expansion fluid F2 can always enter an annular barrier space 30, but during the retraction of the piston, where a second cylinder is filled with low pressure expansion fluid, an intensified pressure expansion fluid will not flow back from the annular barrier space 30.
    [00052] In order to prevent fluids containing dirt particles from entering a pressure-intensifying medium through a surplus fluid connection 13, typically a filter 70 will be arranged in the surplus fluid connection during normal medium operation pressure intensification. However, only excess fluid will come out of the excess fluid connection into the well bore. However, under special circumstances, such as high pressure fluctuations in the well bore, the filter can become important to the environment within a pressure-intensifying medium.
    [00053] As shown in figure 5, there is a space 62 inside the piston housing between a first end and a second end of the piston, space 62 can be connected to the outside of a pressure intensifying means 10 through the second connection of pressure excess fluid 13c, and typically a second filter 70b will also be disposed in the second excess fluid connection 13c to prevent impurities near the movable piston 60.
    [00054] A pressure intensifying means 10 shown in figure 6 comprises a double-acting piston. In order to increase the speed / flow volume of a pressure intensifying medium compared to a pressure intensifying medium shown in figure 5, the principle of a double-acting piston can be used in a pressure intensifying medium. During the retraction of the piston shown in figure 5, a pressure intensifying means becomes inactive in terms of pressurization. By using a double-acting piston, not only the forward but also the backward movement when switching the piston can be used to pressurize, thereby avoiding any inactive periods and once again increasing the speed / volume of flow of a medium pressure intensification to allow the annular barrier to expand in a shorter period of time. Since technical characteristics, as explained, are necessary in systems with a double-acting piston, these systems are typically less harsh, and the choice between double-acting or single-acting piston is therefore a conflict between speed and harshness.
    [00055] A pressure intensifying means comprising a double-acting piston may additionally comprise the first and second pilot control valves 67a, 67b to control fluid communication between the first and second ends of a first cylinder 65a, 65b, a fluid direction control valve 71 and the first and second surplus fluid connection 13a, 13b which provides fluid communication from a pressure intensifying means to well bore 100. As is the case for a pressure intensification shown in figure 5, the flow of fluid to a first cylinder is controlled by a pilot control valve. Only when working with double-acting pistons can both sides of the piston be pressurized, so two pilot control valves may be required and in addition an additional fluid direction control valve determines whether the expansion fluid from the inlet 11 is directed towards the first or second pilot control valve 67a, 67b. The first pilot control valve 67a has two positions, the first position in which fluid communication is provided between a first end of a first cylinder 65a and the fluid direction control valve 71 for applying expansion fluid F1 in a first cylinder end 65a during pressurization of a second end of a second cylinder, and additionally has the second position in which fluid communication is provided between a first cylinder and the first excess fluid connection 13a and similarly, the second valve pilot control has two positions. Also, a pressure intensifying means comprising a double-acting piston may comprise the fluid direction control valve 71 which is then controlled by a first and second pilot 68a, 68b, a first pilot 68 determining when piston 60 reaches a stop position at a first end 65a of a first cylinder and a second pilot determining when piston 60 reaches a stop position at a second end 65b of the first cylinder, and in which the fluid direction is changed from a stop valve. pilot control to another via the fluid direction control valve 71 when the piston reaches a stop position, thereby engaging the first or second pilot 68a, 68b. Also, the first and second safety valves 63a, 63b, 69a, 69b are present in both circuits, which provides pressure on each side of the double-acting piston 60, with the same functionality as in a pressure intensification medium shown in figure 5.
    [00056] In some embodiments (not shown), a pressure intensifying means may comprise a pressurized gas that can be released within the annular barrier by releasing a gas control valve through the expansion fluid.
    [00057] Figure 7 shows the annular barrier comprising the first and second pressure intensifying means 10c, 10 arranged in series, a first pressure intensifying means 10c comprising a first inlet 11a and a first outlet 12c and a first inlet 11a in fluid communication with the expansion opening 9, and in which a second pressure intensifying means 10d comprises a second inlet 11d and a second outlet 12d and a second outlet 12d being in fluid communication with an annular barrier space 30. As can be seen, the annular barrier further comprises an intermediate pressure intensifying means 10f arranged in series, wherein the intermediate pressure intensifying means comprises an intermediate inlet 11f in fluid communication with a first outlet 12c and the intermediate outlet 12f being in fluid connection with second inlet 11d.
    [00058] By having the pressure intensification means in series, a higher pressure can be obtained in an intensified pressure fluid F2 used to expand the expandable sleeve 3.
    [00059] Figure 8 shows two annular barriers 1 sealing a flow inlet control section 600 in a downhole environment.
    [00060] An annular barrier system according to the present invention comprises a tubular well structure and at least one annular barrier arranged as part of the tubular structure. A plurality of annular barriers are assembled as part of the tubular structure of the well during the completion of the well, for example, to fix the tubular structure of the well in the well hole and to provide the isolation of the zone. Other annular barriers can be applied to seal specific volumes in the well bore, for example, a flow inlet control zone 600 like the one shown in figure 8.
    [00061] A method of arranging an annular barrier 1 in a ring comprises the steps of connecting the annular barrier with the tubular structure of the well 300 and then arranging the unexpanded annular barrier in a desired position at the bottom of the well. When the barrier is in position, an expansion fluid can be pressurized within the tubular part, thereby forcing the fluid to enter the expansion opening. When the expansion enters the expansion opening 9 and afterwards in a pressure intensifying means 10, the pressure in an annular barrier space 30 begins to intensify by means of a pressure intensifying means, thereby expanding the expandable sleeve.
    [00062] Additionally, a method of using annular barriers in a ring to seal a flow inlet control section comprises the steps of connecting two annular barriers with other parts of the tubular structure of the well and between them an inlet control section flow 600 and then arrange the two annular barriers and the flow inlet control section in a desired position at the bottom of the well. When the two barriers and the flow inlet control section are in place, the tubular part 2 is pressurized by the expansion fluid, and the annular barriers are expanded by an intensified pressure expansion fluid F2 from within the tubular part by means of a pressure intensifying means, thereby providing zone isolation between a first zone 102 and a second zone 103 of the well bore. The first zone now has a first fluid pressure and the second zone has a second fluid pressure and the pressure of the tubular part can be stopped and the flow inlet control section can be activated to start fluid production within the tubular structure of the well.
    [00063] The pressurized fluid used to expand the annular barrier can either be pressurized from the top of the well bore 100 and fed through the tubular structure of the well 300, or be pressurized in a locally sealed zone in the tubular structure of the well. The expansion fluid is applied until the expandable sleeve 3 contacts the inner wall 200 of the well hole, which is shown in figure 4. When the annular barrier 1 was expanded using a pressurized fluid and comes in contact with the side of within the wall of the well hole 200, the annular barrier provides a seal between a first zone 102 and a second zone 103 of the well hole. Thus, the first zone 102 is on one side of the annular barrier 1 and the second zone 103 is on the other side of the annular barrier 1.
    [00064] When the expandable sleeve 3 of the annular barrier 1 is expanded, the diameter of the sleeve is expanded from its initial unexpanded diameter to a larger diameter. The expandable sleeve 3 has an outer diameter D and is capable of expanding to a diameter of at least 10% larger, preferably a diameter of at least 15% larger, more preferably a diameter of at least 30% larger than that of an unexpanded sleeve.
    [00065] Additionally, the expandable sleeve 3 has a wall thickness t that is less than a length L of the expandable sleeve, the thickness preferably being less than 25% of the length, more preferably less than 15% of the length, and even more preferably less than 10% of the length.
    [00066] The expandable sleeve 3 of the annular barrier 1 can be produced from metal, polymers, an elastomeric material, silicone, or natural or synthetic rubber.
    [00067] In order to increase the thickness of glove 3, additional material can be applied (not shown) on the expandable glove, for example, when adding welded material on the outer face.
    [00068] In another embodiment, the thickness of the glove 3 is increased by attaching a ring-shaped part to the glove (not shown).
    [00069] In yet another embodiment, the increased thickness of glove 3 is facilitated using a variable glove thickness 3 (not shown). To obtain the variable thickness glove, techniques such as rolling, extruding or wedge cutting can be used.
    [00070] An expansion tool may be used to expand the annular barrier and may comprise an isolation device for isolating the first section outside the passage or valve between an external wall of the tool and the inner wall of the tubular structure of the well. Pressurized fluid is obtained by increasing the fluid pressure in the isolation device. When a section of the tubular structure of the well outside the passage of the tubular part is isolated, it is not necessary to pressurize the fluid throughout the tubular structure of the well, so that no additional plug is required as is the case in prior art solutions. When the fluid has been injected into an annular barrier space, the passage or valve is closed.
    [00071] The tool can also use a spiral tube to expand the expandable sleeve 3 of an annular barrier 1 or two annular barriers at the same time. A spiral tube tool can pressurize the fluid in the tubular structure of the well without having to isolate a section of the tubular structure of the well. However, the tool may need to plug the tubular structure of the well additionally below the well hole from the two annular barriers or barriers 1 to be operated. The annular barrier system of the present invention can also employ a drill pipe or thread tool to expand the glove.
    [00072] In one embodiment, the tool comprises a reservoir containing the pressurized fluid, for example, when the fluid used to expand the sleeve 3 is cement, gas or a two-component compound.
    [00073] The tubular structure of the well can be the production pipe or liner or a similar type of downhole tube in a well or a well hole. The annular barrier 1 can be used not only between the inner production tube and an outer tube in the well hole or between the tube and the inner wall of the well hole. A well can have several types of tubes, and the annular barrier 1 of the present invention can be mounted for use in all of them.
    [00074] The valve can be any type of valve capable of controlling the flow, such as a ball valve, butterfly valve, mixing valve, safety valve or non-return valve, diaphragm valve, expansion valve, valve gate valve, globe valve, knife valve, needle valve, piston valve, pinch valve or buffer valve.
    [00075] The expandable tubular metal sleeve 3 can be a cold drawn or heat drawn tubular structure. The glove can be seamless or welded.
    [00076] The expandable tubular metal sleeve 3 can be extruded, cast or rolled, for example, hot rolled, cold rolled, rolled-flexed etc., and subsequently welded.
    [00077] The fluid used to expand the expandable sleeve 3 can be any type of well fluid present in the well bore surrounding the tool and / or the tubular structure of the well. Also, the fluid can be cement, gas, water, polymers, or a two-component compound, such as powder or particles that mix or react with a binding or curing agent. Part of the fluid, such as the hardening agent, may be present in an annular barrier space before injecting a subsequent fluid into an annular barrier space.
    [00078] Although the present invention has been described above in connection with the preferred embodiments of the present invention, it will be apparent to those skilled in the art that various modifications are conceivable without departing from the present invention as defined by the following claims.
    权利要求:
    Claims (14)
    [0001]
    1. Annular barrier (1) to be expanded in a ring (101) between the tubular structure of the well (300) and an inner wall (4) of a well hole (100) to provide zone isolation between a first zone ( 102) and a second zone (103) of the well bore, comprising: - a tubular part (2) for mounting as part of the tubular structure of the well (300) and having an expansion opening (9), - an expandable sleeve ( 3) surrounding the tubular part, each end (31, 32) of the expandable sleeve being connected with the tubular part, and - an annular barrier space (30) between the tubular part (2) and the expandable sleeve (3), in that the annular barrier additionally comprises a pressure intensifying assembly (10) having an inlet (11) at a first end (10a) in fluid communication with the expansion opening (9) and having an outlet (12) in a second end (10b) in fluid communication with an annular barrier space, and in which a pressure intensifying assembly (10) comp a piston (60) has a first end (601) and a second end (602), the piston being slidably arranged within a piston housing (61), the piston housing comprising a first cylinder (65) having a first inner diameter which corresponds to an outer diameter of a first piston end and having a first end surface area (A1), and a second cylinder (66) having a second diameter which corresponds to an outer diameter of a second end of the piston and having a second end surface area (A2), a first end surface area (A1) being larger than a second end surface area (A2), characterized by the fact that an intensification set of The pressure (10) additionally comprises a supply fluid connection (75) configured to be in fluid communication with the inlet and the expansion opening to allow the fluid to enter the second cylinder lindro (66), and in which a pressure intensifying assembly additionally comprises a first one-way safety valve (69) arranged in the supply fluid connection (75) to prevent the fluid from leaving a second cylinder (66) during compression of the fluid by the piston (60) and to allow the fluid to enter the second cylinder (66) during decompression of the fluid by the piston (60), in which the pressure within the annular barrier space is increased by the pressure intensifying assembly to expand the expandable sleeve, where the pressure in the annular barrier space is greater than the pressure within the tubular part adjacent to the annular barrier; and in which each end of the expandable sleeve is connected to the tubular part by a respective connection means, and in which the pressure intensifying assembly is arranged at least partially within one of the respective connection means.
    [0002]
    2. Annular barrier (1) according to claim 1, characterized in that a pressure intensifying assembly (10) additionally comprises a second one-way safety valve (63) arranged between the supply fluid connection (75) and the outlet (12) of a pressure intensifying assembly (10) to prevent pressurized fluid from entering a second cylinder (66) during decompression of the fluid by the piston (60) and to allow pressurized fluid to escape from a pressure intensifying assembly (10) through the outlet (12) during compression of the fluid by the piston (60).
    [0003]
    Annular barrier (1) according to claim 1 or 2, characterized in that a pressure intensifying set (10) comprises a plurality of pressure intensifying sets (10c, 10d, 10e, 10f).
    [0004]
    4. Annular barrier (1), according to claim 3, characterized by the fact that the outlet (12) of a pressure intensification set (10) comprises a pressure collection chamber (72) in fluid communication with a plurality of second ends (601) of a plurality of pistons (60) and in fluid communication with an annular barrier space (30).
    [0005]
    5. Annular barrier (1), according to preceding claim 1, characterized by the fact that an excess fluid connection (13) between a pressure intensifying assembly and the well bore allows the fluid to flow from an assembly pressure intensification into the well bore.
    [0006]
    6. Annular barrier (1) according to the preceding claim 1, characterized by the fact that a pressure intensifying assembly comprises a space (62) within the piston housing between a first end and a second end of the piston.
    [0007]
    7. Annular barrier (1), according to claim 1, characterized by the fact that it additionally comprises a one-way valve (64) arranged in fluid communication with the well bore and an annular barrier space (30), allowing fluid to flow from the well bore into an annular barrier space (30).
    [0008]
    8. Annular barrier (1), according to preceding claim 1, characterized by the fact that the annular barrier comprises a first and a second set of pressure intensification (10c, 10d) arranged in series, a first set of pressure intensification (10c) comprising a first inlet (11a) and a first outlet (12c) and a first inlet (11a) being in fluid communication with the expansion opening (9), a second pressure intensifying set (10d) comprising a second inlet (11d) and second outlet (12d) and second outlet (12d) being in fluid communication with an annular barrier space (30).
    [0009]
    9. Annular barrier (1), according to preceding claim 1, characterized by the fact that the annular barrier (1) comprises a first and a second set of pressure intensification (10c, 10d) and at least one set of intensification of pressure intermediate pressure (10f) arranged in series, a first pressure intensifying means comprising a first inlet (11a) and a first outlet (12c) and a first inlet being in fluid communication with the expansion opening (9), a second pressure intensification means (10d) comprising a second inlet (11d) and a second outlet (12d) and a second outlet being in fluid communication with an annular barrier space (30), and in which the at least one set of intermediate pressure intensification (10f) comprises an intermediate inlet (11f) in fluid communication with a first outlet (12c) and an intermediate outlet (12f) being in fluid connection with second inlet (11d).
    [0010]
    An annular barrier (1) according to the preceding claim 1, wherein a pressure intensifying assembly comprises a hydraulic pressure intensifier, or a hydraulic pressure intensifier with a double-acting piston.
    [0011]
    11. Annular barrier (1), according to the preceding claim 1, characterized by the fact that a second set of pressure intensification (10e) is arranged at one end of the annular barrier opposite to a set of pressure intensification (10).
    [0012]
    12. Annular barrier system (500) characterized by the fact that it comprises: - a tubular structure of the well (300), and - at least an annular barrier (1), according to any one of claim 1 arranged as part of the tubular structure from the well.
    [0013]
    13. Method of arranging the annular barrier (1), according to claim 1, in a ring, characterized by the fact that it comprises the steps of: - connecting the annular barrier with the tubular structure of the well (300), - arranging the annular barrier not expanded in a desired position at the bottom of the well, - pressurize a fluid inside the tubular part, - intensify the pressure in an annular barrier space (30) by a pressure intensification set, and - expand the expandable sleeve .
    [0014]
    14. Method of using annular barriers, as defined in claim 1, in a ring to seal a flow inlet control section, characterized by the fact that it comprises the steps of: - connecting two annular barriers with the tubular structure of the well ( 300) and between them a flow inlet control section (600), - arrange the two annular barriers and the flow inlet control section in a desired position at the bottom of the shaft, - pressurize the tubular part (2) and expanding the annular barriers by intensifying pressure only at the annular barriers to provide isolation of the zone between a first zone (102) and a second zone (103) of the well bore, the first zone having a first fluid pressure and the second zone having a second fluid pressure, - stop the pressurization of the tubular part, and - activate the flow inlet control section to start the production of the fluid within the tubular structure of the well.
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    同族专利:
    公开号 | 公开日
    AU2012300924A1|2014-04-03|
    EP2751382A1|2014-07-09|
    RU2597418C2|2016-09-10|
    US20140216755A1|2014-08-07|
    CN103732850A|2014-04-16|
    MX348725B|2017-06-27|
    DK2751382T3|2017-10-30|
    CA2845490C|2019-07-02|
    MY181006A|2020-12-15|
    MX2014001743A|2014-03-31|
    CN103732850B|2016-08-17|
    BR112014002957A2|2017-03-01|
    WO2013030283A1|2013-03-07|
    AU2012300924B2|2015-09-17|
    CA2845490A1|2013-07-03|
    EP2565368A1|2013-03-06|
    RU2014109418A|2015-10-10|
    US9725980B2|2017-08-08|
    EP2751382B1|2017-07-26|
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    法律状态:
    2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-02-05| B25A| Requested transfer of rights approved|Owner name: WELLTEC OILFIELD SOLUTIONS AG (CH) |
    2019-05-14| B25G| Requested change of headquarter approved|Owner name: WELLTEC OILFIELD SOLUTIONS AG (CH) |
    2019-11-26| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-11-03| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2021-01-19| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-03-16| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 30/08/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP11179545A|EP2565368A1|2011-08-31|2011-08-31|Annular barrier with pressure amplification|
    EP11179545.6|2011-08-31|
    PCT/EP2012/066870|WO2013030283A1|2011-08-31|2012-08-30|Annular barrier with pressure amplification|
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