Rotary setting device for liner hangers, pipe string, and testing device

Abstract

The application provides a rotary setting device for a tailpipe hanger, which comprises a setting joint for connecting with a pulling pipe and a rotary setting mechanism, the rotary setting mechanism comprises a setting base sleeved outside the setting joint, a setting block embedded in a through slot of the setting base, a setting sleeve fixedly connected with the setting base, and a setting ring arranged between the setting joint and the setting sleeve, wherein a spring is arranged in the setting base, the setting block is configured to extend radially outward under the action of the spring, and the setting block is configured to transmit load and rotary torque to a back-joint cylinder of the tailpipe hanger under the driving action of the setting joint.

Description

Technical Field

[0001] This invention relates to the field of oil and gas well cementing, and more specifically to a rotary setting device, tubing string, and testing device for a tailpipe hanger. Background Technology

[0002] Currently, conventional packer-type tailpipe hangers generally include components such as the delivery tool, return sleeve, hanger unit, and packer unit rubber plug system. They typically employ mechanical setting, integrating the block-type setting unit onto the delivery tool. In horizontal or highly deviated wells, conventional mechanical blocks may not fully open, resulting in insufficient setting on the return sleeve and packer, thus affecting the setting effect.

[0003] CN101503952A discloses a setting mechanism for a packer-type tailpipe hanger. It includes an insertion tool, a sealing housing, a return tube, and a packer. The sealing housing has several through holes, each containing a safety stop. Correspondingly, a shallow annular groove is formed on the inner wall of the return tube at the same location. Therefore, when the undercut nut in the insertion tool is tightened with the sealing housing, one end of the safety stop is forced into the shallow annular groove, thus connecting the insertion tool, sealing housing, and return tube into a single unit via the safety stop. This device only has a protective hydraulic cylinder outside the setting stop to prevent premature setting of the hanger, but it lacks a rotational setting function and cannot guarantee a setting effect in horizontal or highly deviated wells.

[0004] Therefore, it is desirable in the art to provide a rotary setting device, string and testing device for a tailpipe hanger, which can solve the setting reliability problem of packers in horizontal wells or highly deviated wells and has good economic benefits. Summary of the Invention

[0005] The purpose of this invention is to provide a rotary setting device, a string of tubes, and a testing device for a tailpipe hanger. It can set the packer by rotating and pressing down, thereby solving the problem of packer setting reliability in horizontal wells or highly deviated wells, and has good economic benefits.

[0006] According to a first aspect of the invention, a rotary setting device for a tailpipe hanger is provided, comprising a setting joint for connection with a lifting tube, and A rotary setting mechanism, comprising a setting base sleeved around the setting joint, a setting stop embedded in a through groove of the setting base, a setting sleeve fixedly connected to the setting base, and a setting ring disposed between the setting joint and the setting sleeve. The setter base is provided with a spring, and the setter block is configured to extend radially outward under the action of the spring, and transmit load and rotational torque to the return cylinder of the tailpipe hanger under the driving action of the setter joint.

[0007] In one embodiment, the rotary setting device further includes a roller thrust bearing embedded between the setting joint and the setting sleeve, the roller thrust bearing abutting against the setting ring and the setting joint respectively.

[0008] In one embodiment, the rotary setting device further includes a set screw concentrically arranged within the spring, the set screw being fixed to the inner wall of the setting block, the setting block being retracted into the through groove under the action of the return sleeve (201).

[0009] In one embodiment, the setting sleeve coincides with the through groove portion, thereby restricting the movement path of the setting stop block.

[0010] In one embodiment, the rotary setting device further includes an adjusting ring fixedly connected to the setting sleeve, the adjusting ring being located below the setting base.

[0011] In one embodiment, the rotary sealing device further includes a retaining ring fixed below the adjusting ring and a pressure ring sleeved on the retaining ring.

[0012] According to a second aspect of the invention, a tube string is provided, including a tailpipe hanger and a sealing feed tool for use with said tailpipe hanger, said sealing feed tool including a lifting tube and a rotary setting device disposed below said lifting tube according to the above description.

[0013] According to a third aspect of the present invention, a testing apparatus utilizing a rotary setting device as described above is provided, comprising a test table, a first torque connector disposed at the upper end of the test table, a second torque connector for cooperating with the first torque connector, and a simulated base disposed on the test table. The second torque joint is fixedly connected to the setting joint in the rotary setting device, and the simulated base abuts against the setting block in the rotary setting device.

[0014] In one embodiment, the test bench includes a movable pressure plate and a base plate arranged at intervals, and at least two columns disposed between the movable pressure plate and the base plate.

[0015] In one embodiment, the lower end of the first torque connector is constructed as a prism structure, and a square groove structure for adapting to the first torque connector is provided in the second torque connector.

[0016] Compared with the prior art, the advantages of the present invention are as follows: The rotary setting device for liner hangers described in this application can achieve setting through rotational compression, thereby solving the problem of packer setting reliability in horizontal or highly deviated wells and offering significant economic benefits. Furthermore, this application can be used in conjunction with a testing device to simulate the entire rotary setting test process, thus achieving the technical objective of testing the setting effect. Simultaneously, the testing device can also perform torque testing on setting tools of different specifications by changing the setting base, demonstrating good versatility. Attached Figure Description

[0017] The present invention will now be described in detail with reference to the accompanying drawings.

[0018] Figure 1 The schematic diagram illustrates the structure of a rotary setting device for a tailpipe hanger according to the present invention.

[0019] Figure 2 The schematic diagram shows the specific structure of the tailpipe suspension.

[0020] Figure 3 The schematic diagram illustrates the specific structure of the isolation delivery tool.

[0021] Figure 4 The schematic diagram illustrates the structure of the test apparatus according to the present invention.

[0022] Figure 5 This is a perspective view of the simulated base according to the present invention.

[0023] Figure 6 This is a cross-sectional view of the simulated base according to the present invention.

[0024] Figure 7 The schematic diagram illustrates the connection relationship between the first torque connector and the second torque connector.

[0025] Figure 8 The diagram illustrates the connection between the rotary setting device for the tailpipe suspension and the test apparatus.

[0026] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0027] To make the technical solutions and advantages of the present invention clearer, exemplary embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not an exhaustive list of all embodiments. Furthermore, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0028] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0029] In this invention, unless otherwise explicitly specified and limited, the terms “installation,” “connection,” “linking,” “fixing,” etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components.

[0030] Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] Existing technologies typically employ mechanical setting, integrating a block-type setting unit onto the delivery tool. However, in horizontal or highly deviated wells, conventional mechanical blocks may not fully open, resulting in insufficient setting on the return sleeve and packer, thus affecting the setting effect. Therefore, this application proposes a rotary setting device for tailpipe hangers, which sets the packer by rotating and pressing down, thereby improving the setting reliability of the packer in horizontal or highly deviated wells.

[0032] The invention will now be further described with reference to the accompanying drawings.

[0033] like Figure 1 As shown, according to a first aspect of the present invention, a rotary setting device 100 for a tailpipe hanger is provided, mainly comprising a setting joint 11 for connection with a lifting tube 301, and a rotary setting mechanism for use in conjunction with the setting joint 11. The rotary setting mechanism includes a setting base 12 sleeved around the setting joint 11, a setting stop 13 embedded in a through groove 121 of the setting base 12, and a setting sleeve 14 fixedly connected to the setting base 12.

[0034] Preferably, the rotary setting mechanism further includes a setting ring 15 disposed between the setting joint 11 and the setting sleeve 14. The setting ring 15 is sleeved on the outer wall of the setting joint 11, and the setting sleeve 14 is sleeved on the outer wall of the setting ring 15. Therefore, during the rotary setting process, the setting joint 11 can drive the setting sleeve 14 to rotate, thereby achieving the technical effect that the setting joint 11 and the setting sleeve 14 rotate at different speeds.

[0035] In such Figure 1 In the embodiment shown, a spring 122 is provided in the setting base 12, so the setting block 13 in the initial state can retract into the through groove 121 under the action of the return sleeve 201. At this time, the spring 122 applies an outward preload force to the setting block 13. In this way, after the setting block 13 is pulled out from the return sleeve 201, the setting block 13 can extend radially outward under the action of the spring 122.

[0036] In this invention, the rotary setting device 100 for the tailpipe hanger further includes a set screw 101 concentrically arranged within the spring 122. Preferably, recesses for accommodating the spring 122 are formed on the setting base 12 and the setting joint 11, respectively, and the same recesses for accommodating the spring 122 are also formed on the setting stop 13. Therefore, the set screw 101 can fix the spring 122 in the recess of the setting stop 13, while also preventing the spring 122 from detaching from the setting stop 13. That is, the set screw 101 can effectively restrict the movement path of the spring 122, thereby ensuring that the setting stop 13 can open smoothly under predetermined conditions, which facilitates subsequent setting work.

[0037] In such Figure 1 In the illustrated embodiment, the rotary setting device 100 for the tailpipe hanger further includes a roller thrust bearing 19 embedded between the setting joint 11 and the setting sleeve 14. Specifically, the roller thrust bearing 19 is sleeved outside the setting joint 11, and the setting sleeve 14 is sleeved outside the roller thrust bearing 19. Preferably, the upper and lower ends of the roller thrust bearing 19 axially abut against the setting ring 15 and the setting joint 11, respectively. In this invention, the roller thrust bearing 19 can reduce friction during rotation between the setting joint 11 and the setting sleeve 14, thereby improving the setting effect and reliability of the packer in horizontal or highly deviated well conditions. Furthermore, the roller thrust bearing 19 can also transmit load and rotational torque.

[0038] The rotary setting device 100 for the tailpipe hanger of this application can be raised upwards after cementing is completed, until the setting block 13 is removed from the return connection 201. The setting block 13 can then extend radially outwards under the action of the spring 122. Simultaneously, the upper tool can apply load and rotational torque through the setting joint 11, and transmit them through the rotary setting mechanism. That is, the setting block 13 rotates and presses down under the driving action of the setting joint 11, so as to transmit the load and rotational torque through the setting block 13 to the return sleeve 201 of the tailpipe hanger (see...). Figure 1 ) and enclosure units (see Figure 1 This improves the setting reliability of packers in horizontal or highly deviated wells.

[0039] In such Figure 1 In the illustrated embodiment, the upper end of the setting block 13 is movably connected to the setting base 12. Therefore, when the setting block 13 is pulled out from the return sleeve 201, it can eject outward under the action of the spring 122, and transmit the load and rotational torque to the return sleeve 201 of the tailpipe hanger and the packer unit by rotating and pressing down, thereby completing the packer setting. In this invention, a channel is formed on the setting sleeve 14 to allow the setting block 13 to extend outward, and this channel partially overlaps with the through groove 121. In this way, the lower edge of the channel can restrict the movement path of the setting block 13, thereby ensuring the stability and firmness of the setting block 13 when rotating and pressing down.

[0040] In such Figure 1 In the illustrated embodiment, the rotary setting device 100 for the tailpipe hanger further includes an adjusting ring 16 disposed below and axially abutting against the setting base 12. The adjusting ring 16 is fixedly connected to the setting sleeve 14 (e.g., threaded connection), thus ensuring that the two can move synchronously. In this way, the adjusting ring 16 can cooperate with the setting sleeve 14 to effectively limit the setting stop 13.

[0041] In such Figure 1 In the illustrated embodiment, the rotary setting device 100 for the tailpipe hanger further includes a retaining ring 17 and a pressure ring 18 arranged sequentially from the inside to the outside. Both the retaining ring 17 and the pressure ring 18 are fixed to the lower end of the adjusting ring 16 by threads and set screws, thereby bearing the reaction force of the setting stop 13 on the setting base 12 and the adjusting ring 16 during the rotary pressing process, further extending the service life of the rotary setting device 100 for the tailpipe hanger downhole.

[0042] like Figures 2-3As shown, according to a second aspect of the present invention, a tube string is provided, including a tailpipe hanger 200 and a sealing feed tool 300 used in conjunction with the tailpipe hanger 200. The sealing feed tool 300 includes a lifting tube 301 and a rotary setting device 100 disposed below the lifting tube 301 as described above.

[0043] This application employs a ball-throwing and pressure-pressurizing method to achieve packer mounting, and uses forward rotation to mechanically release the packer delivery tool 300 from the tailpipe hanger 200. After cementing, the packer delivery tool 300 needs to be lifted first. After the setting stop 13 is lifted and reconnected to the return 201, it will be ejected by the spring 122. Then, the packer delivery tool 300 is rotated and pressed down through the setting joint 11 and the roller thrust bearing 19. In this way, the load and rotational torque are transmitted to the reconnection cylinder 201 and the packer unit through the setting stop 13, thereby achieving packer mounting. In this invention, the roller thrust bearing 19 can effectively reduce friction during rotation, thereby improving the mounting reliability of the packer in horizontal wells or highly deviated wells.

[0044] In such Figure 2 In the illustrated embodiment, the tailpipe hanger 200 includes a reconnection cylinder 201, a packer unit 202, and a hanger unit 203 arranged sequentially from top to bottom. The reconnection cylinder 201 is connected to the packer unit 202 by threads, and the packer unit 202 is connected to the hanger unit 203 by threads.

[0045] In such Figure 3 In the illustrated embodiment, the packer-type feed tool 300 includes, from top to bottom, a lifting tube 301, a rotary setting device 100 for the tailpipe hanger, a reverse nut 302, a sealing core 303, a central tube 304, a double-female coupling 305, etc. The reverse nut 302 is connected to the inside of the packer unit 202 via a reverse connection, and the setting joint 301 in the rotary setting device 100 for the tailpipe hanger is connected to the lifting tube 201 via a thread.

[0046] like Figure 4As shown, according to a third aspect of the present invention, a test apparatus utilizing a rotary setting device as described above is provided. The test apparatus includes a test bench 411, a first torque connector 401, a second torque connector 402, and a simulation base 410. The first torque connector 401 is disposed at the upper end of the test bench 411 for transmitting rotational torque; the lower end of the second torque connector 402 is fixedly connected to a rotary setting device 100 for a tailpipe hanger, and the upper end of the second torque connector 402 is engaged with the first torque connector 401, thereby transmitting rotational torque from the first torque connector 401 to the rotary setting device 100 for the tailpipe hanger; the simulation base 410 is fixedly mounted at the bottom end of the test bench 411 and is used to abut against a setting stop 13 to withstand the counter-torque during the rotary setting process.

[0047] During the test of the rotary setting torque, the first torque connector 401 needs to be inserted into the second torque connector 402, so that the first torque connector 401 and the second torque connector 402 sequentially provide the downward setting force (load) and rotational torque to the rotary setting device 100 for the tailpipe hanger, and further transmit it to the simulation base 410.

[0048] In such Figure 4 In the illustrated embodiment, the test bench 411 includes a movable pressure plate 412 and a bench base plate 413 arranged at intervals, and at least two columns 414 disposed between the movable pressure plate 412 and the bench base plate 413. The movable pressure plate 412 is capable of moving up and down along the columns 414 to provide a downward pressing and sealing force during the test; the first torque joint 401 is connected to an external motor and rotates to provide rotational torque during the test.

[0049] In such Figures 5-6 In the illustrated embodiment, the simulation base 410 includes a simulation return tube 403, an upper base 404, and a lower base 405. The simulation return tube 403 is disposed at the upper end of the upper base 404 and is fixedly connected by fixing bolts 406; the lower base 405 is disposed at the lower end of the upper base 404 and is fixedly connected by fixing bolts 406. Preferably, the simulation base 410 is mounted on the test bench base plate 413, and a stepped concave surface 415 is provided at the lower end of the lower base 405. A groove is formed on the test bench base plate 413, so the lower base 405 can be fixedly connected to the groove of the test bench base plate 413 through the stepped concave surface 415, thereby providing counter-torque during the pressing and rotation testing process. In such Figure 7In the illustrated embodiment, the lower end of the first torque connector 401 is constructed as a prism structure, which can be configured as a regular hexagonal male end, i.e., a hexagonal step on the upper connector; the second torque connector 402 is provided with a square groove structure for fitting the prism structure, and the inner wall of the square groove structure can be constructed as a regular hexagonal female end, i.e., a hexagonal step on the lower connector. Preferably, the square groove structure can be configured as an outer circle and an inner square.

[0050] In this invention, the lower end of the second torque connector 402 is provided with an external thread, thereby enabling it to be threadedly connected to the setting connector 11 of the rotary setting device 100 for the tailpipe hanger, thus improving the robustness, stability, and safety of both during testing. During assembly, the movable pressure plate 412 is lowered to allow the prismatic structure of the first torque connector 401 to enter the square groove structure of the second torque connector 402, allowing the rotational torque to be transmitted through the engagement of their hexagonal stepped surfaces. Simultaneously, because the second torque connector 402 is threadedly connected to the setting connector 11, the downward pressure load and rotational torque can be effectively increased.

[0051] Figure 8 The process of the rotary setting device 100 for the tailpipe hanger undergoing rotary setting in a test apparatus is shown. Before torque testing, the first torque connector 401, the second torque connector 402, the rotary setting device 100 for the tailpipe hanger, and the simulated base 410 need to be assembled. During torque testing, the setting block 13 pops outward under the action of the spring 122 and presses against the upper end of the simulated return cylinder 403. Then, the movable pressure plate 412 is adjusted so that the prism structure of the first torque connector 401 enters the square groove structure of the second torque connector 402, and the rotational torque is transmitted through the hexagonal stepped surfaces of the two. The load and rotational torque transmission path is generated by the first torque connector 401, and sequentially passes through the second torque connector 402 and the rotary setting device 100 for the tailpipe hanger, finally acting on the simulated return cylinder 403. This application also uses a torque instrument set on the test bench 411 to display the rotational torque throughout the test process, thereby judging the setting effect after data analysis.

[0052] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the scope of the present invention, and such changes or modifications should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A rotary setting device for a tailpipe hanger, comprising: The setting fitting (11) for connection with the lifting tube (301), and The rotary setting mechanism includes a setting base (12) sleeved outside the setting joint (11), a setting stop (13) embedded in a through groove (121) of the setting base (12), a setting sleeve (14) fixedly connected to the setting base (12), and a setting ring (15) disposed between the setting joint (11) and the setting sleeve (14). The seat base (12) is provided with a spring (122), and the seat block (13) is configured to extend radially outward under the action of the spring (122) and transmit load and rotational torque to the reconnection cylinder (201) of the tailpipe hanger under the driving action of the seat joint (11).

2. The rotary setting device for a tailpipe hanger according to claim 1, characterized in that, The rotary setting device also includes a roller thrust bearing (19) embedded between the setting joint (11) and the setting sleeve (14), the roller thrust bearing (19) abutting against the setting ring (15) and the setting joint (11) respectively.

3. The rotary setting device for a tailpipe hanger according to claim 2, characterized in that, The rotary setting device also includes a set screw (101) concentrically arranged in the spring (122), the set screw (101) being fixed on the inner wall of the setting block (13), the setting block (13) being retracted in the through groove (121) under the action of the return cylinder (201).

4. The rotary setting device for a tailpipe hanger according to claim 3, characterized in that, The setting sleeve (14) partially overlaps with the through groove (121), thereby restricting the movement path of the setting block (13).

5. The rotary setting device for a tailpipe hanger according to claim 4, characterized in that, The rotary setting device also includes an adjusting ring (16) fixedly connected to the setting sleeve (14), and the adjusting ring (16) is located below the setting base (12).

6. The rotary setting device for a tailpipe hanger according to claim 5, characterized in that, The rotary sealing device also includes a retaining ring (17) fixed below the adjusting ring (16) and a pressure ring (18) sleeved on the retaining ring (17).

7. A tube string comprising a tailpipe hanger (200) and a sealing feed tool (300) for use with said tailpipe hanger (200), said sealing feed tool (300) comprising a lifting tube (301) and a rotary setting device according to any one of claims 1 to 6 disposed below said lifting tube (301).

8. A test apparatus using the rotary setting device according to any one of claims 1 to 6, comprising a test table (411), a first torque connector (401) disposed at the upper end of the test table (411), a second torque connector (402) for use in conjunction with the first torque connector (401), and a simulated base (410) disposed on the test table (411). in, The second torque joint (402) is fixedly connected to the setting joint (11) in the rotary setting device, and the simulated base abuts against the setting stop (13) in the rotary setting device.

9. The testing apparatus according to claim 8, characterized in that, The test bench (411) includes a movable pressure plate (412) and a bench base plate (413) arranged at intervals, and at least two columns (414) disposed between the movable pressure plate (412) and the bench base plate (413).

10. The testing apparatus according to claim 9, characterized in that, The lower end of the first torque connector (401) is constructed as a prism structure, and a square groove structure for adapting to the first torque connector (401) is provided in the second torque connector (402).

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