Sleeve hanging and feeding tool

Abstract

A casing hanging and feeding tool comprises a lower body, a locking ring, a downward locking lining and an upper body which are sequentially nested on a mandrel from bottom to top, the end of the upper body is fixedly connected with a meniscus, and the meniscus is in limiting connection with the mandrel; a bearing step is arranged on the mandrel, a lower body is arranged on the bearing step, a plurality of fixing bolts are fixedly arranged on the lower body, the fixing bolts penetrate through the locking ring, the downward locking lining, the upper body and the half-moon plate to be connected with the lower body, the lower body and the half-moon plate are fixedly connected through the fixing bolts, and a first limiting groove is formed in the inner side wall of the lower body. A second limiting groove is formed in the mandrel, a plurality of limiting rings are arranged in the first limiting groove and the second limiting groove at the same time, and limiting ring pressing bolts are arranged on the limiting rings. The service tool has the advantages that during rotation of the mandrel of the service tool, the mandrel has no displacement relative to the lower body and the upper body in the vertical direction, torque build-up caused by vertical movement of the mandrel during rotation is avoided, and the probability of complex conditions is reduced.

Description

Technical Field

[0001] This invention relates to the field of oil and gas drilling and production equipment technology, and more specifically to a casing hook delivery tool. Background Technology

[0002] The casing hanger is a major component of the subsea wellhead. It is connected to the top of the casing and is used to suspend the casing string inside the high-pressure wellhead.

[0003] A casing hanger is a subsea wellhead service tool used to install casing hangers and casing strings into high-pressure wellheads and assist in cementing. Based on its structure, it is divided into threaded and locking ring types. The threaded casing hanger insertion tool connects to the casing hanger via threads, while the locking ring type uses a rotating spindle to drive a locking ring, locking and unlocking it with the casing hanger.

[0004] Among them, threaded tools, which use rigid connection structures, often suffer from torque buildup due to the up-and-down movement of the spindle, thus increasing the probability of complex situations occurring during construction. Summary of the Invention

[0005] This invention overcomes the shortcomings of the prior art and provides a sleeve insertion tool.

[0006] A casing inserter includes: The spindle is nested from bottom to top with a lower body, a locking ring, a downward locking bushing, and an upper body. The end of the upper body is fixedly connected to the meniscus, and the meniscus is limited to the spindle. The spindle is provided with a bearing step, and a lower body is provided on the bearing step. Multiple fixing bolts are fixed on the lower body. The fixing bolts pass through the locking ring, the downward locking bushing, the upper body and the half-menstrument and are connected to the lower body. A first limiting groove is provided on the inner side wall of the lower body, and a second limiting groove is provided on the spindle. Multiple limiting rings are provided in the first limiting groove and the second limiting groove at the same time. Limiting ring clamping bolts are provided on the limiting rings to control the degree of contraction of the limiting rings. The locking rings are nested on the outside of the circular array formed by the fixing bolts; The spindle is connected to the downward locking bushing via a threaded structure. The upper body is fitted onto the upper part of the downward locking bushing. Multiple anti-rotation keys are provided on the four side walls of the upper body. The anti-rotation keys are connected to the upper body via anti-rotation key fixing bolts. An anti-rotation cylindrical pin is provided between the upper body and the downward locking bushing. A cylindrical pin limit bolt is installed above the anti-rotation cylindrical pin to prevent the anti-rotation cylindrical pin from coming out of the downward locking bushing.

[0007] A gasket is provided between the supporting step and the lower body.

[0008] The outer surface of the mandrel is provided with a top thread structure, a half-moon plate limiting groove, a low torque thread surface, a second limiting groove, a mandrel sealing surface, and a bearing step from top to bottom; The top thread structure is used for connection with the drill pipe; The low-torque threaded surface is matched with the threaded structure of the downward locking bushing; The mandrel sealing surface forms a seal with the sealing ring provided on the lower body.

[0009] The top surface of the lower body is provided with multiple fixing bolt mounting holes, and fixing bolts are correspondingly installed in the fixing bolt mounting holes; The lower body has two outer sealing ring grooves on its outer sidewall, and a sealing ring is installed in the outer sealing ring groove. The lower body sidewall between the two outer sealing ring grooves has multiple clamping bolt mounting holes, which are connected to the first limiting groove. A limiting ring clamping bolt is installed in the clamping bolt mounting hole.

[0010] An inner sealing ring groove is provided on the inner side wall of the lower body located at the lower part of the first limiting groove, and a sealing ring is provided in the inner sealing ring groove.

[0011] The downward locking bushing is provided with a first fixing bolt hole, and a fixing bolt is inserted through the first fixing bolt hole. The side wall of the downward locking bushing is provided with multiple anti-rotation cylindrical pin holes, and each anti-rotation cylindrical pin hole is provided with an anti-rotation cylindrical pin. A limit bolt hole is provided through the anti-rotation cylindrical pin hole, and a cylindrical pin limit bolt is provided in the limit bolt hole.

[0012] The bottom surface of the downward locking bushing is provided with a locking ring pressing surface, which matches the structure of the upper part of the locking ring.

[0013] The top surface of the upper body is provided with multiple meniscus connection threaded holes and second fixing bolt holes. Meniscus connection bolts are installed in the meniscus connection threaded holes and are fixedly connected to the meniscus. Fixing bolts are installed through the second fixing bolt holes. The upper body has multiple keyways on its side wall, and anti-rotation keys are installed in the keyways. The outer side of the upper body is provided with an upper body sealing groove, and a sealing ring is provided inside the upper body sealing groove.

[0014] The anti-rotation key is equipped with a disassembly screw, which is matched with the anti-rotation key fixing bolt.

[0015] The meniscus has multiple threaded holes for connection, and corresponding fixing bolts or meniscus connecting bolts are installed in the threaded holes.

[0016] The beneficial effects of this invention are as follows: 1. During rotation, the spindle of the service tool does not move vertically relative to the lower or upper body. During rotation, the spindle will not cause torque buildup due to up-and-down movement, reducing the probability of complex situations.

[0017] 2. There is no rigid structural connection between the lower and upper bodies of the service tool, resulting in weak overall rigidity of the service tool. This reduces the requirements for wellhead tilt angle and platform positioning accuracy, thus lowering the difficulty of operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the mandrel structure; Figure 3 This is a schematic diagram of the structure of the lower body; Figure 4 This is a schematic diagram of the downward locking bushing structure; Figure 5 This is a schematic diagram of the structure of the upper body; Figure 6 This is a schematic diagram of the meniscus.

[0019] In the picture: 1. Mandrel; 101. Top surface thread structure; 102. Meniscus limiting groove; 103. Low torque thread surface; 104. Second limiting groove; 105. Mandrel sealing surface; 106. Bearing step; 2. Washer ring; 3. Lower body; 301. Fixing bolt mounting hole; 302. Outer sealing ring groove; 303. Tightening bolt mounting hole; 304. Locking ring clamping surface; 305. First limiting groove; 306. Inner sealing ring groove; 4. Limiting ring; 5. Limiting ring clamping bolt; 6. Locking ring; 7. Downward locking bushing; 7 01. First fixing bolt hole; 702. Locking ring clamping surface; 703. Limit bolt hole; 704. Anti-rotation cylindrical pin hole; 8. Upper body; 801. Second fixing bolt hole; 802. Meniscus connecting threaded hole; 803. Keyway; 804. Upper body sealing groove; 9. Meniscus; 10. Fixing bolt; 11. Anti-rotation key fixing bolt; 12. Anti-rotation key; 13. Removal screw; 14. Cylindrical pin limit bolt; 15. Anti-rotation cylindrical pin; 16. Meniscus connecting bolt; 17. Connecting threaded hole. Detailed Implementation

[0020] Example A casing inserter includes: The spindle 1 is nested from bottom to top with a lower body 3, a locking ring 6, a downward locking bushing 7 and an upper body 8. The end of the upper body 8 is fixedly connected to the meniscus 9, and the meniscus 9 is limitedly connected to the spindle 1. The spindle 1 is provided with a bearing step 106, and a lower body 3 is provided on the bearing step 106. Multiple fixing bolts 10 are fixed on the lower body 3. The fixing bolts 10 pass through the locking ring 6, the downward locking bushing 7, the upper body 8 and the meniscus 9 and are connected to the lower body 3. A first limiting groove 305 is provided on the inner side wall of the lower body 3, and a second limiting groove 104 is provided on the spindle 1. Multiple limiting rings 4 are provided in both the first limiting groove 305 and the second limiting groove 104. A limiting ring clamping bolt 5 is provided on the limiting ring 4 to control the degree of contraction of the limiting ring 4. The locking ring 6 is nested on the outside of the circular array formed by each fixing bolt 10; The spindle 1 is connected to the downward locking bushing 7 via a threaded structure. The upper body 8 is fitted onto the upper part of the downward locking bushing 7. Multiple anti-rotation keys 12 are provided on the four sides of the upper body 8 for connecting with the sleeve hanger. The anti-rotation keys 12 are connected to the upper body 8 via anti-rotation key fixing bolts 11. An anti-rotation cylindrical pin 15 is provided between the upper body 8 and the downward locking bushing 7. A cylindrical pin limiting bolt 14 is installed above the anti-rotation cylindrical pin 15 to prevent the anti-rotation cylindrical pin 15 from coming out of the downward locking bushing 7.

[0021] A gasket 2 is provided between the supporting step 106 and the lower body 3.

[0022] The outer surface of the mandrel 1 is provided with a top thread structure 101, a semi-circular limiting groove 102, a low torque thread surface 103, a second limiting groove 104, a mandrel sealing surface 105, and a bearing step 106 from top to bottom. The top thread structure 101 is used for connection with the drill pipe; The low-torque threaded surface 103 is matched with the threaded structure of the downward locking bushing 7; The mandrel sealing surface 105 forms a seal with the sealing ring provided on the lower body 3.

[0023] The top surface of the lower body 3 is provided with multiple fixing bolt mounting holes 301, and fixing bolts 10 are provided in the fixing bolt mounting holes 301 respectively; The lower body 3 has two outer sealing ring grooves 302 on its outer sidewall. A sealing ring is provided in the outer sealing ring groove 302. Multiple clamping bolt mounting holes 303 are provided on the sidewall of the lower body 3 between the two outer sealing ring grooves 302. The clamping bolt mounting holes 303 are connected to the first limiting groove 305. A limiting ring clamping bolt 5 is provided in the clamping bolt mounting holes 303.

[0024] An inner sealing ring groove 306 is provided on the inner side wall of the lower body 3 located at the lower part of the first limiting groove 305, and a sealing ring is provided in the inner sealing ring groove 306.

[0025] The downward locking bushing 7 is provided with a first fixing bolt setting hole 701, and a fixing bolt 10 is provided through the first fixing bolt setting hole 701. The side wall of the downward locking bushing 7 is provided with a plurality of anti-rotation cylindrical pin holes 704, and an anti-rotation cylindrical pin 15 is provided in each anti-rotation cylindrical pin hole 704. A limit bolt hole 703 is provided through the anti-rotation cylindrical pin hole 704, and a cylindrical pin limit bolt 14 is provided in the limit bolt hole 703.

[0026] The bottom surface of the downward locking bushing 7 is provided with a locking ring pressing surface 702, which matches the structure of the upper part of the locking ring 6.

[0027] The top surface of the upper body 8 is provided with multiple meniscus connection threaded holes 802 and second fixing bolt mounting holes 801. Meniscus connection bolts 16 are installed in the meniscus connection threaded holes 802, and the meniscus connection bolts 16 are fixedly connected to the meniscus 9. Fixing bolts 10 are inserted through the second fixing bolt mounting holes 801. The upper body 8 has multiple keyways 803 on its side wall, and anti-rotation keys 12 are installed in the keyways 803. The outer side of the upper body 8 is provided with an upper body sealing groove 804, and a sealing ring is provided inside the upper body sealing groove 804.

[0028] The anti-rotation key 12 is provided with a disassembly screw 13, which is matched with the anti-rotation key fixing bolt 11.

[0029] The meniscus 9 is provided with multiple threaded holes 17, and a fixing bolt 10 or a meniscus connecting bolt 16 is provided in the threaded holes 17.

[0030] The working principle of this solution is as follows.

[0031] like Figure 1 As shown, the downward locking bushing 7 moves axially along the spindle 1 via its rotation. When the downward locking bushing 7 approaches the lower body 3, it opens the locking ring 6, securing the entire device inside the pipe. When the downward locking bushing 7 moves towards the upper body 8, it releases the device for retraction.

[0032] Furthermore, the locking ring 6 is limited by the ring-shaped fixing bolt 10 to prevent the locking ring 6 from shrinking too little or becoming eccentric after shrinking. The anti-rotation key 12 achieves the anti-rotation effect by establishing a connection with the sleeve hanger. At the same time, the disassembly screw 13 provided on the anti-rotation key 12 is used to cooperate with the anti-rotation key fixing bolt 11 to disassemble the anti-rotation key fixing bolt 11.

[0033] like Figure 2 As shown, the top of the mandrel 1 is provided with a top surface thread structure 101 for connection with the drill rod.

[0034] like Figure 3As shown, the lower body 3 is fixedly mounted with fixing bolts 10 through fixing bolt mounting holes 301 for limiting support. The clamping bolt mounting hole 303 communicates with the first limiting groove 305 to allow the limiting ring clamping bolt 5 and the limiting ring 4 to align. The limiting ring 4 is simultaneously positioned within the first limiting groove 305 and the second limiting groove 104, achieving locking and keeping the lower body 3 and the spindle 1 relatively stationary.

[0035] like Figure 4 As shown, the downward locking bushing 7 is provided with a first fixing bolt hole 701 for the fixing bolt 10 to pass through the downward locking bushing 7. The anti-rotation cylindrical pin hole 704 is provided with an anti-rotation cylindrical pin 15 to prevent the downward locking bushing 7 from rotating relative to the upper body 8. The limiting bolt 14 limits the anti-rotation cylindrical pin 15 to prevent it from coming out during movement.

[0036] like Figure 5 and Figure 6 As shown, the meniscus connecting threaded hole 802 and the second fixing bolt mounting hole 801 on the upper body 8 are used to mount the fixing bolt 10 and the meniscus connecting bolt 16, respectively. The keyway 803 is used to mount the anti-rotation key 12. The upper body sealing groove 804 achieves a sealing function by setting a sealing ring. The meniscus 9 achieves a limiting function by cooperating with the meniscus limiting groove 102, providing support for the lower body 3 and the upper body 8.

[0037] The specific usage instructions for this solution include: Connect the device to the lower casing string, suspend it on the turntable using casing slips, connect the casing hanger to the casing string, and suspend it on the turntable using casing slips.

[0038] The cementing string is inserted into the casing hanger and suspended on the C-shaped plate by drill pipe slips.

[0039] The casing hanger insertion tool is moved to the drilling platform and connected to the drill pipe via the top threaded structure 101. The casing hanger insertion tool is then connected to the cementing inner tubing string.

[0040] Insert the casing hook into the casing hook using the insertion tool, and rotate the spindle 1 to open the locking ring 6 and lock it into the casing hook.

[0041] Hang the drill pipe casing above the low-pressure wellhead, slowly lower it to align the casing hanger with the low-pressure wellhead, and then lift the casing hanger to a certain weight to confirm that the casing hanger is correctly connected to the low-pressure wellhead.

[0042] Cementing operations were carried out in accordance with the work instructions.

[0043] Reverse spindle 1 to restore the locking ring 6 to its free state, unlock it from the sleeve hook, lift the sleeve hook feeding tool, and remove the sleeve hook feeding tool from the sleeve hook.

[0044] The embodiments of the present invention have been described in detail above, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A sleeve-feeding tool, characterized in that, include: The spindle (1) is nested from bottom to top with a lower body (3), a locking ring (6), a downward locking bushing (7) and an upper body (8). The end of the upper body (8) is fixedly connected to the meniscus (9), and the meniscus (9) is limitedly connected to the spindle (1). The spindle (1) is provided with a bearing step (106), and a lower body (3) is provided on the bearing step (106). Multiple fixing bolts (10) are fixed on the lower body (3). The fixing bolts (10) pass through the locking ring (6), the downward locking bushing (7), the upper body (8) and the meniscus (9) and are connected to the lower body (3). A first limiting groove (305) is provided on the inner side wall of the lower body (3), and a second limiting groove (104) is provided on the spindle (1). Multiple limiting rings (4) are provided in the first limiting groove (305) and the second limiting groove (104). A limiting ring clamping bolt (5) is provided on the limiting ring (4) to control the degree of contraction of the limiting ring (4). The locking ring (6) is nested on the outside of the circular array formed by each fixing bolt (10); The spindle (1) is connected to the downward locking bushing (7) via a threaded structure. The upper body (8) is fitted onto the upper part of the downward locking bushing (7). Multiple anti-rotation keys (12) are provided on the four sides of the upper body (8). The anti-rotation keys (12) are connected to the upper body (8) via anti-rotation key fixing bolts (11). An anti-rotation cylindrical pin (15) is provided between the upper body (8) and the downward locking bushing (7). A cylindrical pin limiting bolt (14) is installed above the anti-rotation cylindrical pin (15) to prevent the anti-rotation cylindrical pin (15) from coming out of the downward locking bushing (7).

2. The sleeve insertion tool according to claim 1, characterized in that: A gasket (2) is provided between the supporting step (106) and the lower body (3).

3. The sleeve insertion tool according to claim 1, characterized in that: The outer surface of the mandrel (1) is provided with a top thread structure (101), a meniscus limiting groove (102), a low torque thread surface (103), a second limiting groove (104), a mandrel sealing surface (105), and a bearing step (106) from top to bottom. The top thread structure (101) is used for connection with the drill pipe; The low-torque threaded surface (103) matches the threaded structure of the connecting downward locking bushing (7). The mandrel sealing surface (105) forms a seal with the sealing ring provided on the lower body (3).

4. The sleeve insertion tool according to claim 3, characterized in that: The top surface of the lower body (3) is provided with multiple fixing bolt mounting holes (301), and fixing bolts (10) are provided in the fixing bolt mounting holes (301). The lower body (3) has two outer sealing ring grooves (302) on its outer sidewall. A sealing ring is provided in the outer sealing ring groove (302). Multiple clamping bolt mounting holes (303) are provided on the sidewall of the lower body (3) between the two outer sealing ring grooves (302). The clamping bolt mounting holes (303) are connected to the first limiting groove (305). A limiting ring clamping bolt (5) is provided in the clamping bolt mounting holes (303).

5. A sleeve insertion tool according to claim 4, characterized in that: An inner sealing ring groove (306) is provided on the inner side wall of the lower body (3) located at the lower part of the first limiting groove (305), and a sealing ring is provided in the inner sealing ring groove (306).

6. A sleeve insertion tool according to claim 4, characterized in that: The downward locking bushing (7) is provided with a first fixing bolt setting hole (701), and a fixing bolt (10) is provided through the first fixing bolt setting hole (701). Multiple anti-rotation cylindrical pin holes (704) are provided on the side wall of the downward locking bushing (7). An anti-rotation cylindrical pin (15) is provided in each anti-rotation cylindrical pin hole (704). A limit bolt hole (703) is provided through the anti-rotation cylindrical pin hole (704), and a cylindrical pin limit bolt (14) is provided in the limit bolt hole (703).

7. A sleeve insertion tool according to claim 6, characterized in that: The bottom surface of the downward locking bushing (7) is provided with a locking ring pressing surface (702), which matches the structure of the upper part of the locking ring (6).

8. A sleeve insertion tool according to claim 6, characterized in that: The top surface of the upper body (8) is provided with multiple meniscus connection threaded holes (802) and a second fixing bolt setting hole (801). The meniscus connection threaded holes (802) are provided with meniscus connection bolts (16), which are fixedly connected to the meniscus (9). The second fixing bolt setting hole (801) is provided with a fixing bolt (10). Multiple keyways (803) are provided on the side wall of the upper body (8), and anti-rotation key (12) is provided in the keyway (803). The outer side of the upper body (8) is provided with an upper body sealing groove (804), and a sealing ring is provided inside the upper body sealing groove (804).

9. A sleeve insertion tool according to claim 8, characterized in that: The anti-rotation key (12) is provided with a disassembly screw (13), which is matched with the anti-rotation key fixing bolt (11).

10. A sleeve insertion tool according to claim 8, characterized in that: The meniscus (9) is provided with multiple threaded holes (17), and a fixing bolt (10) or a meniscus connecting bolt (16) is provided in the threaded holes (17).

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