Taking-out tool for metal sealing element of tubing hanger

Abstract

The utility model relates to the field of working tools, in particular to a tool for taking out a metal sealing piece of an oil pipe hanger, which comprises a guide rod, a bearing piece, a clamping block and a driving sleeve, and can enter the metal sealing piece and a port of the oil pipe hanger through a first inner hole of the metal sealing piece. When the driving sleeve on the guide rod moves close to the clamping block, the driving sleeve can be matched with the bearing piece to extrude the clamping block to expand to the outer side; the bearing part of the clamping block is embedded into a concave part formed in the inner wall of the first inner hole of the metal sealing piece or embedded into a gap between the metal sealing piece and the end face of the oil pipe hanger in the axial direction, then the guide rod is lifted, and the bearing part of the clamping block can abut against the corresponding position of the metal sealing piece. The metal sealing piece is subjected to force far away from the oil pipe hanger in the axial direction, so that the metal sealing piece is taken down, the installation and use process of the taking-out tool is simple and easy to operate, and the stability is higher.

Description

Technical Field

[0001] This utility model relates to the field of work tools and fixtures, specifically to a tool for removing metal seals from an oil pipe hanger. Background Technology

[0002] The metal seal at the end of the tubing hanger is usually embedded in the tubing hanger by an interference fit. Currently, when removing the metal seal from the tubing hanger, the method of knocking or prying is often used, which often causes damage to the tubing hanger or the metal seal, and is time-consuming and laborious.

[0003] Therefore, there is a need to propose a tool for removing the metal seal of the tubing hanger, which can stably and conveniently remove the metal seal. Utility Model Content

[0004] To achieve the above-mentioned technical effects, this utility model provides a tool for removing a metal seal of a tubing hanger, used to assist in removing a metal seal that is interference-fitted and installed on the port of a tubing hanger. The metal seal has a first inner hole, and the tool includes:

[0005] Guide rod;

[0006] The support member is connected to the guide rod, and the support member can pass through the first inner hole and abut against the support port of the oil pipe hanger;

[0007] A locking block is disposed on the upper surface of the support member, and a plurality of locking blocks are disposed thereon, the plurality of locking blocks being distributed circumferentially around the guide rod. The locking block is also provided with a bearing portion, the bearing portion extending from the side of the locking block away from the guide rod toward the side closer to the metal seal. The side of the metal seal close to the locking block is provided with a mating portion that can be embedded and engaged with the bearing portion.

[0008] A guide structure is provided on the support member, and the guide structure extends radially along the first inner hole, and the clamping block is slidably engaged with the guide structure;

[0009] A drive sleeve is axially movably disposed on the guide rod, and the drive sleeve is located at the end of the clamping block away from the support member; at least one of the drive sleeve and the clamping block is provided with a drive surface, and the other is provided with a drive mating surface that mates with the drive surface, and the distance between the plane containing the drive surface and the axis of the guide rod gradually decreases from the direction of the drive sleeve toward the support member.

[0010] Preferably, the guide rod is provided with an external thread, and the drive sleeve is threadedly engaged with the guide rod. When the drive sleeve is rotated relative to the guide rod, the drive sleeve moves along the axial direction of the guide rod.

[0011] Preferably, the extraction tool further includes:

[0012] A support plate having a second inner hole for inserting the guide rod, and the support plate being connected to the oil pipe hanger via a support part;

[0013] A threaded sleeve is threadedly engaged with the guide rod, and the end face of the threaded sleeve abuts against the end face of the second inner hole on the side away from the support member.

[0014] Preferably, it further includes a guide sleeve, which is fixedly installed in the second inner hole. The guide sleeve has a third inner hole, and the end of the drive sleeve away from the support member is located in the third inner hole. The outer wall surface of the part of the drive sleeve located in the third inner hole matches the inner wall surface of the third inner hole.

[0015] Preferably, the support plate has a plurality of mounting holes, and the support part includes a threaded support rod passing through the mounting holes, and mounting nuts installed on the threaded support rod on both sides of the mounting holes, wherein the mounting nuts abut against the end face of the mounting holes.

[0016] Preferably, a level is provided on the support plate.

[0017] Preferably, the end face of the bearing portion that contacts the metal seal is perpendicular to the axial direction of the first inner hole.

[0018] Preferably, the clamping block also has a limiting surface, which is formed by extending from one end of the bearing portion near the guide rod away from the support member. When the clamping block moves away from the guide rod, the limiting surface can fit against the wall of the first inner hole to limit the range of motion of the clamping block.

[0019] Preferably, the outer contour dimension of the limiting surface gradually increases along the axial direction of the first inner hole, and the inner wall of the first inner hole is provided with a mating surface with the same shape as the limiting surface. When the clamping block moves toward the metal seal, the limiting surface can fit with the mating surface.

[0020] Preferably, the guide structure includes:

[0021] The slider and the slide groove are respectively provided on the clamping block and the support member. The slide groove extends radially along the guide rod, and the slider can slide back and forth in the slide groove.

[0022] By applying the technical solution provided by this utility model, the guide rod, support member, and clamping block of the extraction tool can enter the port of the metal seal and the tubing hanger through the first inner hole of the metal seal. The support member can abut against the support port of the tubing hanger. When the drive sleeve on the guide rod moves towards the clamping block, it can cooperate with the support member to squeeze the clamping block outward, thereby embedding the bearing part of the clamping block into the recessed part opened on the inner wall of the first inner hole of the metal seal or into the axial gap between the metal seal and the end face of the tubing hanger. At this time, when the guide rod is pulled up, the bearing part of the clamping block can abut against the corresponding part of the metal seal and transmit the external force received by the guide rod to the clamping block, so that the metal seal is subjected to a force along the axial direction away from the tubing hanger, thereby removing the metal seal. The installation and use of the extraction tool is simple and easy to operate, and the force between the clamping block and the metal seal is a stable contact force, so it is not easy to damage the metal seal or the tubing hanger. Attached Figure Description

[0023] Figure 1a and Figure 1b This is a schematic diagram of the tool for removing the metal seal of the tubing hanger provided in this embodiment of the invention in two states;

[0024] Figure 2 This is a schematic diagram of the structure of the tool for removing the metal seal of the tubing hanger provided in this embodiment of the utility model;

[0025] Figure 3a and Figure 3b This is a schematic diagram showing the positional changes of the clamping block of the tool for removing the metal seal of the tubing hanger provided in this embodiment of the utility model under two states;

[0026] Among them, 1. Oil pipe hanger; 11. Support port; 12. Support platform; 2. Metal seal; 21. First inner hole; 22. Mating surface; 3. Removal tool; 31. Guide rod; 32. Support component; 321. Slide groove; 33. Clamping block; 331. Bearing part; 332. Limiting surface; 333. Slider; 334. Mounting hole; 34. Drive sleeve; 35. Support plate; 351. Second inner hole; 36. Threaded sleeve; 37. Guide sleeve; 371. Third inner hole; 38. Threaded support rod. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] Figure 1a and Figure 1b This is a schematic diagram of the tool for removing the metal seal of the tubing hanger provided in this embodiment of the invention in two states.

[0029] like Figure 1a and Figure 1b As shown, this utility model embodiment provides a tool for removing the metal seal of an oil pipe hanger, which is used to assist in removing the metal seal 2 that is interference-fitted on the port of the oil pipe hanger 1. The metal seal 2 is an annular structure with a first inner hole 21 in the middle.

[0030] The extraction tool 3 includes a guide rod 31, a support member 32, a clamping block 33, and a drive sleeve 34. The support member 32 is fixedly connected to the guide rod 31. The outer contour dimension of the support member 32 in the radial direction is smaller than the inner contour dimension of the first inner hole 21. Several clamping blocks 33 are provided on the support member 32, and the several clamping blocks 33 are distributed circumferentially around the guide rod 31. A guide structure is provided between the support member 32 and the clamping blocks 33 to limit the clamping blocks 33 to move only in the radial direction of the guide rod 31.

[0031] The drive sleeve 34 is axially movably mounted on the guide rod 31 and located on the side of the clamping block 33 away from the support member 32. The end of the drive sleeve 34 near the clamping block 33 and / or the end of the clamping block 33 near the drive sleeve 34 have an inner wall profile that gradually tapers along a first direction, which is the direction along the axial direction of the guide rod 31 from the clamping block 33 to the support member 32. Figure 1a In the embodiment shown, the first direction is the vertically downward direction;

[0032] When using the extraction tool 3, it is inserted into the tubing hanger 1 through the first inner hole 21, so that the support member 32 abuts against the support port 11 of the tubing hanger 1, and the clamping block 33 abuts against the support member 32. When the drive sleeve 34 moves in the first direction, the drive sleeve 34 and the support member 32 squeeze the clamping block 33, driving the clamping block 33 to move towards the first inner hole 21 and making the bearing part 331 cooperate with the mating part. At this time, the metal seal can be removed by pulling up the guide rod.

[0033] Furthermore, the movement range of the clamping block 33 can be limited by the guide structure, allowing the clamping block 33 to move between a first position close to the guide rod 31 and a second position away from the guide rod 31. When the clamping block 33 is in the first position, it is located on the radial inner side of the first inner hole, allowing the clamping block 33 to pass smoothly through the first inner hole 21 with the support member 32. When the clamping block 33 is in the second position, the bearing part 331 of the clamping block 33 can be embedded into the mating part on the metal seal member 2.

[0034] Furthermore, the distance between the outer edge of the bearing portion 331 of the clamping block 33 and the inner edge of the tubing hanger 1 can be limited by a guide structure when in the second position, such as... Figure 1a and Figure 1b As shown, when the clamping block 33 is in the second position, the bearing part 331 is precisely embedded in the gap between the metal seal 2 and the tubing hanger 1, and will not come into contact with the inner wall of the tubing hanger 1 to generate friction.

[0035] like Figure 1a As shown, when all the clamping blocks 33 are in the first position, they are all located on the radially inner side of the first inner hole 21, allowing the extraction tool 3 to pass through the first inner hole 21 axially. Figure 1b As shown, when the clamping block 33 is in the second position, the bearing part 331 of the clamping block 33 is located on the radially outer side of the first inner hole 21, that is, it is already embedded in the mating part of the metal seal 2. At this time, the guide rod 31 is pulled in the opposite direction to the first direction. Through the transfer action between the support member 32 and the clamping block 33, this pulling force is applied to the metal seal 2 by the bearing part 331. This force is a stable static contact force. When this force is greater than the static friction force between the metal seal 2 and the tubing hanger 1, the metal seal 2 is removed. The removal tool 3 has a simple structure and is convenient and quick to install on the tubing hanger 1, making it easy to use.

[0036] It should be noted that, in Figure 1a and Figure 1b In the illustrated embodiment, the ends of the drive sleeve 34 and the clamping block 33 that are close to each other both have an inner wall profile that gradually tapers along the first direction. This ensures that when the clamping block 33 is in the second position, the two end faces of the drive sleeve 34 and the clamping block 33 can stably fit together, guaranteeing the stability of the clamping block 33. In practical use, the inner wall profile that gradually tapers along the first direction can also be provided on only one end face, as long as the drive sleeve 34 can drive the clamping block 33 to move to the second position when it moves along the first direction.

[0037] exist Figure 1a and Figure 1bIn the embodiment shown, the bearing portion 331 of the clamping block 33 is embedded in the gap between the metal seal 2 and the tubing hanger 1. That is, the mating portion of the metal seal 2 is the bottom end face of the metal seal 2. In some other embodiments, the mating portion of the metal seal 2 can be a groove that matches the bearing portion 331 and is radially opened along the first inner hole. When the clamping block 33 is in the second position, it can be embedded in the groove of the metal seal 2. Then, by pulling the guide rod 31, the clamping block 33 can apply a force to the metal seal 2 to disengage from the tubing hanger 1.

[0038] exist Figure 1a and Figure 1b In the illustrated embodiment, the support member 32 abuts against the support port 11 of the tubing hanger 1. In some other embodiments, the support member 32 and the tubing hanger 1 can use other matching or connection methods, as long as it can ensure that the support member 32 can provide stable support based on its matching with the tubing hanger 1 when the drive sleeve 34 squeezes the clamping block 33. The above content is only a list of preferred embodiments for explaining the technical solution of this utility model and should not be regarded as a limitation on the scope of protection of this application. In actual use, a suitable structure can be selected according to the actual working conditions.

[0039] In one preferred embodiment, the guide rod 31 is a threaded rod, and the inner side of the drive sleeve 34 is provided with an internal thread. The drive sleeve 34 is threadedly engaged with the guide rod 31. Rotating the drive sleeve 34 allows it to move axially along the guide rod 31. Based on this configuration, the drive sleeve 34 will only move along the guide rod 31 when rotated. Therefore, when the drive sleeve 34 drives the clamping block 33 to the second position, the drive sleeve 34 can maintain a stable position, thereby keeping the clamping block 33 in a stable state and ensuring the stability of the metal seal 2 during removal. Furthermore, the drive sleeve 34 can be further configured with an external hexagonal outline, allowing for operation with tools such as wrenches when rotating the drive sleeve 34, making it more convenient to use tools for removal.

[0040] It should be noted that the above embodiments are only preferred embodiments and should not be regarded as limitations on the present utility model. In some other embodiments, the guide rod 31 and the drive sleeve 34 can also adopt other matching methods. For example, the guide rod 31 is a smooth rod body, the drive sleeve 34 is sleeved on the guide rod, and the drive sleeve 34 is provided with a locking thread hole. When the drive sleeve 34 moves along the first direction and drives the clamping block 33 to move into place, the screw is screwed into the locking thread hole and the guide rod 31 is tightened. This can also lock the guide rod 31 and the drive sleeve 34 and ensure the stability of the metal seal 2 during the removal process.

[0041] Figure 2This is a schematic diagram of the structure of the tool for removing the metal seal of the tubing hanger provided in this embodiment of the utility model.

[0042] like Figure 1a , Figure 1b and Figure 2 As shown, in one preferred embodiment, the extraction tool 3 further includes a support plate 35 and a threaded sleeve 36. The support plate 35 has a second inner hole 351 for the guide rod 31 to pass through. The support plate 35 is connected to the tubing hanger via a support portion. The threaded sleeve 36 is installed on the side of the support plate 35 away from the support member 32. The threaded sleeve 36 is threadedly engaged with the guide rod 31, and the end face of the threaded sleeve 36 abuts against the end face of the second inner hole 351. When the threaded sleeve 36 is rotated, the internal thread of the threaded sleeve 36 applies a force away from the direction of the external thread of the guide rod 31, thereby lifting the guide rod 31. In this way, only the threaded sleeve 36 needs to be rotated to apply a stable and sufficiently strong lifting force to the guide rod 31 and the support member 32, improving the convenience and stability of the extraction tool 3.

[0043] Furthermore, a limiting structure can be provided at the support port 11 of the support member 32 and the tubing hanger 1 to limit the rotation of the support member 32 around the axis. For example, a keyway fit structure. In this way, when the drive sleeve 34 and the threaded sleeve 36 are rotated, the rotation of the guide rod 31 fixedly connected to the support member 32 around the axis is restricted, making the movement of the drive sleeve 34 along the guide rod 31 and the movement of the guide rod 31 along the threaded sleeve 36 more stable.

[0044] like Figure 2 As shown, in one preferred embodiment, the extraction tool 3 further includes a guide sleeve 37, which is fixedly installed in the second inner hole 351. The guide sleeve 37 has a third inner hole 371. The end of the drive sleeve 34 away from the support member 32 is located in the third inner hole 371 and matches the third inner hole 371. When the drive sleeve 34 moves in the first direction to drive the clamping block 33 to move, and when the threaded sleeve 36 drives the guide rod 31 to move, the drive sleeve 34 and the guide sleeve 37 cooperate to limit the movement, thereby improving the accuracy of the movement direction and the stability of the movement.

[0045] exist Figure 2In the illustrated embodiment, the guide sleeve 37 has a stepped outer contour, with its small-diameter end passing through the second inner hole 351. The stepped surface mates with a countersunk hole in the second inner hole 351. A screw is provided on the support plate 35 outside the stepped surface. The screw is screwed into the threaded hole of the support plate 35, and the head of the screw presses the guide sleeve 37 tightly onto the support plate 35. The threaded sleeve 36 and the guide sleeve 37 abut against each other. A gasket is also provided between the threaded sleeve 36 and the guide sleeve 37. When the threaded sleeve 36 is rotated to pull the guide rod 31, the metal seal 2 applies a large reaction force to the threaded sleeve 36 through the guide rod 31, making the threaded sleeve 36 and the guide sleeve 37 fit tightly together. The gasket prevents the threaded sleeve 36 from scratching the guide sleeve 37.

[0046] In some other embodiments, a ball bearing may be provided between the threaded sleeve 36 and the guide sleeve 37, with the outer ring of the bearing abutting against the guide sleeve 37 and the inner ring mounted on the third inner hole 371, and the end face of the other side of the inner ring abutting against the threaded sleeve 36.

[0047] Furthermore, such as Figure 2 As shown, in one preferred embodiment, the support plate 35 has several mounting holes. The support part includes a threaded support rod 38 passing through the mounting holes, and nuts mounted on the threaded support rod 38 on both sides of the mounting holes. The nuts abut against the end faces of the mounting holes. The threaded support rod 38 is supported on the support platform 12 of the tubing hanger 1. When the support part 35 is subjected to the reaction force applied by the metal seal 2 through the guide rod 31 and the threaded sleeve 36, it can be stably supported on the support platform 12 by the threaded support rod. Furthermore, by adjusting the position of the nuts on the threaded support rod 38, the axial position of the support plate 35 on the threaded support rod 38 can also be adjusted, so that the support plate 35 and the guide sleeve 37 installed on it can maintain a good relative position with respect to the drive sleeve 34 and the guide rod 31, making it easier to use.

[0048] Furthermore, in one preferred embodiment, a level is provided on the support plate 35. When adjusting the position of the support plate 35 on the threaded support rod 38, the level is observed to ensure the levelness of the support plate 35. This allows the removal tool 3 to apply a vertical upward lifting force to the metal seal 2, which is more conducive to removing the metal seal 2.

[0049] It should be noted that, in Figure 2 In the embodiment shown, the support plate 35 is supported on the support platform 12 by the support part. In some other embodiments, the support part can be adapted to the actual application conditions such as the structure of the oil pipe hanger, which will not be described in detail here.

[0050] Figure 3a and Figure 3bThis is a schematic diagram showing the positional changes of the clamping block of the tool for removing the metal seal of the tubing hanger provided in this embodiment of the utility model under two states.

[0051] like Figure 1b , Figure 3a as well as Figure 3b As shown, the bearing part 331 is a boss that extends radially outward from the guide rod 31 on the clamping block 33. The end face of the boss that contacts the metal seal 2 is perpendicular to the first direction. In this way, when the retrieval tool 3 is pulled up, the bearing surface of the bearing part 331 can apply a vertically upward force to the metal seal 2, which is more conducive to removing the metal seal 2.

[0052] The bearing surface can also be a surface of other shapes and directions. For example, in some other embodiments, the bearing surface at the top of the boss is an inclined surface extending along the first direction and toward the guide rod 31. The metal seal 2 is provided with a contact surface that can cooperate with the inclined surface. When the two inclined surfaces contact and apply force, the bearing surface can also apply a radially inward component force to the metal seal 2, which is more conducive to separating the metal seal 2 and the oil pipe hanger 1.

[0053] In one preferred embodiment, the locking block 33 further includes a limiting surface 332, which extends from the end of the bearing portion 331 near the guide rod in a direction away from the support member 32. When the locking block 33 moves to the second position, the limiting surface 332 can conform to the wall of the first inner hole 21, thereby limiting the range of motion of the locking block 33. Furthermore, as... Figure 1b As shown, after the limiting surface 332 is fitted with the first inner hole 21, a limiting structure for the clamping block 33 can also be formed. The inner side of the clamping block 33 is tightly attached to the drive sleeve 34, and the outer side is tightly attached to the metal seal 2, which can ensure stability during the removal process.

[0054] Furthermore, the outer contour dimension of the limiting surface 332 can be set to gradually increase along the first direction, and the inner wall of the first inner hole 21 is provided with a mating surface 22 with the same shape as the limiting surface 332. When the clamping block 33 moves towards the metal seal 2, the limiting surface 332 can fit against the mating surface 22, such as... Figure 1b As shown, this can further restrict the relative movement of the clamping block 33 and the metal seal 2 after they are in contact, thereby improving the stability during the removal process.

[0055] Figure 3a This is a schematic diagram showing the clamping block 33 in the first position. Figure 3bThis is a schematic diagram of the clamping block 33 in the second position. It can be seen that when the clamping block 33 is in the first position, the supporting part 331 is located inside the first inner hole 21. When the clamping block 33 is in the second position, the supporting part 331 protrudes from the first inner hole 21, that is, it is located on one side of the axial direction of the solid part of the metal seal 2. It should be noted that this is for ease of description and understanding of the technical solution of this utility model. Figure 3a and Figure 3b The physical structure of the metal seal 2 and the guide sleeve 34 is not shown in the figure.

[0056] In addition, Figure 3a and Figure 3b In the embodiment shown, four clamping blocks 33 are arranged circumferentially around the guide rod 31. In some other embodiments, the number of clamping blocks 33 may be different, as long as the stability of the contact between the metal seals 2 by the bearing part 331 is ensured.

[0057] like Figure 1b As shown, in one preferred embodiment, the guide structure includes a slider 333 and a groove 321 respectively disposed on two end faces of the clamping block 33 and the support member 32 that are close to each other. The slider 333 can slide back and forth in the groove 321, which extends radially along the guide rod 31, thereby enabling the guide structure to limit the movement of the clamping block 33 between a first position and a second position along the radial direction of the guide rod 31.

[0058] Furthermore, the slider 333 and the groove 321 can be fitted with a T-block and a T-slot, such as... Figure 1b As shown, the slider 333 has a T-shaped structure, and the vertical part of the T-shaped block passes through the vertical groove of the T-shaped groove and is installed on the clamping block 33. The width of the horizontal part of the T-shaped block is greater than the width of the vertical groove of the T-shaped groove, and the horizontal part of the T-shaped block abuts against the horizontal groove surface of the T-shaped groove. In this way, the support member 32 can limit the clamping block 33 with multiple degrees of freedom through the guide structure, which can improve the stability of the movement of the clamping block 33.

[0059] When the slide 321 adopts a T-slot structure, the slider 333 can be made of screws, with the threaded part of the screw serving as the vertical part of the T-block and the head of the screw serving as the horizontal part of the T-block. A mounting threaded hole 334 for mounting the screw can be provided on the clamping block 33 (e.g., ...). Figure 3a As shown), when installing the removal tool 3, the clamping block 33 is placed in the corresponding position of the support 32, and then the screw is screwed into the mounting threaded hole 334 through the T-slot until the head of the screw fits against the groove surface of the T-slot. This can reduce production costs and improve the convenience of installing and connecting the slider 333 and the clamping block 33.

[0060] Other structures can also be used for the guide structure, as long as they can limit the movement of the clamping block 33 relative to the support member 32. This will not be elaborated here.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solution of this utility model do not depart from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered by the claims of this utility model.

Claims

1. A tubing hanger metal seal extraction tool for assisting extraction of an interference fit installed metal seal on a tubing hanger port, characterized by, The metal seal has a first inner hole, and the extraction tool comprises: a guide rod; a supporting member connected with the guide rod and capable of abutting against a supporting port of the tubing hanger after penetrating through the first inner hole; a clamping block arranged on an upper surface of the supporting member, wherein a plurality of clamping blocks are arranged in a circumferential direction of the guide rod, and a bearing portion is further arranged on the clamping block, the bearing portion extending from a side of the clamping block away from the guide rod to a side close to the metal seal, and a matching portion close to the clamping block is arranged on the metal seal and capable of being embedded with the bearing portion; a guide structure arranged on the supporting member and extending in a radial direction of the first inner hole, and the clamping block is in sliding cooperation with the guide structure; a driving sleeve movably arranged on the guide rod in an axial direction, and the driving sleeve is located at an end of the clamping block away from the supporting member; at least one of the driving sleeve and the clamping block is provided with a driving surface, and the other is provided with a driving cooperation surface matched with the driving surface, and the distance between the plane where the driving surface is located and the axis of the guide rod gradually decreases in the direction from the driving sleeve to the supporting member.

2. The tubing hanger metal seal retrieval tool of claim 1, wherein, An external thread is arranged on the guide rod, the driving sleeve is in threaded cooperation with the guide rod, and when the driving sleeve is rotated relative to the guide rod, the driving sleeve moves in the axial direction of the guide rod.

3. The tubing hanger metal seal retrieval tool of claim 2, wherein, The extraction tool further comprises: a supporting plate, wherein a second inner hole for penetrating the guide rod is arranged on the supporting plate, and the supporting plate is connected to the tubing hanger through a supporting portion; a threaded sleeve, wherein the threaded sleeve is in threaded cooperation with the guide rod, and the end surface of the threaded sleeve abuts against the end surface of the side of the second inner hole away from the supporting member.

4. The extraction tool of the tubing hanger metal seal according to claim 3, further comprising a guide sleeve, wherein the guide sleeve is fixedly installed in the second inner hole, a third inner hole is arranged on the guide sleeve, the end of the driving sleeve away from the supporting member is located in the third inner hole, and the outer wall surface of the part of the driving sleeve located in the third inner hole matches the inner wall surface of the third inner hole. A plurality of mounting holes are arranged on the supporting plate, the supporting portion comprises a threaded supporting rod penetrating through the mounting holes, and mounting nuts are mounted on the threaded supporting rod and located on both sides of the mounting holes, and the mounting nuts abut against the end surfaces of the mounting holes.

5. The tubing hanger metal seal retrieval tool of claim 3, wherein, A level is arranged on the supporting plate.

6. The tubing hanger metal seal retrieval tool of claim 5, wherein, The end surface of the bearing portion in contact with the metal seal is perpendicular to the axial direction of the first inner hole.

7. The tubing hanger metal seal retrieval tool of claim 1, wherein, The clamping block further has a limiting surface, the limiting surface extends from the end of the bearing portion close to the guide rod to the direction away from the supporting member, and when the clamping block moves in the direction away from the guide rod, the limiting surface can abut against the wall surface of the first inner hole to limit the movable range of the clamping block.

8. The tubing hanger metal seal retrieval tool of claim 1, wherein, ​ 9. The tubing hanger metal seal retrieval tool of claim 8, wherein, The outer contour size of the limiting surface gradually increases along the axial direction of the first inner hole, and the inner wall of the first inner hole is provided with a matching surface with the same shape as the limiting surface.

10. The tubing hanger metal seal retrieval tool of claim 1, wherein, The guiding structure comprises: A sliding block and a sliding groove are respectively arranged on the clamping block and the supporting member, the sliding groove extends along the radial direction of the guiding rod, and the sliding block can reciprocatingly slide in the sliding groove.

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