Taking-out tool for metal sealing element of tubing hanger

Abstract

The invention relates to the field of operation tools and tools, in particular to an oil pipe hanger metal sealing piece taking-out tool which comprises a guide rod, a bearing piece, a clamping block and a driving sleeve, and the taking-out tool can enter the metal sealing piece and an end opening of an 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] The invention relates to the field of working tool tools, and in particular to a tool for removing a metal seal of an oil pipe hanger. Background Art

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

[0003] Therefore, it is necessary to provide a tool for removing the metal seal of the tubing hanger, which can stably and conveniently remove the metal seal. Summary of the invention

[0004] In order to achieve the above technical effects, the present invention provides a tool for removing a metal seal of a tubing hanger, which is used to assist in removing a metal seal installed by interference fit on a port of a tubing hanger, wherein the metal seal has a first inner hole, and the removal tool comprises:

[0005] Guide rod;

[0006] A supporting member connected to the guide rod, and the supporting member can penetrate the first inner hole and abut against the supporting port of the tubing hanger;

[0007] A clamping block is arranged on the upper surface of the bearing member, and a plurality of the clamping blocks are arranged, and the plurality of the clamping blocks are circumferentially distributed around the guide rod. A bearing portion is also arranged on the clamping block, and the bearing portion is extended from a side of the clamping block away from the guide rod to a side close to the metal seal. A matching portion capable of being embedded and matched with the bearing portion is arranged on a side of the metal seal close to the clamping block;

[0008] A guide structure is provided on the supporting member, and the guide structure is extended along the radial direction of the first inner hole, and the clamping block is slidably matched with the guide structure;

[0009] A drive sleeve is movably arranged on the guide rod along the axial direction, and the drive sleeve is located at one end of the clamping block away from the supporting 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 matching surface matching with the drive surface, and in the direction from the drive sleeve toward the supporting member, the distance between the plane where the drive surface is located and the axis of the guide rod gradually decreases.

[0010] Preferably, the guide rod is provided with an external thread, and the drive sleeve is threadably matched with the guide rod, and when the drive sleeve is rotated relative to the guide rod, the drive sleeve moves axially along the guide rod.

[0011] Preferably, the removal tool further comprises:

[0012] A support plate, wherein a second inner hole for inserting the guide rod is formed on the support plate, and the support plate is connected to the tubing hanger through a support portion;

[0013] A threaded sleeve, wherein the threaded sleeve is threadably matched with the guide rod, and an end surface of the threaded sleeve abuts against an end surface of the second inner hole on a side away from the supporting member.

[0014] Preferably, it also includes a guide sleeve, which is fixedly installed in the second inner hole, and a third inner hole is formed on the guide sleeve, and one end of the drive sleeve away from the supporting member is located in the third inner hole, and the outer wall surface of the portion of the drive sleeve located in the third inner hole matches the inner wall surface of the third inner hole.

[0015] Preferably, a plurality of mounting holes are formed on the support plate, and the support portion comprises a threaded support rod passing through the mounting hole, and mounting nuts mounted on the threaded support rod and located on both sides of the mounting hole, and the mounting nuts are both in contact with the end faces of the mounting holes.

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

[0017] Preferably, an end surface of the bearing portion in contact with 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 close to the guide rod in a direction away from the supporting member. When the clamping block moves in a direction away from the guide rod, the limiting surface can fit the wall of the first inner hole to limit the movable range of the clamping block.

[0019] Preferably, 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, and when the clamping block moves toward the metal seal, the limiting surface can fit with the matching surface.

[0020] Preferably, the guiding structure comprises:

[0021] A slider and a slide groove are respectively arranged on the clamping block and the supporting member, the slide groove extends along the radial direction of the guide rod, and the slider can slide back and forth in the slide groove.

[0022] By applying the technical solution provided by the present invention, the guide rod, the supporting member and the clamping block of the removal tool can enter the metal seal and the port of the oil pipe hanger through the first inner hole of the metal seal, and the supporting member can abut against the supporting port of the oil pipe hanger. When the driving sleeve on the guide rod moves toward the clamping block, it can cooperate with the supporting member to squeeze the clamping block to expand outward, so that the bearing part of the clamping block is embedded in the recessed part opened on the inner wall of the first inner hole of the metal seal or in the axial gap between the metal seal and the end face of the oil pipe hanger. At this time, the guide rod is lifted, and the bearing part of the clamping block can abut against the corresponding part of the metal seal and transmit the external force applied to the guide rod to the clamping block, so that the metal seal is subjected to a force axially away from the oil pipe hanger, thereby removing the metal seal. The installation and use process of the removal 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 oil pipe hanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1a and Figure 1b It is a schematic structural diagram of a tool for removing a metal seal of a tubing hanger provided by an embodiment of the present invention in two states;

[0024] Figure 2 It is a structural schematic diagram of a tool for removing a metal seal of a tubing hanger provided by an embodiment of the present invention;

[0025] Figure 3a and Figure 3b It is a schematic diagram of position changes of a clamping block of a tool for removing a metal seal of a tubing hanger provided by an embodiment of the present invention in two states;

[0026] Among them, 1. tubing hanger; 11. support port; 12. support platform; 2. metal seal; 21. first inner hole; 22. mating surface; 3. removal tool; 31. guide rod; 32. supporting member; 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 DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Figure 1a and Figure 1b The figure is a schematic diagram of the structure of a tool for removing a metal seal of a tubing hanger provided by an embodiment of the present invention in two states.

[0029] like Figure 1a and Figure 1b As shown, an embodiment of the present invention provides a tool for removing a metal seal of a tubing hanger, which is used to assist in removing a metal seal 2 installed by interference fit on a port of a tubing hanger 1, wherein the metal seal 2 is an annular structure with a first inner hole 21 in the middle;

[0030] The removal tool 3 includes a guide rod 31, a supporting member 32, a clamping block 33 and a driving sleeve 34. The supporting member 32 is fixedly connected to the guide rod 31. The outer contour of the supporting member 32 along the radial direction is smaller than the inner contour of the first inner hole 21. A plurality of clamping blocks 33 are arranged on the supporting member 32, and the plurality of clamping blocks 33 are circumferentially spaced around the guide rod 31. A guiding structure is arranged between the supporting member 32 and the clamping block 33, so as to limit the clamping block 33 to move only along the radial direction of the guide rod 31.

[0031] The driving sleeve 34 is movably arranged on the guide rod 31 along the axial direction and is located on the side of the clamping block 33 away from the supporting member 32. The end of the driving sleeve 34 close to the clamping block 33 and / or the end of the clamping block 33 close to the driving sleeve 34 have an inner wall profile that gradually shrinks along a first direction. The first direction is the direction from the clamping block 33 to the supporting member 32 along the axial direction of the guide rod 31. Figure 1a In the embodiment shown, the first direction is the vertical downward direction;

[0032] When the removal tool 3 is in use, the removal tool 3 is installed on 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 driving sleeve 34 moves along the first direction, the driving sleeve 34 and the support member 32 squeeze the clamping block 33, driving the clamping block 33 to move toward the first inner hole 21 and make the bearing portion 331 cooperate with the matching portion. At this time, the guide rod is lifted to remove the metal seal.

[0033] In addition, the movement range of the clamping block 33 can be limited by the guiding structure, so that the clamping block 33 can move between a first position close to the guide rod 31 and a second position away from the guide rod 31, and when the clamping block 33 is in the first position, it is located on the radial inner side of the first inner hole, so that the clamping block 33 can smoothly pass through the first inner hole 21 with the supporting member 32, and when the clamping block 33 is in the second position, the bearing portion 331 of the clamping block 33 can be embedded in the mating portion on the metal seal 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 when in the second position can also be limited by the guide structure, such as Figure 1a and Figure 1b As shown, when the clamping block 33 is located at the second position, the bearing portion 331 is just embedded in the gap between the metal seal 2 and the tubing hanger 1 and does not contact the inner wall of the tubing hanger 1 to generate friction.

[0035] like Figure 1a As shown, when the clamping blocks 33 are in the first position, the clamping blocks 33 are located radially inward of the first inner hole 21, so that the removal tool 3 can pass through the first inner hole 21 in the axial direction. Figure 1b As shown, when the clamping block 33 is in the second position, the bearing portion 331 of the clamping block 33 is on the radially outer side of the first inner hole 21, that is, it has been embedded in the matching portion of the metal seal 2. At this time, the guide rod 31 is pulled in a direction opposite to the first direction, and the pulling force is applied to the metal seal 2 by the bearing portion 331 through the switching action of the supporting member 32 and the clamping block 33, and the force is a stable static contact force. When the 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 driving sleeve 34 and the clamping block 33 that are close to each other are provided with an inner wall profile that gradually shrinks along the first direction, so that when the clamping block 33 is in the second position, the two end faces of the driving sleeve 34 and the clamping block 33 can be stably fitted to ensure the stability of the clamping block 33. In actual use, the inner wall profile that gradually shrinks along the first direction can also be provided on only one of the end faces, as long as the driving 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 1b In the illustrated embodiment, 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 matching portion of the metal seal 2 is the bottom end surface of the metal seal 2. In some other embodiments, the matching portion of the metal seal 2 may be a groove that is opened along the radial direction of the first inner hole and matches the bearing portion 331. 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 separate from the tubing hanger 1.

[0038] exist Figure 1a and Figure 1bIn the embodiment shown, the supporting member 32 abuts against the supporting port 11 of the tubing hanger 1. In some other embodiments, the supporting member 32 and the tubing hanger 1 may be matched or connected in other ways, as long as it can be ensured that when the driving sleeve 34 squeezes the clamping block 33, the supporting member 32 can provide stable support based on the cooperation with the tubing hanger 1. The above content is only for explaining the preferred embodiments listed in the technical solution of the present invention, and should not be regarded as limiting the scope of protection of the present application. In actual use, a suitable structure can be selected according to 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 matched with the guide rod 31. The drive sleeve 34 can be rotated to make the drive sleeve 34 move axially along the guide rod 31. Based on such a setting, the drive sleeve 34 will move along the guide rod 31 only when the drive sleeve 34 is rotated. Therefore, when the drive sleeve 34 drives the clamping block 33 to be located in the second position, the drive sleeve 34 can maintain a stable position, thereby making the clamping block 33 in a stable state, ensuring the stability of the metal seal 2 during the removal process. In addition, the drive sleeve 34 can be further configured to have an outer hexagonal outer contour. When the drive sleeve 34 is rotated, the operation can be implemented by a tool such as a wrench, which is more convenient for the use of the removal tool.

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

[0041] Figure 2 It is a schematic diagram of the structure of a tool for removing a metal seal of a tubing hanger provided in an embodiment of the present invention.

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

[0043] Furthermore, a limiting structure can be provided at the supporting member 32 and the supporting port 11 of the tubing hanger 1 to limit the rotation of the supporting member 32 around the axis, such as a keyway fitting 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 supporting member 32 around the axis is limited, so that 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 are more stable.

[0044] like Figure 2 As shown, in one of the preferred embodiments, the removal tool 3 also includes a guide sleeve 37, which is fixedly installed in the second inner hole 351. A third inner hole 371 is provided on the guide sleeve 37. The end of the drive sleeve 34 away from the supporting 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 driving sleeve 34 and the guide sleeve 37 are used to limit the movement, thereby improving the accuracy of the movement direction and the stability of the movement.

[0045] exist Figure 2 In the embodiment shown, the outer contour of the guide sleeve 37 is stepped, and its small diameter end passes through the second inner hole 351, and the step surface cooperates with the countersunk hole opened on the second inner hole 351. A screw is provided on the support plate 35 outside the step surface, and the screw is screwed into the threaded hole of the support plate 35 and the head of the screw presses the guide sleeve 37 on the support plate 35, and 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, so that the threaded sleeve 36 and the guide sleeve 37 are closely fitted. The gasket is provided therein to prevent the threaded sleeve 36 from scratching the guide sleeve 37.

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

[0047] Further, such as Figure 2 As shown, in one preferred embodiment, a plurality of mounting holes are provided on the support plate 35, and the support portion includes a threaded support rod 38 passing through the mounting hole, and nuts mounted on the threaded support rod 38 and located on both sides of the mounting hole, the nuts are in contact with the end faces of the mounting hole, and the threaded support rod 38 is supported on the support platform 12 of the tubing hanger 1. When the support portion 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 through the threaded support rod. In addition, by adjusting the position of the nut 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 mounted thereon can maintain a good relative position relative to the drive sleeve 34 and the guide rod 31, which is more convenient to use.

[0048] Furthermore, in one of the preferred embodiments, a spirit level is provided on the support plate 35. When adjusting the position of the support plate 35 on the threaded support rod 38, observing the spirit level simultaneously can ensure the horizontality of the support plate 35, thereby enabling the removal tool 3 to apply a vertical upward pulling 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 illustrated embodiment, the support plate 35 is supported on the support platform 12 via a support portion. In some other embodiments, the support portion may be adaptively adjusted according to actual application conditions such as the structure of the tubing hanger, which will not be elaborated herein.

[0050] Figure 3a and Figure 3b The figure is a schematic diagram showing the position change of the clamping block of the removal tool for the metal seal of the tubing hanger provided by the embodiment of the present invention in two states.

[0051] like Figure 1b , Figure 3a as well as Figure 3b As shown, the bearing portion 331 is a boss formed on the clamping block 33 and extending radially outward along the guide rod 31. The end surface of the boss in contact with the metal seal 2 is perpendicular to the first direction. In this way, when the recovery tool 3 is lifted, the bearing surface of the bearing portion 331 can apply a vertical upward force to the metal seal 2, which is more conducive to removing the metal seal 2.

[0052] The bearing surface may 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 in the direction 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 of 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 clamping block 33 further has a limiting surface 332, which is formed by extending from one end of the bearing portion 331 close to the guide rod in a direction away from the supporting member 32. When the clamping block 33 moves to the second position, the limiting surface 332 can fit the wall surface of the first inner hole 21, thereby limiting the range of movement of the clamping block 33. 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 against the driving sleeve 34, and the outer side is tightly against the metal seal 2, which can ensure stability during the removal process.

[0054] Further, the outer contour size of the limit 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 matching surface 22 with the same shape as the limit surface 332. When the clamping block 33 moves toward the metal seal 2, the limit surface 332 can fit with the matching surface 22. Figure 1b As shown, the relative movement between the clamping block 33 and the metal seal 2 after being fitted together can be further limited, thereby improving the stability during the removal process.

[0055] Figure 3a is a schematic diagram when the clamping block 33 is in the first position, Figure 3b 3 is a schematic diagram when the clamping block 33 is in the second position. It can be seen that when the clamping block 33 is in the first position, the bearing portion 331 is located on the inner side of the first inner hole 21. When the clamping block 33 is in the second position, the bearing portion 331 protrudes from the first inner hole 21, that is, it is located on one side of the physical part of the metal seal 2 along the axial direction. It should be noted that in order to facilitate the description and understanding of the technical solution of the present invention, Figure 3a and Figure 3b The physical structure of the metal seal 2 and the guide sleeve 34 is not shown.

[0056] In addition, Figure 3a and Figure 3b In the illustrated embodiment, four clamping blocks 33 are arranged at circumferential intervals around the guide rod 31. In some other embodiments, the clamping blocks 33 may be of other numbers as long as the stability of the contact between the bearing portion 331 and the metal seal 2 is ensured.

[0057] like Figure 1bAs shown, in one of the preferred embodiments, the guide structure includes a slider 333 and a slide groove 321 respectively arranged on two end surfaces of the clamping block 33 and the supporting member 32 close to each other. The slider 333 can slide back and forth in the slide groove 321, and the slide groove 321 extends along the radial direction of the guide rod 31, so that the guide structure can limit the clamping block 33 to move between the first position and the second position along the radial direction of the guide rod 31.

[0058] Furthermore, the slider 333 and the slide groove 321 can be matched 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-block is installed on the clamping block 33 through the vertical groove body of the T-slot, the width of the transverse part of the T-block is greater than the width of the vertical groove body of the T-slot, and the transverse part of the T-block abuts against the transverse groove surface of the T-slot, so that the supporting 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 groove 321 adopts a T-slot structure, the slider 333 can adopt a screw, with the threaded rod of the screw as the vertical part of the T-block, and the head of the screw as the horizontal part of the T-block. A mounting threaded hole 334 (such as Figure 3a As shown), when installing the removal tool 3, the clamping block 33 is placed at the corresponding position of the supporting member 32, and then the screw is screwed into the mounting threaded hole 334 through the T-slot until the head of the screw fits with the groove surface of the T-slot, which can reduce production costs and improve the convenience of installation and connection between the slider 333 and the clamping block 33.

[0060] The guide structure may also adopt other structures as long as it can limit the movement of the clamping block 33 relative to the supporting member 32, which will not be described in detail here.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention and should be included in the scope of the claims of the present invention.

Claims

1. A tool for removing a metal seal of a tubing hanger, used to assist in removing a metal seal installed by interference fit on a tubing hanger port, characterized in that: The metal seal has a first inner hole, and the removal tool comprises: Guide rod; A supporting member connected to the guide rod, and the supporting member can penetrate the first inner hole and abut against the supporting port of the tubing hanger; A clamping block is arranged on the upper surface of the bearing member, and a plurality of the clamping blocks are arranged, and the plurality of the clamping blocks are circumferentially distributed around the guide rod. A bearing portion is also arranged on the clamping block, and the bearing portion is extended from a side of the clamping block away from the guide rod to a side close to the metal seal. A matching portion capable of being embedded and matched with the bearing portion is arranged on a side of the metal seal close to the clamping block; A guide structure is provided on the supporting member, and the guide structure is extended along the radial direction of the first inner hole, and the clamping block is slidably matched with the guide structure; A drive sleeve is movably arranged on the guide rod along the axial direction, and the drive sleeve is located at one end of the clamping block away from the supporting 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 matching surface matching with the drive surface, and in the direction from the drive sleeve toward the supporting member, the distance between the plane where the drive surface is located and the axis of the guide rod gradually decreases.

2. The removal tool for the metal seal of the tubing hanger according to claim 1, characterized in that: The guide rod is provided with an external thread, and the drive sleeve is threadedly matched with the guide rod. When the drive sleeve is rotated relative to the guide rod, the drive sleeve moves axially along the guide rod.

3. The removal tool for the metal seal of the tubing hanger according to claim 2, characterized in that: The removal tool also includes: A support plate, wherein a second inner hole for inserting the guide rod is formed on the support plate, and the support plate is connected to the tubing hanger through a support portion; A threaded sleeve, wherein the threaded sleeve is threadably matched with the guide rod, and an end surface of the threaded sleeve abuts against an end surface of the second inner hole on a side away from the supporting member.

4. The removal tool for the metal seal of the tubing hanger according to claim 3, characterized in that: It also includes a guide sleeve, which is fixedly installed in the second inner hole. A third inner hole is opened on the guide sleeve. The end of the drive sleeve away from the supporting member is located in the third inner hole, and 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.

5. The removal tool for the metal seal of the tubing hanger according to claim 3, characterized in that: The support plate is provided with a plurality of mounting holes, and the support portion comprises a threaded support rod passing through the mounting hole, and mounting nuts mounted on the threaded support rod and located on both sides of the mounting hole, and the mounting nuts are both in contact with the end faces of the mounting holes.

6. The removal tool for the metal seal of the tubing hanger according to claim 5, characterized in that: A level is arranged on the support plate.

7. The removal tool for the metal seal of the tubing hanger according to claim 1, characterized in that: An end surface of the bearing portion in contact with the metal seal is perpendicular to an axial direction of the first inner hole.

8. The removal tool for the metal seal of the tubing hanger according to claim 1, characterized in that: The clamping block also has a limiting surface, which is formed by extending from one end of the bearing portion close to the guide rod in a direction away from the supporting member. When the clamping block moves in a direction away from the guide rod, the limiting surface can fit the wall of the first inner hole to limit the movable range of the clamping block.

9. The removal tool for the metal seal of the tubing hanger according to claim 8, characterized in that: 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. When the clamping block moves toward the metal seal, the limiting surface can fit with the matching surface.

10. The removal tool for a metal seal of a tubing hanger according to claim 1, characterized in that: The guiding structure comprises: A slider and a slide groove are respectively arranged on the clamping block and the supporting member, the slide groove extends along the radial direction of the guide rod, and the slider can slide back and forth in the slide groove.

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