Double-conical-surface hydraulic slip

Abstract

The utility model relates to the technical field of petroleum machinery, in particular to a double-conical-surface hydraulic slip. The double-conical-surface hydraulic slip comprises a slip bowl, a driving assembly and a plurality of slip assemblies, each slip assembly comprises a slip body unit and a middle body, and each middle body is located between the corresponding slip bowl and the corresponding slip body unit and is in sliding connection with the corresponding slip bowl and the corresponding slip body unit. The inner side wall and the outer side wall, matched with the slip bowl and the slip body unit respectively, of the middle body are conical surfaces, and the taper of the inner side wall of the middle body is smaller than that of the outer side wall of the middle body. When the driving assembly drives the middle body to move downwards along the inner side wall of the slip bowl, the slip body unit retracts inwards and moves downwards to clamp a pipe, and meanwhile the outer side wall of the slip body unit extrudes the inner side wall of the middle body and acts together with the counter-acting force applied to the middle body by the slip bowl. The middle body of the double-conical-surface structure has the trend of moving upwards so that the driving assembly can drive the middle body to move upwards next time, and the problem that a slip body unit in the slip assembly is not prone to being released is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum machinery, in particular to a double-conical hydraulic slip. Background Art

[0002] With the increasing efforts in oil exploration and development, higher requirements are put forward for wellhead tools. At present, the main tool for holding pipes in the oil and gas industry is the slip device. The outer side of the slip body in the slip device is a conical surface. After the tooth plate is installed in the tooth plate groove to hold the pipe, the center of the pipe is concentric with the outer conical surface of the slip body. After the force is applied, the entire outer conical surface of the slip body and the inner conical surface of the slip seat are completely overlapped. After bearing a large load, the outer conical surface of the slip body and the inner conical surface of the slip seat undergo elastic deformation. After unloading, the outer conical surface of the slip body is close to the inner conical surface of the slip seat, causing the slip body to jam the pipe and it is difficult to unjam, making the slip less reliable. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a double-conical hydraulic slip, which solves the technical problem that the slip body is difficult to unstuck.

[0005] (II) Technical solution

[0006] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0007] The embodiment of the utility model provides a double-conical hydraulic cava, comprising a cava seat, a driving assembly and a plurality of cava assemblies; the cava assembly comprises a cava body unit and an intermediate body, the intermediate body is located between the cava seat and the cava body unit and is slidably connected to the cava seat and the cava body unit respectively, the inner and outer side walls of the intermediate body respectively cooperate with the cava seat and the cava body unit and are both conical surfaces, and the taper of the inner side wall of the intermediate body is smaller than the taper of the outer side wall of the intermediate body; when the driving assembly simultaneously drives the intermediate bodies of the plurality of cava assemblies to move upward along the inner side wall of the cava seat, the cava body unit expands outward and moves upward to loosen the pipe fixture therein; when the driving assembly drives the intermediate body to move downward along the inner side wall of the cava seat, the cava body unit contracts and moves downward to clamp the pipe fixture, and at the same time the outer side wall of the cava body unit squeezes the inner side wall of the intermediate body.

[0008] Preferably, the taper of the inner wall of the intermediate body is 1:3; the taper of the outer wall of the intermediate body is 2:3.

[0009] Preferably, the driving assembly includes a driving member, a first transmission unit and multiple second transmission units; the driving member is vertically oriented and arranged on the cava seat, and the telescopic end of the driving member is connected to the first transmission unit to drive the intermediate body to move up and down along the cava seat through the first transmission unit; multiple second transmission units are arranged in a one-to-one correspondence with the intermediate body; when the intermediate body moves upward along the inner side wall of the cava seat, the intermediate body drives the cava body unit to move upward along the inner side wall of the intermediate body through the second transmission unit; when the intermediate body moves downward along the inner side wall of the cava seat, the cava body unit descends by its own weight, and after the intermediate body moves down into place, the second transmission unit presses down the cava body unit to squeeze the inner side wall of the intermediate body.

[0010] Preferably, the first transmission unit includes an annular connecting rod and multiple connecting rods; the multiple connecting rods are arranged in a one-to-one correspondence with the multiple intermediate bodies; the annular connecting rod is arranged in the cava seat and coaxially with the cava seat, and the telescopic end of the driving member is connected to the annular connecting rod to drive the annular connecting rod to move up and down; one end of the connecting rod is connected to the annular connecting rod, and the other end of the connecting rod is connected to the intermediate body; when the telescopic end of the driving member drives the annular connecting rod to move up and down, the annular connecting rod drives the intermediate body to move along the inner wall of the cava seat.

[0011] Preferably, each second transmission unit includes a driving column, a shift fork and a guide column; the shift fork is rotatably connected to one end of the intermediate body close to the adjacent intermediate body, a guide groove is provided on the shift fork, the guide column is arranged on the cava seat and located in the guide groove, the driving column is arranged on one side of the cava body unit, and one end of the shift fork forms an abutment end; when the intermediate body moves upward along the inner side wall of the cava seat, the guide column slides along the guide groove of the shift fork to the side close to the cava body unit, the shift fork rotates clockwise, and the abutment end of the shift fork pushes up the driving column to make the cava body unit move upward along the intermediate body; when the intermediate body moves downward along the inner side wall of the cava seat, the guide column slides along the guide groove of the shift fork to the side away from the cava body unit, the shift fork rotates counterclockwise, and at the same time the cava body unit descends by its own weight, and after the intermediate body moves down into place, the abutment end of the shift fork presses down the driving column to make the cava body unit move downward along the intermediate body and squeeze the inner side wall of the intermediate body.

[0012] Preferably, the abutting end of the shift fork comprises a first abutting block and a second abutting block which are arranged at intervals; the first abutting block is used to push up the driving column; and the second abutting block is used to press down the driving column.

[0013] Preferably, the driving assembly includes a first sliding column; a first sliding groove is opened on the outer wall of the intermediate body along the inclined direction; the first sliding column enters the first sliding groove after passing through the cava seat, and the first sliding column is slidably connected to the first sliding groove to limit the sliding of the intermediate body.

[0014] Preferably, the driving assembly includes a second sliding column; a second sliding groove is opened on the inner side wall of the intermediate body along the inclined direction; the second sliding column enters the second sliding groove after passing through the cava body unit, and the second sliding column is slidably connected to the second sliding groove to limit the sliding of the cava body unit.

[0015] Preferably, it also includes multiple groups of buffer components; the multiple groups of buffer components are arranged in one-to-one correspondence with the intermediate body; the buffer components include a guide rod and a spring; the guide rod is connected to the top outer edge of the cava body unit and the bottom end of the guide rod is spaced apart from the top end of the intermediate body; the spring is sleeved on the guide rod, and the bottom end of the spring abuts against the top end of the intermediate body, and the top end of the spring is spaced apart from the top outer edge of the cava body unit.

[0016] Preferably, the slip body unit comprises a slip body and a jaw seat which are detachably connected.

[0017] (III) Beneficial effects

[0018] The beneficial effects of the utility model are:

[0019] The double-conical hydraulic slip of the utility model comprises a slip seat, a driving assembly and a plurality of slip assemblies. Since the slip assembly comprises a slip body unit and an intermediate body, the intermediate body is located between the slip seat and the slip body unit and is respectively slidably connected with the slip seat and the slip body unit, and the inner and outer side walls of the intermediate body respectively matched with the slip seat and the slip body unit are both conical surfaces, and the taper of the inner side wall of the intermediate body is smaller than the taper of the outer side wall of the intermediate body. When the driving assembly drives the intermediate body to move downward along the inner side wall of the slip seat, the slip body unit retracts and moves downward to clamp the pipe, and at the same time, the outer side wall of the slip body unit squeezes the inner side wall of the intermediate body and acts together with the reaction force applied to the intermediate body by the slip seat, so that the intermediate body with the double-conical structure has a tendency to move upward so that the next time the driving assembly drives the intermediate body to move upward, thereby avoiding the problem that the slip body unit in the slip assembly is not easy to be unstuck, and improving the reliability of the slip. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a top view of the double-conical hydraulic slip of the utility model (the slip body unit is in the retracted clamping state);

[0021] Figure 2 It is a top view of the double-conical hydraulic slip of the utility model (the slip body unit is expanded and released);

[0022] Figure 3 It is a schematic diagram of the internal structure of the double-conical hydraulic slip part;

[0023] Figure 4 It is a partial longitudinal sectional view of the double-conical hydraulic slip (the slip body unit is in the retracted clamping state);

[0024] Figure 5It is a longitudinal cross-sectional view of the double-conical hydraulic slip (the slip body unit is in the retracted clamping state);

[0025] Figure 6 It is a partial longitudinal cross-sectional view of the double-conical hydraulic slip (slip body unit is expanded and unstuck state);

[0026] Figure 7 It is a longitudinal cross-sectional view of the double-conical hydraulic slip (slip body unit is expanded and unstuck state).

[0027] [Description of Reference Numerals]

[0028] 1: Slip seat;

[0029] 2: driving assembly; 21: driving member; 22: first transmission unit; 221: annular connecting rod; 222: connecting rod; 23: second transmission unit; 231: driving column; 232: shift fork; 233: guide column; 24: first sliding column; 25: second sliding column;

[0030] 3: slip assembly; 31: slip body unit; 311: slip body; 312: clamp tooth seat; 32: intermediate body;

[0031] 4: buffer assembly; 41: guide rod; 42: spring;

[0032] a: Pipe fittings. DETAILED DESCRIPTION

[0033] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0034] like Figure 1 As shown, this embodiment provides a double-conical hydraulic slip, which includes a slip seat 1, a drive assembly 2 and a plurality of slip assemblies 3, wherein the slip assemblies 3 each include a slip body unit 31 and an intermediate body 32, wherein the intermediate body 32 is located between the slip seat 1 and the slip body unit 31 and is slidably connected to the slip seat 1 and the slip body unit 31 respectively, and the inner and outer side walls of the intermediate body 32 respectively matched with the slip seat 1 and the slip body unit 31 are both conical surfaces. Among them, the taper of the inner side wall of the intermediate body 32 is smaller than the taper of the outer side wall of the intermediate body 32. In this embodiment, the taper of the inner side wall of the intermediate body 32 is preferably 1:3; the taper of the outer side wall of the intermediate body 32 is 2:3. The large taper surface of the outer side wall of the intermediate body 32 makes it easier to unstuck and reduce the rising distance, and the small taper surface of the inner side wall of the intermediate body 32 can ensure that the pipe a is stuck.

[0035] like Figure 1 As shown, when the driving assembly 2 drives the intermediate bodies 32 in the plurality of slip assemblies 3 to move upward along the inner side wall of the slip seat 1, the slip body units 31 expand outward and move upward to release the pipe a therein. Figure 2 As shown, when the driving component 2 simultaneously drives the intermediate bodies 32 in multiple cava components 3 to move downward along the inner wall of the cava seat 1, the cava body unit 31 retracts and moves downward to clamp the pipe a. Due to the different tapers of the inner and outer walls of the intermediate body 32, an angle is formed. At the same time, the outer wall of the cava body unit 31 squeezes the inner wall of the intermediate body 32 and the reaction force applied to the intermediate body 32 by the cava seat 1, so that the intermediate body 32 with a double-conical surface structure tends to move upward so that the next time the driving component 2 drives the intermediate body 32 to move upward, thereby avoiding the problem that the cava body unit 31 in the cava assembly 3 is difficult to unstuck, thereby improving the reliability of the cava.

[0036] like Figure 3 As shown, the driving assembly 2 includes a driving member 21, a first transmission unit 22 and a plurality of second transmission units 23. The driving member 21 is vertically oriented and arranged on the slip seat 1. The telescopic end of the driving member 21 is connected to the first transmission unit 22 so as to drive the intermediate body 32 to move up and down along the slip seat 1 through the first transmission unit 22. The plurality of second transmission units 23 are arranged one by one with the intermediate body 32. When the intermediate body 32 moves upward along the inner side wall of the slip seat 1, the intermediate body 32 drives the slip body unit 31 to move upward along the inner side wall of the intermediate body 32 through the second transmission unit 23. When the intermediate body 32 moves downward along the inner side wall of the slip seat 1, the slip body unit 31 descends by its own weight. After the intermediate body 32 moves down to the position, the second transmission unit 23 presses down the slip body unit 31 to squeeze the inner side wall of the intermediate body 32.

[0037] like Figure 3 and Figure 4 As shown, the first transmission unit 22 includes an annular connecting rod 221 and multiple connecting rods 222. The multiple connecting rods 222 are arranged in a one-to-one correspondence with the multiple intermediate bodies 32. To ensure the stability of the drive, every two connecting rods 222 are arranged in correspondence with one intermediate body 32. The annular connecting rod 221 is arranged in the cava seat 1 and is coaxially arranged with the cava seat 1. The telescopic end of the driving member 21 is connected to the annular connecting rod 221 to drive the annular connecting rod 221 to move up and down. One end of the connecting rod 222 is connected to the annular connecting rod 221, and the other end of the connecting rod 222 is connected to the intermediate body 32; when the telescopic end of the driving member 21 drives the annular connecting rod 221 to move up and down, the annular connecting rod 221 drives the intermediate body 32 to move along the inner wall of the cava seat 1.

[0038] like Figure 3 and Figure 4 As shown, each second transmission unit 23 includes a driving column 231, a fork 232 and a guide column 233. The fork 232 is rotatably connected to one end of the intermediate body 32 close to the adjacent intermediate body 32. A guide groove is provided on the fork 232. The guide column 233 is arranged on the cava seat 1 and is located in the guide groove. The driving column 231 is arranged on one side of the cava body unit 31, and one end of the fork 232 forms an abutment end.

[0039] like Figure 6 and Figure 7 As shown, when the intermediate body 32 moves upward along the inner side wall of the slip seat 1, the guide column 233 slides along the guide groove of the fork 232 toward the side close to the slip body unit 31, the fork 232 rotates clockwise, and the abutting end of the fork 232 pushes the driving column 231 upward to make the slip body unit 31 move upward along the intermediate body 32. Figure 4 and Figure 5 As shown, when the intermediate body 32 moves downward along the inner side wall of the slip seat 1, the guide column 233 slides along the guide groove of the fork 232 to the side away from the slip body unit 31, and the fork 232 rotates counterclockwise. At the same time, the slip body unit 31 descends by its own weight. After the intermediate body 32 moves down to the right position, the abutting end of the fork 232 presses down the driving column 231 to make the slip body unit 31 move downward along the intermediate body 32 and squeeze the inner side wall of the intermediate body 32. The abutting end of the fork 232 includes a first abutting block and a second abutting block arranged at intervals; the first abutting block is used to push up the driving column 231, and the second abutting block is used to press down the driving column 231.

[0040] like Figure 5 and Figure 7 As shown, in order to realize the sliding between the intermediate body 32 and the cava seat 1, and between the intermediate body 32 and the cava body unit 31, the driving assembly 2 also includes a first sliding column 24 and a second sliding column 25. A first sliding groove is opened on the outer wall of the intermediate body 32 along the inclined direction. The first sliding column 24 enters the first sliding groove after passing through the cava seat 1. The first sliding column 24 is slidably connected to the first sliding groove. Since the first sliding groove is provided with upper and lower ends, the first sliding column 24 can limit the sliding of the intermediate body 32.

[0041] A second sliding groove is opened on the inner side wall of the intermediate body 32 along the inclined direction. The second sliding column 25 enters the second sliding groove after passing through the cava body unit 31. The second sliding column 25 is slidably connected to the second sliding groove. Since the second sliding groove is provided with an upper end, the second sliding column 25 can limit the sliding of the cava body unit 31.

[0042] like Figure 4As shown, in order to reduce the shock when the slip body unit 31 falls, the double-conical hydraulic slip also includes multiple groups of buffer components 4, and the multiple groups of buffer components 4 are arranged one by one with the intermediate body 32. The buffer component 4 includes a guide rod 41 and a spring 42. The guide rod 41 is connected to the top outer edge of the slip body unit 31, and the bottom end of the guide rod 41 is spaced apart from the top of the intermediate body 32. The spring 42 is sleeved on the guide rod 41, and the bottom end of the spring 42 abuts against the top of the intermediate body 32, and the top of the spring 42 is spaced apart from the top outer edge of the slip body unit 31. When the slip body unit 31 falls, the spring 42 is in a compressed state. When the slip body unit 31 is in a state of releasing the pipe a, the spring 42 is in a reset state, that is, it is not subjected to force.

[0043] In this embodiment, the slip body unit 31 includes a slip body 311 and a jaw seat 312 that are detachably connected, thereby facilitating replacement of the jaw seat 312 .

[0044] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0047] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0048] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A double-conical hydraulic slip, characterized in that: It comprises a slip seat (1), a drive assembly (2) and a plurality of slip assemblies (3); The slip assembly (3) comprises a slip body unit (31) and an intermediate body (32); the intermediate body (32) is located between the slip seat (1) and the slip body unit (31) and is slidably connected to the slip seat (1) and the slip body unit (31) respectively; the inner and outer side walls of the intermediate body (32) respectively matched with the slip seat (1) and the slip body unit (31) are both conical surfaces; the taper of the inner side wall of the intermediate body (32) is smaller than the taper of the outer side wall of the intermediate body (32); When the driving assembly (2) simultaneously drives the intermediate bodies (32) of the plurality of slip assemblies (3) to move upward along the inner side wall of the slip seat (1), the slip body units (31) expand outward and move upward to release the pipes (a) therein; When the driving assembly (2) drives the intermediate body (32) to move downward along the inner wall of the cava seat (1), the cava body unit (31) retracts and moves downward to clamp the pipe (a), and at the same time, the outer wall of the cava body unit (31) squeezes the inner wall of the intermediate body (32).

2. The double-conical hydraulic slip according to claim 1, characterized in that: The taper of the inner wall of the intermediate body (32) is 1:3; The taper of the outer wall of the intermediate body (32) is 2:

3.

3. The double-conical hydraulic slip according to claim 1, characterized in that: The driving assembly (2) comprises a driving member (21), a first transmission unit (22) and a plurality of second transmission units (23); The driving member (21) is vertically oriented and arranged on the slip seat (1), and the telescopic end of the driving member (21) is connected to the first transmission unit (22) so as to drive the intermediate body (32) to move up and down along the slip seat (1) through the first transmission unit (22); A plurality of the second transmission units (23) are arranged in one-to-one correspondence with the intermediate body (32); When the intermediate body (32) moves upward along the inner side wall of the slip seat (1), the intermediate body (32) drives the slip body unit (31) to move upward along the inner side wall of the intermediate body (32) through the second transmission unit (23); When the intermediate body (32) moves downward along the inner side wall of the slip seat (1), the slip body unit (31) descends by its own weight. After the intermediate body (32) moves down to its proper position, the second transmission unit (23) presses down the slip body unit (31) to squeeze the inner side wall of the intermediate body (32).

4. The double-conical hydraulic slip according to claim 3, characterized in that: The first transmission unit (22) comprises an annular connecting rod (221) and a plurality of connecting rods (222); The plurality of connecting rods (222) and the plurality of intermediate bodies (32) are arranged in one-to-one correspondence; The annular connecting rod (221) is arranged in the slip seat (1) and is coaxially arranged with the slip seat (1), and the telescopic end of the driving member (21) is connected to the annular connecting rod (221) to drive the annular connecting rod (221) to move up and down; One end of the connecting rod (222) is connected to the annular connecting rod (221), and the other end of the connecting rod (222) is connected to the intermediate body (32); When the telescopic end of the driving member (21) drives the annular connecting rod (221) to move up and down, the annular connecting rod (221) drives the intermediate body (32) to move along the inner side wall of the slip seat (1).

5. The double-conical hydraulic slip according to claim 4, characterized in that: Each of the second transmission units (23) comprises a driving column (231), a shift fork (232) and a guide column (233); The shift fork (232) is rotatably connected to one end of the intermediate body (32) adjacent to the intermediate body (32), a guide groove is provided on the shift fork (232), the guide column (233) is arranged on the slip seat (1) and is located in the guide groove, the drive column (231) is arranged on one side of the slip body unit (31), and one end of the shift fork (232) forms an abutment end; When the intermediate body (32) moves upward along the inner side wall of the slip seat (1), the guide column (233) slides along the guide groove of the shift fork (232) toward the side close to the slip body unit (31), the shift fork (232) rotates clockwise, and the abutting end of the shift fork (232) pushes up the drive column (231) to make the slip body unit (31) move upward along the intermediate body (32); When the intermediate body (32) moves downward along the inner side wall of the slip seat (1), the guide column (233) slides along the guide groove of the shift fork (232) toward the side away from the slip body unit (31), and the shift fork (232) rotates counterclockwise, while the slip body unit (31) descends by its own weight. After the intermediate body (32) moves down to its proper position, the abutting end of the shift fork (232) presses down the driving column (231) so that the slip body unit (31) moves downward along the intermediate body (32) and presses the inner side wall of the intermediate body (32).

6. The double-conical hydraulic slip according to claim 5, characterized in that: The abutting end of the shift fork (232) comprises a first abutting block and a second abutting block which are arranged at intervals; The first abutment block is used to push up the driving column (231); The second abutment block is used to press down the driving column (231).

7. The double-conical hydraulic slip according to claim 1, characterized in that: The driving assembly (2) comprises a first sliding column (24); A first sliding groove is provided on the outer side wall of the intermediate body (32) along an inclined direction; The first sliding column (24) passes through the slip seat (1) and enters the first sliding groove. The first sliding column (24) is slidably connected to the first sliding groove to limit the sliding of the intermediate body (32).

8. The double-conical hydraulic slip according to claim 7, characterized in that: The driving assembly (2) comprises a second sliding column (25); A second sliding groove is provided on the inner side wall of the intermediate body (32) along an inclined direction; The second sliding column (25) enters the second sliding groove after passing through the slip body unit (31), and the second sliding column (25) is slidably connected to the second sliding groove to limit the sliding of the slip body unit (31).

9. The double-conical hydraulic slip according to claim 1, characterized in that: Also included are multiple groups of buffer components (4); A plurality of groups of the buffer components (4) are arranged in one-to-one correspondence with the intermediate body (32); The buffer assembly (4) comprises a guide rod (41) and a spring (42); The guide rod (41) is connected to the outer edge of the top end of the slip body unit (31), and the bottom end of the guide rod (41) is spaced apart from the top end of the intermediate body (32); The spring (42) is sleeved on the guide rod (41), and the bottom end of the spring (42) abuts against the top end of the intermediate body (32), and the top end of the spring (42) is spaced apart from the outer edge of the top end of the slip body unit (31).

10. The double-conical hydraulic slip according to claim 1, characterized in that: The slip body unit (31) comprises a slip body (311) and a jaw seat (312) which are detachably connected.

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