Drilling pump cylinder sleeve taking-out tool

Abstract

The utility model discloses a drilling pump cylinder sleeve taking-out tool which comprises a containing device, the containing device comprises a lantern ring set and a containing ring set, and the lantern ring set and the containing ring set are connected through a self-length-changing rod. The length self-changing rod comprises a sleeve rod and a sliding rod, one end of the sliding rod is inserted into the sleeve rod, and the outer wall of the sliding rod is in sliding fit with the inner wall of the sleeve rod; the end, away from the sliding rod, of the sleeve rod is connected with the sleeve ring set, the end, away from the sleeve rod, of the sliding rod is connected with the storage ring set, or the end, away from the sliding rod, of the sleeve rod is connected with the storage ring set, and the end, away from the sleeve rod, of the sliding rod is connected with the sleeve ring set. The cylinder sleeve can be conveniently taken, the cylinder sleeve clamping device can adapt to various cylinder sleeve lengths, and the situation that the cylinder sleeve is unstable to fix, falls off and is broken is reduced.

Description

Technical Field

[0001] This utility model relates to the field of drilling pump technology, specifically a drilling pump cylinder liner removal tool. Background Technology

[0002] Drilling pumps are an important component of oil drilling equipment. Also known as mud pumps, drilling pumps are tools used to transport drilling fluid from the surface through drilling pipelines to the bottom of the well and spray it onto the bottom of the well through drill pipes and drill bits. They are equipment designed for high-pressure operations and are used to transport high-viscosity fluids in oil drilling.

[0003] Regarding the above-mentioned and existing related technologies, the inventor believes that the following defects often exist: When using drilling pumps, it is necessary to replace the cylinder liners inside the drilling pump. Traditional replacement operations require the use of pry bars, and most of the time, iron chains are used to fix the cylinder liners for hoisting during the removal process. However, since most iron chains are not specifically designed for cylinder liners and their length is not suitable, the cylinder liners are prone to unstable fixation and falling off during actual operation. Therefore, a drilling pump cylinder liner removal tool is proposed to address the above problems.

[0004] Announcement No. CN222405502U discloses a drilling pump cylinder liner removal tool, comprising: a clamping part for clamping onto the cylinder liner; a positioning ring for tightly fitting onto the end of the cylinder liner; a chain part, one end of which is connected to the clamping part and the other end of which is connected to the positioning ring; and a traction part disposed on the positioning ring and used to connect with the shaft pin of the mud pump center tie rod.

[0005] The chain length of the existing technology is fixed, and it can only be used for lifting one type of cylinder liner.

[0006] Announcement No. CN204603739U discloses a drilling pump cylinder liner piston disassembly and assembly device, mainly composed of a fixed seat, a limiting baffle, a supporting rib, a flipping fixed seat, a flipping frame, a lead screw, a lead screw nut, and a rotating handwheel. The fixed seat, limiting baffle, and supporting rib form a locking and clamping part, which can be used to fix and place components such as the drilling pump cylinder liner. The limiting baffle has a semi-circular notch with a radius 10mm to 20mm smaller than the outer diameter of the drilling pump cylinder liner. The supporting rib has a semi-circular notch with a radius 2mm to 3mm larger than the cylinder liner radius. The lead screw and other components can be flipped together with the flipping frame. A rotating handwheel is installed on the outside of the lead screw; rotating the rotating handwheel can push or push the piston and connecting rod into or out of the cylinder liner.

[0007] The existing technology cannot be used to lift cylinder liners.

[0008] Announcement No. CN110589131B discloses a cover plate for packaging bimetallic cylinder liners and a handling method, including a cylinder body and a clamping device. The two ends of the cylinder body abut against the cover plate, and the lower end of the cover plate is fixed with a positioning plate by two steel nails. The positioning plate abuts against the side wall inside the cylinder body. The two cover plates and the cylinder body are connected by a packing strap. Through the cooperation between the cover plate and the packing strap, the packing strap fixes the cover plate and the cylinder body. Since the cover plate is octagonal and larger than the outer circle of the cylinder body, a gap will be generated when multiple cylinder bodies are placed together, thereby facilitating loading and unloading.

[0009] This existing technology is used for transporting multiple cylinder liners, but it cannot adapt to the lifting of different individual cylinder blocks.

[0010] In summary, the technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are all different from those of this utility model. For more technical features, technical problems to be solved, and beneficial effects of this utility model, the above-disclosed technical documents do not provide any technical inspiration. Utility Model Content

[0011] In view of the above-mentioned defects in the existing technology, the purpose of this utility model is to provide a drilling pump cylinder liner removal tool.

[0012] To achieve the above objectives, the present invention adopts the following technical solution:

[0013] A drilling pump cylinder liner removal tool includes a receiving device, which includes a collar assembly and a receiving ring assembly. The collar assembly and the receiving ring assembly are connected by a self-variable length rod, and a lifting connector is provided on the collar assembly.

[0014] Furthermore, the variable length rod includes a sleeve rod and a sliding rod, one end of the sliding rod is inserted into the sleeve rod, and the outer wall of the sliding rod slides in conjunction with the inner wall of the sleeve rod;

[0015] Specifically, the end of the sleeve rod away from the slide rod is connected to the collar assembly, and the end of the slide rod away from the sleeve rod is connected to the receiving ring assembly, or the end of the sleeve rod away from the slide rod is connected to the receiving ring assembly, and the end of the slide rod away from the sleeve rod is connected to the collar assembly.

[0016] Furthermore, the collar assembly includes a main sleeve and a secondary sleeve, the ends of which are connected by a first connector, and the main sleeve is connected to a lifting connector;

[0017] Specifically, the storage ring assembly includes a main storage sleeve and a secondary storage sleeve, the ends of which are connected by a second connector, and the inner walls of both the main and secondary storage sleeves are provided with steps for positioning the cylinder liner;

[0018] Specifically, the main sleeve is connected to the main storage sleeve via a variable length rod, and the secondary sleeve is connected to the secondary storage sleeve via a variable length rod.

[0019] Furthermore, the first connecting member includes a first main connecting seat and a first auxiliary connecting seat. The first main connecting seat is integrally provided at both ends of the main sleeve, and the first auxiliary connecting seat is integrally provided at both ends of the auxiliary sleeve. The first main connecting seat and the first auxiliary connecting seat are provided with first mounting holes. The corresponding first main connecting seat and the first auxiliary connecting seat are connected by a first connecting bolt and a first connecting nut. The main sleeve and the auxiliary sleeve are clamped and fixed by tightening the first connecting bolt and the first connecting nut.

[0020] Specifically, the second connector includes a second main connector and a second auxiliary connector. The second main connector is integrally provided at both ends of the main housing sleeve, and the second auxiliary connector is integrally provided at both ends of the auxiliary housing sleeve. The second main connector and the second auxiliary connector are both provided with second mounting holes. The corresponding second main connector and the second auxiliary connector are connected by a second connecting bolt and a second connecting nut. By tightening the second connecting bolt and the second connecting nut, the main housing sleeve and the auxiliary housing sleeve are clamped and fixed to the cylinder liner.

[0021] Furthermore, it also includes an active variable length mechanism, which is disposed between the collar group and the receiving ring group, and the active variable length mechanism includes a driven rod and an active collar rod;

[0022] Specifically, the active sleeve is provided with a slide rail, one end of the driven rod is slidably inserted into the slide rail, the end of the active sleeve away from the driven rod is connected to the receiving ring assembly, and the end of the driven rod away from the active sleeve is connected to the collar assembly;

[0023] Specifically, the active sleeve has a groove at one end away from the center of the storage ring assembly, the groove being connected to a slide rail. The active sleeve has a first bearing at the end of the groove away from the storage ring assembly, and the outer peripheral wall of the storage ring assembly has a second bearing near the groove. The first and second bearings are rotatably connected to a threaded rod, which is threadedly connected to a moving block. The moving block passes through the groove and is connected to the end of the driven rod. The threaded rod passes through the first bearing, and a drive head is provided at the end of the threaded rod outside the first bearing.

[0024] Furthermore, the drive head is an I-beam connector, and two active variable length mechanisms are symmetrically arranged, with belts covering the two I-beam connectors.

[0025] Furthermore, it also includes a protective device, which includes two fixing collars. The outer peripheral wall of the fixing collar is provided with a placement groove for connecting a pry bar. The end face of the fixing collar is provided with a storage groove. The end of the fixing collar is connected to a fixing block. The fixing block is provided with a storage hole. The storage groove cooperates with the collar assembly for positioning. The first connecting bolt passes through the storage hole and the first mounting hole to fix the fixing collar to the collar assembly.

[0026] Furthermore, the sleeve rod and the sliding rod are both cylindrical; the main sleeve, the secondary sleeve, the main storage sleeve, and the secondary storage sleeve are all semi-circular rings.

[0027] Furthermore, the groove and slideway both extend to the receiving ring assembly, the driven rod and the driving sleeve are arc plate-shaped, the thread of the threaded rod is a trapezoidal thread, the I-beam connector is provided with trapezoidal grooves in a circumferential array, and the belt is a trapezoidal toothed belt.

[0028] Furthermore, the mating surfaces of the connecting seats in the first connector and the second connector are coplanar, and the two active variable length mechanisms are symmetrical about the mating surface of the connecting seats in the second connector.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] 1. This utility model allows for easy handling of cylinder liners, can adapt to various cylinder liner lengths, and reduces the possibility of cylinder liners falling off and breaking due to unstable fixing.

[0031] 2. This utility model can reduce the wear between the pry bar and the cylinder liner. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a drilling pump cylinder liner removal tool according to the present invention.

[0033] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.

[0034] Figure 3 This is a schematic diagram of the storage device in this utility model.

[0035] Figure 4 This is a schematic diagram of the protective device in this utility model.

[0036] Figure 5 yes Figure 4 Enlarged diagram of point B in the middle.

[0037] In the diagram: 1. Cylinder liner;

[0038] 2. Storage device; 21. Main sleeve; 22. Secondary sleeve; 23. Main storage sleeve; 24. Secondary storage sleeve; 25. Sleeve rod; 26. Slide rod; 27. Moving block; 28. Threaded rod; 29. ​​Belt; 210. Driven rod; 211. Driving sleeve rod; 212. Hanging rod;

[0039] 3. Protective device; 31. Fixing collar; 32. Fixing block; 33. Storage slot; 34. Storage hole; 35. Placement slot. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Example 1:

[0042] Please see Figures 1 to 3 This utility model provides a drilling pump cylinder liner removal tool, including a storage device 2. The storage device 2 includes a collar assembly and a storage ring assembly. The collar assembly is used to fit on the surface of the cylinder liner 1, and the storage ring assembly is used to position the cylinder liner 1. The collar assembly and the storage ring assembly are connected by a self-variable length rod. The length between the collar assembly and the storage ring assembly is adjusted by the self-variable length rod to adapt to the transfer of cylinder liners 1 of different lengths.

[0043] Furthermore, the variable length rod includes a sleeve rod 25 and a sliding rod 26. One end of the sliding rod 26 is inserted into the sleeve rod 25, and the outer wall of the sliding rod 26 slides against the inner wall of the sleeve rod 25. The end of the sleeve rod 25 away from the sliding rod 26 is welded or threaded to a collar assembly, and the end of the sliding rod 26 away from the sleeve rod 25 is welded or threaded to a receiving ring assembly. Alternatively, the end of the sleeve rod 25 away from the sliding rod 26 is welded or threaded to a receiving ring assembly, and the end of the sliding rod 26 away from the sleeve rod 25 is welded or threaded to a collar assembly. During operation, the main receiving sleeve 23 and the auxiliary receiving sleeve 24 will drive the sleeve rod 25 or the sliding rod 26 to move, thereby adapting to the length of the cylinder liner 1. During storage, the sleeve rod 25 can store the sliding rod 26, reducing space occupation.

[0044] Specifically, both the sleeve 25 and the slide rod 26 are cylindrical.

[0045] Furthermore, the collar assembly includes a main collar 21 and a secondary collar 22, the ends of which are connected by a first connector; the storage collar assembly includes a main storage collar 23 and a secondary storage collar 24, the ends of which are connected by a second connector; the inner walls of both the main storage collar 23 and the secondary storage collar 24 are provided with steps for positioning the cylinder liner 1; the main collar 21 is connected to the main storage collar 23 via a variable length rod, and the secondary collar 22 is connected to the secondary storage collar 24 via a variable length rod.

[0046] Specifically, the main sleeve 21 is rotatably connected to the lifting rod 212, and the lifting rod is provided with a lifting hole.

[0047] Specifically, the first connecting member includes a first main connecting seat and a first auxiliary connecting seat. The first main connecting seat is integrally provided at both ends of the main sleeve 21, and the first auxiliary connecting seat is integrally provided at both ends of the auxiliary sleeve 22. The first main connecting seat and the first auxiliary connecting seat are provided with first mounting holes. The corresponding first main connecting seat and the first auxiliary connecting seat are connected by a first connecting bolt and a first connecting nut. By tightening the first connecting bolt and the first connecting nut, the main sleeve 21 and the auxiliary sleeve 22 are clamped and fixed to the cylinder liner 1.

[0048] Specifically, the second connector includes a second main connector and a second auxiliary connector. The second main connector is integrally provided at both ends of the main storage sleeve 23, and the second auxiliary connector is integrally provided at both ends of the auxiliary storage sleeve 24. The second main connector and the second auxiliary connector are provided with second mounting holes. The corresponding second main connector and the second auxiliary connector are connected by a second connecting bolt and a second connecting nut. By tightening the second connecting bolt and the second connecting nut, the main storage sleeve 23 and the auxiliary storage sleeve 24 are clamped and fixed to the cylinder liner 1.

[0049] Preferably, the main sleeve 21, the secondary sleeve 22, the main storage sleeve 23, and the secondary storage sleeve 24 are all semi-circular rings.

[0050] In another preferred embodiment, the main sleeve 21, the auxiliary sleeve 22, the main storage sleeve 23, and the auxiliary storage sleeve 24 are all semi-circular rings, which can accommodate the clamping of more cylinder liners 1.

[0051] During operation, the main sleeve 21 and the auxiliary sleeve 22 are fixed together, and then the main storage sleeve 23 and the auxiliary storage sleeve 24 are fixed together. Then, the main sleeve 21, the auxiliary sleeve 22, the main storage sleeve 23 and the auxiliary storage sleeve 24 are put on the surface of the cylinder liner 1. When the cylinder liner 1 moves, it will press against the steps of the main storage sleeve 23 and the auxiliary storage sleeve 24. The main storage sleeve 23 and the auxiliary storage sleeve 24 are moved by a self-variable length rod. By setting the main sleeve 21, the auxiliary sleeve 22, the main storage sleeve 23 and the auxiliary storage sleeve 24, the cylinder liner 1 can be stored, reducing the possibility of the cylinder liner 1 moving randomly and falling off. At the same time, it is also convenient to lift the cylinder liner 1.

[0052] Example 2:

[0053] Based on Example 1, this example provides a scheme for actively variable length.

[0054] It also includes an active variable length mechanism, which is disposed between the collar assembly and the receiving ring assembly. The active variable length mechanism includes a driven rod 210 and an active sleeve rod 211. One end of the active sleeve rod 211 is provided with a slide rail, and one end of the driven rod 210 is slidably inserted into the slide rail. The end of the active sleeve rod 211 away from the driven rod 210 is welded to the receiving ring assembly, and the end of the driven rod 210 away from the active sleeve rod 211 is welded to the collar assembly. The active sleeve rod 211 has a groove at the end away from the center of the receiving ring assembly. The slide groove and the slide track are connected. The active sleeve rod 211 is welded with a first bearing at the end of the slide groove away from the receiving ring assembly. The outer peripheral wall of the receiving ring assembly is welded with a second bearing near the slide groove. The first bearing and the second bearing are rotatably connected to a threaded rod 28 through a bushing or bearing. The threaded rod 28 is threadedly connected to a moving block 27. The moving block 27 passes through the slide groove and is connected to the end of the driven rod 210 by a screw. The threaded rod 28 passes through the first bearing and has a drive head at its end outside the first bearing. During operation, the threaded rod 28 rotates on the inner wall of the moving block 27, driving the moving block 27 to move, thereby adjusting the position of the driven rod 210. The threaded rod 28 allows for convenient adjustment of the position of the moving block 27 and also restricts its position.

[0055] Specifically, the chute and slide rail both extend to the receiving ring assembly, maximizing the range of length variation.

[0056] Preferably, the driven rod 210 and the driving sleeve 211 are arc-shaped plates, which have a large installation area and will not cause interference problems.

[0057] Preferably, the thread of the threaded rod 28 is a trapezoidal thread, which has a self-locking characteristic to prevent changes in length.

[0058] Furthermore, the drive head is an I-beam connector, and two active variable length mechanisms are symmetrically arranged. The two I-beam connectors are covered with belts 29. By pulling the belts 29, the two I-beam connectors are driven together, so that the two active variable length mechanisms move at the same time. The belts 29 facilitate the operation of the two threaded rods 28.

[0059] Preferably, the I-shaped connector is provided with trapezoidal grooves in a circumferential array, and the belt 29 is a trapezoidal toothed belt, so that the synchronous movement will not slip.

[0060] Specifically, the mating surfaces of the connecting seats in the first connector and the second connector are coplanar, and the two active variable length mechanisms are symmetrical about the mating surface of the connecting seats in the second connector. Four self-variable length rods are set between one active variable length mechanism and one first connector or second connector.

[0061] Example 3:

[0062] Please see Figures 4 to 5 Based on Embodiment 2, this embodiment further includes a protective device 3. The protective device 3 includes two fixing collars 31. The outer peripheral wall of the fixing collar 31 is provided with a placement groove 35 for connecting a pry bar. The end face of the fixing collar 31 is provided with a receiving groove 33. A fixing block 32 is welded to the end of the fixing collar 31. The fixing block 32 is provided with a receiving hole 34. The receiving groove 33 cooperates with the collar assembly for positioning. The first connecting bolt passes through the receiving hole 34 and the first mounting hole to fix the fixing collar 31 to the collar assembly. During operation, the fixing collar 31 is fitted on the surface of the cylinder liner 1. When the fixing collar 31 moves, it will drive the fixing block 32 to move. The fixing block 32 fits against the connecting part of the collar assembly. The receiving groove 33 cooperates with the collar assembly. The collar 31 is fixed by the first bolt. The first bolt and the first nut are tightened to make the collar assembly clamp the cylinder liner 1. The cylinder liner 1 is pried out by inserting a pry bar into the placement groove 35. By setting the fixing collar 31, the wear of the cylinder liner 1 by the pry bar can be reduced.

[0063] The complete usage process is as follows:

[0064] In the initial assembly, the main sleeve 21 and the auxiliary sleeve 22 are fixed together with bolts. Then, the main storage sleeve 23 and the auxiliary storage sleeve 24 are fixed together. The sleeve rod 25 and the sliding rod 26 are fitted together, the driven rod 210 and the driving sleeve rod 211 are fitted together, the moving block 27 is installed, the threaded rod 28 is inserted into the first shaft seat, the moving block 27 and the second shaft seat, and then the belt 29 is fitted onto the surface of the two threaded rods 28.

[0065] When it is necessary to remove cylinder liner 1, pull belt 29 to drive threaded rod 28 to rotate, causing moving block 27 to move. Adjust the distance between collar assembly and storage ring assembly to the indicated length for transferring cylinder liner 1. When cylinder liner 1 moves, cylinder liner 1 will insert into the inner surface of main sleeve 21, auxiliary sleeve 22, and the steps of main storage sleeve 23 and auxiliary storage sleeve 24. After locking the first nut and the second nut, use hoisting equipment to lift the entire device. By setting the entire device, cylinder liner 1 can be easily picked up, reducing the possibility of cylinder liner 1 falling off and being damaged due to unstable fixing.

[0066] When using a pry bar, the fixing collar 31 is placed on the surface of the cylinder liner 1, the fixing collar 31 is connected to the collar assembly, the first bolt and the first nut are tightened to make the collar assembly clamp the cylinder liner 1, and the cylinder liner 1 is pried out by inserting the pry bar into the placement groove 35.

[0067] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0068] In this utility model, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0069] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0070] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0071] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A drilling pump cylinder liner removal tool, comprising a receiving device, said receiving device comprising a collar assembly and a receiving ring assembly, characterized in that, The collar assembly and the storage ring assembly are connected by a self-variable length rod, and the collar assembly is equipped with a hoisting connector. The variable length rod includes a sleeve rod and a sliding rod, one end of which is inserted into the sleeve rod, and the outer wall of the sliding rod slides in conjunction with the inner wall of the sleeve rod; The end of the sleeve rod away from the slide rod is connected to the collar assembly, and the end of the slide rod away from the sleeve rod is connected to the storage ring assembly; or the end of the sleeve rod away from the slide rod is connected to the storage ring assembly, and the end of the slide rod away from the sleeve rod is connected to the collar assembly. The collar assembly includes a main sleeve and a secondary sleeve, the ends of which are connected by a first connector, and the main sleeve is connected to a lifting connector. The storage ring assembly includes a main storage sleeve and a secondary storage sleeve. The ends of the main storage sleeve and the secondary storage sleeve are connected by a second connector. The inner walls of both the main storage sleeve and the secondary storage sleeve are provided with steps for positioning the cylinder liner. The main sleeve is connected to the main storage sleeve via a variable length rod, and the secondary sleeve is connected to the secondary storage sleeve via a variable length rod. The first connecting member includes a first main connecting seat and a first auxiliary connecting seat. The first main connecting seat is integrally provided at both ends of the main sleeve, and the first auxiliary connecting seat is integrally provided at both ends of the auxiliary sleeve. The first main connecting seat and the first auxiliary connecting seat are provided with first mounting holes. The corresponding first main connecting seat and the first auxiliary connecting seat are connected by a first connecting bolt and a first connecting nut. The main sleeve and the auxiliary sleeve are clamped and fixed by tightening the first connecting bolt and the first connecting nut. The second connector includes a second main connector and a second auxiliary connector. The second main connector is integrally provided at both ends of the main housing sleeve, and the second auxiliary connector is integrally provided at both ends of the auxiliary housing sleeve. The second main connector and the second auxiliary connector are provided with second mounting holes. The corresponding second main connector and the second auxiliary connector are connected by a second connecting bolt and a second connecting nut. By tightening the second connecting bolt and the second connecting nut, the main housing sleeve and the auxiliary housing sleeve are clamped and fixed to the cylinder liner.

2. The drilling pump cylinder liner removal tool according to claim 1, characterized in that, It also includes an active variable length mechanism, which is disposed between the collar group and the receiving ring group, and the active variable length mechanism includes a driven rod and an active collar rod; The active sleeve is provided with a slide rail, one end of the driven rod is slidably inserted into the slide rail, the end of the active sleeve away from the driven rod is connected to the storage ring assembly, and the end of the driven rod away from the active sleeve is connected to the collar assembly; The active sleeve has a groove at one end away from the center of the storage ring assembly, and the groove is connected to the slide rail. The active sleeve has a first bearing at the end of the groove away from the storage ring assembly. The outer peripheral wall of the storage ring assembly has a second bearing near the groove. The first bearing and the second bearing are rotatably connected to a threaded rod. The threaded rod is threadedly connected to a moving block. The moving block passes through the groove and is connected to the end of the driven rod. The threaded rod passes through the first bearing and has a drive head at the end of the threaded rod outside the first bearing.

3. A drilling pump cylinder liner removal tool according to claim 2, characterized in that, The drive head is an I-beam connector, and two active variable length mechanisms are symmetrically arranged, with belts covering the two I-beam connectors.

4. A drilling pump cylinder liner removal tool according to claim 2, characterized in that, It also includes a protective device, which includes two fixing collars. The outer peripheral wall of the fixing collar is provided with a placement groove for connecting a pry bar. The end face of the fixing collar is provided with a storage groove. The end of the fixing collar is connected to a fixing block. The fixing block is provided with a storage hole. The storage groove cooperates with the collar assembly for positioning. The first connecting bolt passes through the storage hole and the first mounting hole to fix the fixing collar to the collar assembly.

5. A drilling pump cylinder liner removal tool according to claim 1, characterized in that, The sleeve rod and slide rod are both cylindrical; the main sleeve, secondary sleeve, main storage sleeve, and secondary storage sleeve are all semi-circular rings.

6. A drilling pump cylinder liner removal tool according to claim 3, characterized in that, The chute and slide rail both extend to the receiving ring assembly; the driven rod and driving sleeve are arc plate-shaped; the thread of the threaded rod is a trapezoidal thread; the I-beam connector is provided with trapezoidal grooves in a circumferential array; and the belt is a trapezoidal toothed belt.

7. A drilling pump cylinder liner removal tool according to claim 3, characterized in that, The mating surfaces of the connecting seats in the first connector and the second connector are coplanar, and the two active variable length mechanisms are symmetrical about the mating surface of the connecting seats in the second connector.

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