A packer anti-stuck fishing tool

Abstract

The present application relates to the technical field of drilling fishing tools, and discloses a packer anti-sticking fishing tool, which comprises a shoe part, a long rod part and a spear part, the two ends of the long rod part are connected with the shoe part and the spear part respectively, the outer diameters of the long rod part and the spear part are all smaller than that of the shoe part, the shoe part comprises a shoe body, a plurality of rhombic drainage blocks are arranged on the shoe body and are uniformly distributed along the axial direction of the shoe body, the spear part comprises a spear rod, the spear rod is hollow, the threaded end of the spear rod is threadedly connected in the long rod part, a cutting assembly is arranged in the long rod part, and the cutting assembly is used for cutting the connecting position of the spear rod and the long rod part. The present application can drain the large foreign matters generated during milling, prevent the large-size part from being stuck, add a weak point protection, facilitate the release of the weak point when stuck, and safely take out the upper tool from the wellbore, thereby solving the problem of the fishing tool being stuck.

Description

A packer anti-jamming retrieval tool Technical Field

[0001] This invention relates to the field of drilling and fishing tools, specifically to a packer anti-sticking fishing tool. Background Technology

[0002] In the process of handling well completion and workover accidents in oil, gas, and water wells, packer jamming is a frequent occurrence. Currently, there is an integrated tool for packer milling and retrieval that reduces the operation cycle from two drilling runs to one, improving construction efficiency and saving costs. However, the generation of packer body and slip fragments during milling can easily lead to drill jamming during milling and retrieval operations, making it impossible to remove the tool. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a packer anti-jamming retrieval tool that guides large foreign objects generated during milling to prevent large parts from getting stuck. Secondly, it adds weak point protection so that when jamming occurs, the tool can be released from the weak point and the upper tool can be safely pulled out of the wellbore, thereby solving the problem of retrieval tools getting stuck.

[0004] The objective of this invention is achieved through the following technical solution: a packer anti-jamming retrieval tool, comprising a grinding shoe part, a long rod part, and a retrieval spear part, wherein the two ends of the long rod part are respectively connected to the grinding shoe part and the retrieval spear part, wherein the outer diameter of the long rod part and the retrieval spear part are both smaller than the outer diameter of the grinding shoe part, the grinding shoe part includes a grinding shoe body, and alloy teeth are welded to one end of the grinding shoe body near the long rod part, and a plurality of rhomboid guide blocks are provided on the grinding shoe body, the plurality of rhomboid guide blocks being evenly distributed along the axial direction of the grinding shoe body;

[0005] The spear-catching part includes a spear shaft, which is hollow and has threads on its outer wall. The long shaft part includes a fixed shaft body and a disassembly shaft body. One end of the fixed shaft body is connected to the grinding shoe body, and the other end is detachably connected to the disassembly shaft body. The threaded end of the spear shaft is threaded into the disassembly shaft body. A cutting component is provided in the fixed shaft body.

[0006] The cutting assembly includes a rotating cylinder and a cutting seat. The rotating cylinder is rotatably mounted on the inner wall of the fixed rod. The rotating cylinder has a plurality of cutting seats evenly distributed along its circumference. The cutting seats move radially along the rotating cylinder. The connection position between the spear and the disassembly rod is opposite to the cutting seat. The cutting seat is provided with a plurality of cutting blades, which are evenly distributed along the axial direction of the rotating cylinder.

[0007] The effect of adopting the above technical solution is that, through the diamond-shaped guide block of the grinding shoe body, large foreign objects generated during grinding are guided along the diamond-shaped guide block to the chip removal groove of the grinding shoe part during the pump stop retrieval and falling, thereby settling to the bottom of the grinding shoe part, avoiding settling to other large-sized parts of the grinding shoe body and causing the tool to get stuck, thus reducing the risk of tool getting stuck. Secondly, if the fishing string gets stuck unexpectedly in the well, the problem can also be solved by the weak point structure. By moving the cutting seat, the cutting blade contacts the connection position between the disassembly rod and the spear rod. The rotating cylinder drives the cutting blade to rotate, thereby cutting off the connection position. The spear part below the weak point is released, and the long rod part and the grinding shoe part are safely pulled out of the wellbore. The spear rod part enters the tool water hole, which does not affect the secondary retrieval.

[0008] In some embodiments, a chuck body is rotatably disposed inside the rotating cylinder. The end face of the chuck body away from the grinding shoe body is provided with a planar thread. An L-shaped connecting seat is fixed at one end of the cutting seat near the chuck body. A sliding block is fixed at the lateral end of the L-shaped connecting seat. The end face of the sliding block near the chuck body is provided with end face teeth. The end face teeth of the sliding block mesh with the planar thread of the chuck body.

[0009] In some embodiments, a main shaft is keyed to the center of the chuck body, and a first friction wheel is mounted on the main shaft. The first friction wheel moves along the axial direction of the main shaft. A motor is disposed inside the fixed rod body, and a partition is disposed between the motor and the main shaft. The partition is fixed to the inner wall of the fixed rod body, and a drive shaft is rotatably connected to the partition. One end of the drive shaft is connected to the output shaft of the motor, and a second friction wheel is mounted on the other end. The second friction wheel contacts the first friction wheel to form a friction pair.

[0010] In some embodiments, a spline groove is provided on the spindle, the first friction wheel is installed in the spline groove of the spindle via a spline, and an abutment ring is fixedly sleeved on the spindle, the abutment ring being connected to the first friction wheel via a return spring.

[0011] In some embodiments, a rotating shaft is rotatably connected to the partition, the rotating shaft is parallel to the main shaft, a first gear is mounted on the rotating shaft, a second gear is mounted on the drive shaft, the second gear meshes with the first gear, a third gear is fixed to the end face of the rotating cylinder near the partition, and a fourth gear is fitted on the rotating shaft, the fourth gear meshes with the third gear.

[0012] In some embodiments, a hollow connecting column is fixed to one end of the disassembly rod away from the spear shaft. The hollow connecting column is coaxially arranged with the disassembly rod. A plurality of pins are arranged on the side wall of the fixing rod along its own circumference. The fixing rod is connected to the hollow connecting column by the pins.

[0013] In some embodiments, a limit strip is fixed to the inner wall of the fixed rod, and a limit groove is formed on the outer wall of the hollow connecting column, with the limit strip slidably disposed in the limit groove.

[0014] In some embodiments, a connector is fixed to one end of the grinding shoe body away from the alloy teeth, and a plurality of chip removal grooves are formed on the side wall of the grinding shoe body along its own circumference. A rhomboid guide block is provided between two adjacent chip removal grooves, and the chip removal inclined surfaces on both sides of the rhomboid guide block face the two chip removal grooves respectively.

[0015] In some embodiments, the spear-catching portion further includes a spear guard and a guide cone, one end of which is coaxially connected to the spear shaft, and the spear guard is mounted on the guide cone.

[0016] The beneficial effects of this invention are:

[0017] 1. Through the diamond-shaped guide blocks on the grinding shoe body, large foreign objects generated during grinding are guided along the diamond-shaped guide blocks to the chip discharge groove of the grinding shoe part during the pump stop retrieval and falling, thereby settling to the bottom of the grinding shoe part, avoiding settling to other large-sized parts of the grinding shoe body and causing the tool to get stuck, thus reducing the risk of tool getting stuck.

[0018] 2. A weak point structure was added to the retrieval tool, namely the connection point between the disassembly rod and the spear rod. If the fishing string gets stuck in the well, the weak point structure can solve the problem. By moving the cutting seat, the cutting blade contacts the connection point between the disassembly rod and the spear rod. The rotating cylinder drives the cutting blade to rotate, thereby cutting off the connection point. The spear part below the weak point can be released, and the long rod part and the grinding shoe part can be safely pulled out of the well. The spear rod part enters the tool's water hole, which does not affect the secondary retrieval. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the overall structure of a packer anti-jamming retrieval tool according to the present invention;

[0020] Figure 2 is a partial internal view of a packer anti-jamming retrieval tool according to the present invention;

[0021] Figure 3 is an enlarged view of point A in Figure 2;

[0022] Figure 4 is an enlarged view of point B in Figure 2;

[0023] Figure 5 is an enlarged view of point C in Figure 2;

[0024] Figure 6 is a schematic diagram of the chuck body in a packer anti-jamming retrieval tool of the present invention;

[0025] In the diagram, 1-grinding shoe part, 2-long rod part, 3-spear retrieval part, 4-grinding shoe body, 5-alloy teeth, 6-diamond-shaped guide block, 7-fixed rod body, 8-disassembly rod body, 9-rotating cylinder, 10-spear rod, 11-cutting seat, 12-cutting blade, 13-chuck body, 14-L-shaped connecting seat, 15-sliding block, 16-end face teeth, 17-main shaft, 18-first friction wheel, 19-motor, 20-reset spring, 21-rotating shaft, 22-first gear, 23-partition plate, 24-drive shaft, 25-second gear, 26-third gear, 27-fourth gear, 28-hollow connecting column, 29-pin, 30-limiting strip, 31-limiting groove, 32-joint, 33-chip removal groove, 34-spear bearing, 35-lead cone, 36-second friction wheel, 37-abutment ring. Detailed Implementation

[0026] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0027] As shown in Figures 1 to 6, a packer anti-jamming retrieval tool includes a grinding shoe part 1, a long rod part 2, and a retrieval spear part 3. The two ends of the long rod part 2 are connected to the grinding shoe part 1 and the retrieval spear part 3, respectively. The outer diameters of both the long rod part 2 and the retrieval spear part 3 are smaller than the outer diameter of the grinding shoe part 1. The grinding shoe part 1 includes a grinding shoe body 4. Alloy teeth 5 are welded to one end of the grinding shoe body 4 near the long rod part 2. Multiple rhomboid guide blocks 6 are provided on the grinding shoe body 4, and these blocks are evenly distributed along the axial direction of the grinding shoe body 4. A connector 32 is fixed to the end of the grinding shoe body 4 away from the alloy teeth 5. Multiple chip removal grooves 33 are formed on the sidewall of the grinding shoe body 4 along its circumference. Adjacent chip removal grooves... A rhomboid guide block 6 is provided between the grooves 33. The chip removal slopes on both sides of the rhomboid guide block 6 face the two chip removal grooves 33 respectively. The connector 32 is connected to the drilling and retrieval string. Through the retrieval tool below the drilling and retrieval string, and through the rhomboid guide block 6 of the grinding shoe body 4, large foreign objects generated during milling are guided along the rhomboid guide block 6 to the chip removal groove 33 of the grinding shoe part 1 during the retrieval and descent after the pump is stopped. This allows them to settle to the bottom of the grinding shoe part 1, preventing them from settling into other large parts of the grinding shoe body 4 and causing the tool to get stuck, thus reducing the risk of tool jamming. The retrieval spear part 3 includes a spear shaft 10, which is hollow and has threads on its outer wall. The long rod part 2 includes a fixed rod body. 7 and disassembly rod 8, one end of the fixed rod 7 is connected to the grinding shoe body 4, and the other end is detachably connected to the disassembly rod 8. The threaded end of the spear 10 is threaded into the disassembly rod 8. A cutting assembly is provided inside the fixed rod 7; the cutting assembly includes a rotating cylinder 9 and a cutting seat 11. The rotating cylinder 9 is rotatably disposed on the inner wall of the fixed rod 7. Multiple cutting seats 11 are evenly distributed along the circumference of the rotating cylinder 9. The cutting seats 11 move radially along the rotating cylinder 9. The connection position between the spear 10 and the disassembly rod 8 is opposite to the cutting seat 11. Several cutting blades 12 are provided on the cutting seat 11. The several cutting blades 12 are evenly distributed along the axial direction of the rotating cylinder 9. A weak point structure is added to the salvage tool. The connection point between the disassembly rod 8 and the spear rod 10 is a weak point. Even if the fishing tool gets stuck or the fishing string gets stuck unexpectedly downhole, the problem can be solved by the weak point structure. The cutting seat 11 moves to make the cutting blade 12 contact the connection point between the disassembly rod 8 and the spear rod 10. At the same time, the rotating cylinder 9 drives the cutting blade 12 to rotate, thereby cutting off the connection point and destroying the threaded connection between the spear rod 10 and the disassembly rod 8. Then, the fishing tool is lifted by the drilling and grinding fishing string, and the spear part 3 below the weak point is released. The long rod part 2 and the grinding shoe part 1 are safely pulled out of the wellbore. The spear part 3 enters the tool water hole, which does not affect the secondary fishing.

[0028] In some embodiments, as shown in Figures 2, 3, 4, and 6, a chuck body 13 is rotatably disposed inside the rotating cylinder 9. The end face of the chuck body 13 away from the grinding shoe body 4 is provided with a planar thread. An L-shaped connecting seat 14 is fixed to one end of the cutting seat 11 near the chuck body 13. A sliding block 15 is fixed to the lateral end of the L-shaped connecting seat 14. The end face tooth 16 of the sliding block 15 near the end face of the chuck body 13 engages with the planar thread of the chuck body 13. The outer wall of the rotating cylinder 9 is open. A limiting groove is provided for the cutting seat 11 to pass through. The movement of the cutting seat 11 is guided by the limiting groove. When the chuck body 13 rotates, due to the meshing of the end face teeth 16 with the planar thread, coupled with the guidance of the limiting groove, the cutting seat 11 moves radially along the rotating cylinder 9, so that the cutting blade 12 contacts the threaded end of the spear rod 10. The rotating cylinder 9 drives the cutting blade 12 to rotate and destroy the connection between the spear rod 10 and the disassembly rod 8, which facilitates the quick discarding of the weak part, thereby solving the problem of the tool getting stuck.A spindle 17 is keyed to the center of the chuck body 13. A first friction wheel 18 is mounted on the spindle 17 and moves axially along the spindle 17. A motor 19 is installed inside the fixed rod body 7. A partition 23 is provided between the motor 19 and the spindle 17 and is fixed to the inner wall of the fixed rod body 7. A drive shaft 24 is rotatably connected to the partition 23. One end of the drive shaft 24 is connected to the output shaft of the motor 19, and the other end is fitted with a second friction wheel 36. The second friction wheel 36 contacts the first friction wheel 18 to form a friction pair. The motor 19 drives the drive shaft 24 to rotate. 4 drives the second friction wheel 36 to rotate. The second friction wheel 36 drives the first friction wheel 18 to rotate through the friction pair formed with the first friction wheel 18, which in turn drives the main shaft 17 to rotate. The main shaft 17 then drives the chuck body 13 to rotate, realizing the movement of the cutting blade 12. Since the cutting blade 12 needs a certain amount of time to cut forward when it contacts the spear rod, and the motor 19 needs to continuously drive the rotating cylinder 9 to rotate without stopping, the rotational connection between the motor 19 and the main shaft 17 will interfere with the movement of the cutting seat 11. To ensure the normal operation of the cutting operation, the first friction wheel 18 is set to... When in motion, specifically, a spline groove is provided on the main shaft 17, and the first friction wheel 18 is installed in the spline groove of the main shaft 17 via a spline. An abutment ring 37 is fixedly sleeved on the main shaft 17, and the abutment ring 37 is connected to the first friction wheel 18 through a return spring 20. The return spring 20 is in a compressed state, and the reaction force of the return spring 20 enhances the friction strength between the first friction wheel 18 and the second friction wheel 36, ensuring the transmission stability of the first friction wheel 18 and the second friction wheel 36. When the cutting blade 12 abuts against the inner wall of the spear shank 10 and cannot continue to advance, the first friction wheel 18 will squeeze... The return spring 20 moves away from the second friction wheel 36, separating the first friction wheel 18 from the second friction wheel 36, thereby cutting off the power from the motor 19 to the main shaft 17. The end face teeth 16 and the planar thread lock the position of the cutting blade 12. When the cut mark allows for further forward movement, the return spring 20 causes the second friction wheel 36 to re-engage with the first friction wheel 18, driving the cutting blade 12 to contact the inner wall of the spear shaft for cutting. This keeps the motor 19 running, driving the rotating cylinder 9 to rotate for cutting. Meanwhile, the motor 19 intermittently moves the cutting seat 11 to adapt to the cutting action.

[0029] Further, as shown in Figure 2, a rotating shaft 21 is rotatably connected to the partition 23. The rotating shaft 21 is parallel to the main shaft 17. A first gear 22 is installed on the rotating shaft 21, and a second gear 25 is installed on the drive shaft 24. The second gear 25 meshes with the first gear 22. A third gear 26 is fixed to the end face of the rotating cylinder 9 near the partition 23. A fourth gear 27 is fitted on the rotating shaft 21. The fourth gear 27 meshes with the third gear 26. The motor 19 drives the drive shaft 24 to rotate. The drive shaft 24 drives the rotating shaft 21 to rotate through the meshing of the first gear 22 and the second gear 25. The rotating shaft 21 drives the rotating cylinder 9 to rotate through the meshing of the fourth gear 27 and the third gear 26. Thus, a single drive component can both drive the rotating cylinder 9 to rotate and achieve radial movement of the cutting seat 11, reducing the arrangement space of the drive component and thus not affecting the strength of the long rod part 2.

[0030] In some embodiments, as shown in Figures 2 and 5, a hollow connecting post 28 is fixed to the end of the disassembly rod 8 away from the spear rod 10. The hollow connecting post 28 is coaxially arranged with the disassembly rod 8. A plurality of pins 29 are arranged on the side wall of the fixing rod 7 along its own circumference. The fixing rod 7 is connected to the hollow connecting post 28 through the pins 29, which facilitates the connection between the disassembly rod 8 and the fixing rod 7. Since cutting weakens the strength of the connection position, it will also damage the structure of the long rod part 2. Therefore, the long rod part 2 is set as the fixing rod 7 and the disassembly rod 8, so that the damaged disassembly rod 8 can be removed and replaced with a new disassembly rod 8 and the spear-retrieving part 3, avoiding the need to replace the entire long rod part 2, reducing costs, and also ensuring the strength of the long rod part 2.

[0031] Furthermore, a limiting strip 30 is fixed to the inner wall of the fixed rod 7, and a limiting groove 31 is opened on the outer wall of the hollow connecting column 28. The limiting strip 30 is slidably disposed in the limiting groove 31. Through the adaptation of the limiting strip 30 and the limiting groove 31, the connection between the disassembly rod 8 and the fixed rod 7 is positioned, which facilitates the quick connection of the pin 29.

[0032] In some embodiments, as shown in FIG1, the spear-catching part 3 further includes a spear blade 34 and a guide cone 35. One end of the guide cone 35 is coaxially connected to the spear shaft 10. The spear blade 34 is mounted on the guide cone 35, and the guide cone 35 plays a guiding role to facilitate the tool's smooth entry into the fish.

[0033] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," and "both ends," 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 invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention. Furthermore, those skilled in the art will understand that the beneficial effects to be achieved by this invention are merely to achieve better beneficial effects compared with the current embodiments in the prior art under specific conditions, rather than to directly achieve the best use effect in the industry.

[0034] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A packer anti-jamming retrieval tool, comprising a grinding shoe part (1), a long rod part (2), and a retrieval spear part (3), wherein the two ends of the long rod part (2) are respectively connected to the grinding shoe part (1) and the retrieval spear part (3), wherein, The outer diameters of the long rod portion (2) and the spear-collecting portion (3) are both smaller than the outer diameter of the grinding shoe portion (1). The grinding shoe portion (1) includes a grinding shoe body (4), with alloy teeth (5) welded to one end of the grinding shoe body (4) near the long rod portion (2). Multiple rhomboid guide blocks (6) are provided on the grinding shoe body (4), and these rhomboid guide blocks (6) are evenly distributed along the axial direction of the grinding shoe body (4). The spear-collecting portion (3) includes a spear shaft (10), which is hollow and has threads on its outer wall. The long rod portion (2) includes a fixing rod body (7) and a disassembly rod body (8). One end of the fixing rod body (7) is connected to the grinding shoe body (4), and the other end is connected to the grinding shoe body (3). The disassembly rod (8) is detachably connected. The threaded end of the spear rod (10) is threadedly connected to the disassembly rod (8). A cutting assembly is provided inside the disassembly rod (8). The cutting assembly includes a rotating cylinder (9) and a cutting seat (11). The rotating cylinder (9) is rotatably disposed on the inner wall of the disassembly rod (8). A plurality of cutting seats (11) are evenly distributed along the circumference of the rotating cylinder (9). The cutting seats (11) move radially along the rotating cylinder (9). The connection position between the spear rod (10) and the disassembly rod (8) is opposite to the cutting seat (11). A plurality of cutting blades (12) are provided on the cutting seat (11). The plurality of cutting blades (12) are evenly distributed along the axial direction of the rotating cylinder (9).

2. The packer anti-jamming retrieval tool according to claim 1, characterized in that, A chuck body (13) is rotatably disposed inside the rotating cylinder (9). The end face of the chuck body (13) away from the grinding shoe body (4) is provided with a planar thread. An L-shaped connecting seat (14) is fixed to one end of the cutting seat (11) near the chuck body (13). A sliding block (15) is fixed to the lateral end of the L-shaped connecting seat (14). The end face of the sliding block (15) near the chuck body (13) is provided with end face teeth (16). The end face teeth (16) of the sliding block (15) mesh with the planar thread of the chuck body (13).

3. A packer anti-jamming retrieval tool according to claim 2, characterized in that, The chuck body (13) is keyed to the middle of a main shaft (17). A first friction wheel (18) is mounted on the main shaft (17). The first friction wheel (18) moves along the axial direction of the main shaft (17). A motor (19) is installed inside the disassembly rod (8). A partition (23) is provided between the motor (19) and the main shaft (17). The partition (23) is fixed to the inner wall of the disassembly rod (8). A drive shaft (24) is rotatably connected to the partition (23). One end of the drive shaft (24) is connected to the output shaft of the motor (19). The other end is fitted with a second friction wheel (36). The second friction wheel (36) contacts the first friction wheel (18) to form a friction pair.

4. A packer anti-jamming retrieval tool according to claim 3, characterized in that, The spindle (17) is provided with a spline groove, and the first friction wheel (18) is installed in the spline groove of the spindle (17) by spline. An abutment ring (37) is fixedly sleeved on the spindle (17), and the abutment ring (37) is connected to the first friction wheel (18) by a return spring (20).

5. A packer anti-jamming retrieval tool according to claim 4, characterized in that, A rotating shaft (21) is rotatably connected to the partition (23). The rotating shaft (21) is parallel to the main shaft (17). A first gear (22) is mounted on the rotating shaft (21). A second gear (25) is mounted on the drive shaft (24). The second gear (25) meshes with the first gear (22). A third gear (26) is fixed on the end face of the rotating cylinder (9) near the partition (23). A fourth gear (27) is fitted on the rotating shaft (21). The fourth gear (27) meshes with the third gear (26).

6. A packer anti-jamming retrieval tool according to claim 1, characterized in that, A hollow connecting column (28) is fixed at one end of the disassembly rod (8) away from the spear rod (10). The hollow connecting column (28) is coaxially arranged with the disassembly rod (8). A plurality of pins (29) are arranged on the side wall of the fixing rod (7) along its own circumference. The fixing rod (7) is connected to the hollow connecting column (28) through the pins (29).

7. A packer anti-jamming retrieval tool according to claim 6, characterized in that, The inner wall of the fixed rod (7) is fixed with a limiting strip (30), and the outer wall of the hollow connecting column (28) is provided with a limiting groove (31). The limiting strip (30) is slidably disposed in the limiting groove (31).

8. A packer anti-jamming retrieval tool according to claim 1, characterized in that, The end of the grinding shoe body (4) away from the alloy tooth (5) is fixed with a connector (32). The side wall of the grinding shoe body (4) is provided with multiple chip removal grooves (33) along its own circumference. A rhomboid guide block (6) is provided between two adjacent chip removal grooves (33). The chip removal inclined surfaces on both sides of the rhomboid guide block (6) are respectively facing the two chip removal grooves (33).

9. A packer anti-jamming retrieval tool according to claim 1, characterized in that, The spear-catching part (3) also includes a spear pad (34) and a guide cone (35). One end of the guide cone (35) is coaxially connected to the spear shaft (10), and the spear pad (34) is mounted on the guide cone (35).

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