A horizontal well two-way sand-carrying well washing tool

Abstract

The present application relates to a kind of horizontal well two-way sand-carrying well washing tool, belong to downhole tool technical field.It is composed of assembly shell, connecting shell, front nozzle and rear joint, one end of assembly shell is equipped with rear joint, the other end is equipped with connecting shell, the end of connecting shell is equipped with front nozzle through mounting ring.The tool can clear the obstructed sand and gravel when the tool is put down through front nozzle, thereby the tool can be put down smoothly;At the same time, the front nozzle is rotated through the cyclone port on the front nozzle, and then the sand bed can be cleaned comprehensively;Through rear nozzle, the sand and gravel adsorbed on the well wall can be removed when the tool is pulled up;Through variable-diameter nozzle, the flow rate of flushing fluid is increased, so that the nozzle is not easy to be blocked;The problems that the existing tool is not easy to be pulled up and put down when washing well, cannot clean the sand bed comprehensively, and is easy to cause new blockage and tool blockage are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to a horizontal well bidirectional sand-carrying well washing tool, belonging to the technical field of downhole tools. BACKGROUND

[0002] With the increasingly mature and development of the development technology of oilfield enterprises in China, the types and application scope of horizontal wells have been greatly improved, and the workload has increased compared with before, but the operation technology matched with the horizontal wells still cannot meet the expected requirements, among which the bottom sand accumulation cannot be effectively flushed, and the conventional sand flushing mode cannot meet the current requirements, which not only hinders the improvement of the productivity of the horizontal wells, but also is easy to cause the bottom plugging. The horizontal well is mainly a well with a 90° inclination angle, and the well bore is drilled along the horizontal direction to a certain length. After the sand production of the oil layer, the sand will flow into the well bore along with the sand flushing fluid, and some large particles will first settle at the lower position of the horizontal section to form a sand bed. When the ordinary hydraulic sand flushing technology is used to clean the sand in the horizontal well, the following problems generally exist: firstly, the sand blocks the lowering and lifting of the sand flushing string; secondly, when the sand flushing string enters the horizontal well section, the sand flushing fluid will form a circulating channel at the upper part with a smaller flow resistance, and it is difficult to completely clean the sand bed at the lower part; and thirdly, after the bottom flushing, the sand at the bottom cannot be completely discharged from the bottom, and some sand will be adsorbed on the well wall again during the migration, which finally causes new plugging, and the adhesion between the flushing tool and the working fluid is easy to cause the plugging of the tool. SUMMARY

[0003] The present application aims at providing a horizontal well bidirectional sand-carrying well washing tool which can be smoothly lowered or lifted, can completely clean the sand bed, and is not easy to cause new plugging and tool plugging.

[0004] The technical scheme of the present application is as follows:

[0005] A horizontal well bidirectional sand-carrying well washing tool is composed of an assembly shell, a connecting shell, a front nozzle and a rear joint, characterized in that: one end of the assembly shell is provided with the rear joint through a guide shell; the other end of the assembly shell is provided with the connecting shell through a rear nozzle shell, and the end of the connecting shell is provided with the front nozzle through a mounting ring; the front nozzle is a cylindrical cavity, and the front nozzle is uniformly provided with front nozzles between which a main nozzle is arranged on the central axis of the front nozzle; the circumferences of the front nozzle on one side of the front nozzle are uniformly provided with swirl ports; the front nozzle, the main nozzle and the swirl port are in communication with the cavity of the front nozzle; and the rear nozzle shell is uniformly provided with rear nozzles.

[0006] The front nozzle and the rear nozzle are respectively arranged in an inclined manner, the front nozzle is arranged in a 45° inclined manner, and the rear nozzle is arranged in a 135° inclined manner; and variable-diameter nozzles are respectively screwed into the ports of the front nozzle and the rear nozzle.

[0007] The swirl port is arranged in a spiral manner.

[0008] The rear center pipe is movably installed in the central hole of the rear joint, and one end of the rear center pipe extends through the central hole of the guide housing into the assembly housing. A front center pipe is threadedly installed at the end of the rear center pipe extending into the assembly housing, and the front center pipe is in sliding seal connection with the assembly housing.

[0009] The front center pipe is a variable diameter body, and a front return spring is sleeved on the front center pipe. The front return spring is in abutting connection with the front center pipe and the assembly housing respectively. The circumference of the front center pipe at the front end of the front return spring is uniformly provided with front center pipe radial flow-through holes.

[0010] A limiting flange is arranged at the end of the rear center pipe in the rear joint. A rear return spring is sleeved on the rear center pipe between the limiting flange and the guide housing. Limiting blocks are radially and symmetrically installed between the rear center pipe extending into the assembly housing and the front center pipe.

[0011] Limiting holes are radially arranged on the limiting blocks, and the limiting holes are in communication with the central hole of the rear center pipe.

[0012] The limiting holes are variable diameter holes, and a limiting head is installed in the limiting hole through a limiting block spring. The limiting head is in sliding seal connection with the limiting hole.

[0013] A clamping groove is arranged on the inner wall of the assembly housing corresponding to the limiting head. A limiting sliding groove is arranged on the inner wall of the assembly housing on one side of the clamping groove corresponding to the limiting head. The end of the limiting sliding groove is arranged in an inclined manner. An assembly housing flow-through hole is arranged on the assembly housing on the other side of the clamping groove. The assembly housing flow-through hole is in communication with the rear nozzle.

[0014] The connecting housing is in the shape of a cup, and a stroke hole is arranged at the center of the connecting housing.

[0015] A flow distribution disc is fixed between the connecting housing and the front nozzle. Symmetrical flow distribution holes are arranged on the flow distribution disc, and the flow distribution holes are in communication with the front nozzle. A sealing head is arranged on the flow distribution disc between the flow distribution holes corresponding to the front center pipe. The sealing head is in intermittent seal connection with the central hole of the front center pipe.

[0016] Magnets are symmetrically fixed on the inner wall of the mounting ring on one side of the front nozzle. Damping blocks A and B are fixed on the front nozzle in front and back manners at both ends of the magnets. The damping blocks A and B are in sliding connection with the mounting ring respectively.

[0017] The guide housing is uniformly provided with guide blocks through positioning blocks. The guide blocks are in limiting sliding connection with the positioning blocks. Steel plate springs are arranged between the guide blocks and the guide housing.

[0018] Rollers are uniformly arranged on the guide blocks.

[0019] The beneficial effects of the present application are as follows:

[0020] The horizontal well bidirectional sand-carrying well-washing tool can clear the blocked sand and gravel when the tool is lowered, so that the tool can be lowered smoothly; meanwhile, the front nozzle is rotated through the cyclone port on the front nozzle, so that the sand bed can be cleaned comprehensively; the sand and gravel adsorbed on the well wall can be removed when the tool is lifted through the rear nozzle; the flushing liquid flow rate is increased through the variable-diameter nozzle, so that the nozzle is not easy to be blocked; the problems that the existing tool is not easy to be lifted and lowered when washing the well, the sand bed cannot be cleaned comprehensively, and new blockage and tool blockage are easily caused are solved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a front view structural schematic diagram of the application;

[0022] Figure 2 It is Figure 1 It is an enlarged schematic diagram of A in the middle;

[0023] Figure 3 It is Figure 1 It is an enlarged schematic diagram of B in the middle;

[0024] Figure 4 It is Figure 1 It is a schematic diagram of C-C in the middle;

[0025] Figure 5 It is a working state schematic diagram when the tool is lifted.

[0026] In the figure: 1, assembly shell, 2, connecting shell, 3, front nozzle, 4, rear joint, 5, guide shell, 6, positioning block, 7, guide block, 8, roller, 9, steel plate spring, 10, rear center pipe, 11, limiting flange, 12, front center pipe, 13, front reset spring, 14, front center pipe radial flow-through hole, 15, limiting block, 16, assembly hole, 17, limiting block spring, 18, limiting head, 19, clamping groove, 20, limiting sliding groove, 21, assembly shell flow-through hole, 22, rear nozzle shell, 23, rear nozzle, 24, stroke hole, 25, mounting ring, 26, front nozzle, 27, main nozzle, 28, cyclone port, 29, variable-diameter nozzle, 30, magnet, 31, flow dividing hole, 32, flow dividing disc, 33, sealing head, 34, gasket, 35, rear reset spring, 36, damping block A, 37, damping block B. DETAILED DESCRIPTION

[0027] The horizontal well two-way sand-carrying well washing tool is composed of an assembly shell 1, a connecting shell 2, a front nozzle 3 and a rear joint 4, and a guide shell 5 is threadedly installed at one end of the assembly shell 1. The guide shell 5 is uniformly provided with guide blocks 7 through positioning blocks 6, and the guide blocks 7 are uniformly provided with rollers 8. The guide blocks 7 are limitingly and slidingly connected with the positioning blocks 6, and a steel plate spring 9 is arranged between the guide blocks 7 and the guide shell 5. During operation, the rollers 8 are extruded by the well wall, the rollers 8 push the guide blocks 7 to compress the steel plate spring 9 to enter the guide shell 5, and after the drill is taken out of the well, the steel plate spring 9 pushes the guide blocks 7 to be immediately reset, so that the rollers 8 are tightly attached to the well wall to move axially, thereby controlling the radial dimension of the guide blocks 7 to change with the size of the well head, and further reducing the shaking and vibration through the cooperation of the guide blocks 7 and the rollers 8.

[0028] The rear joint 4 is screwed on the end of the guide housing 5. The rear center tube 10 is movably installed in the central hole of the rear joint 4, and the end of the rear center tube 10 in the rear joint 4 is provided with a limiting flange 11. The rear center tube 10 is sleeved with a rear reset spring 35 between the limiting flange 11 and the guide housing 5. One end of the rear center tube 10 extends to the assembly housing 1 through the central hole of the guide housing 5, and the end of the rear center tube 10 extending to the assembly housing 1 is screwed with a front center tube 12. The front center tube 12 is in sliding sealing connection with the assembly housing 1. The front center tube 12 is a variable diameter body, and the front center tube 12 is sleeved with a front reset spring 13. The front reset spring 13 is in abutting connection with the front center tube 12 and the assembly housing 1, respectively. The circumference of the front center tube 12 at the front end of the front reset spring 13 is uniformly distributed with front center tube radial flow holes 14. During the flow of the flushing liquid, the flushing liquid impacts the limiting flange 11. Under the action of the limiting flange 11, the flushing liquid pressure can overcome the elastic force of the front reset spring 13 and the rear reset spring 35 to push the front center tube 12 and the rear center tube 10 to move axially. The limiting block 15 is radially and symmetrically installed between the rear center tube 10 and the front center tube 12 extending to the assembly housing 1. The limiting block 15 is radially provided with an assembly hole 16 in communication with the central hole of the rear center tube 10. The assembly hole 16 is a variable diameter hole, and the limiting head 18 is installed in the assembly hole 16 through the limiting block spring 17. The limiting head 18 is in sliding sealing connection with the assembly hole 16. The limiting block spring 17 is provided between the inner wall of the assembly housing 1 and the limiting head 18 to support the limiting block spring 17, thereby preventing the limiting block spring 17 from being damaged by colliding with the inner wall of the assembly housing 1. The assembly housing 1 is provided with a clamping groove 19 corresponding to the limiting head 18 on the inner wall thereof. The inner wall of the assembly housing 1 on one side of the clamping groove 19 is provided with a limiting sliding groove 20 corresponding to the limiting head 18. The end of the limiting sliding groove 20 is obliquely arranged. The assembly housing 1 on the other side of the clamping groove 19 is provided with an assembly housing flow hole 21. The limiting block 15 can be moved by the movement of the rear center tube 10. When the limiting block 15 moves to the clamping groove 19, the flushing liquid enters the assembly hole 16 and presses the limiting head 18. The elastic force of the limiting block spring 17 is overcome, so that the limiting head 18 passes through the gasket 34 and enters the clamping groove 19, thereby limiting the positions of the front center tube 12 and the rear center tube 10 through the cooperation of the limiting head 18 and the limiting block 15. The end of the limiting sliding groove 20 is obliquely arranged to form a supporting force on the limiting head 18 in the axial direction of the limiting block 15 under the action of the limiting sliding groove 20 when the limiting head 18 enters the limiting sliding groove 20 under the action of the flushing liquid. When the limiting head 18 needs to enter the clamping groove 19 to limit the front center tube 12 and the rear center tube 10, the pressure of the flushing liquid must be significantly increased.

[0029] The other end of the assembly shell 1 is threadedly sleeved with a rear spray shell 22. The rear spray shell 22 is uniformly provided with rear spray ports 23, which are arranged in a 135-degree inclined manner and are respectively communicated with the assembly shell flow-through holes 21. The rear spray ports 23 are arranged in a 135-degree inclined manner to flush the liquid sprayed from the rear spray ports 23, and when flushing the well wall cuttings, the cuttings have a certain axial velocity toward the wellhead under the impact of the flushing liquid, which is beneficial to the flushing liquid to move the cuttings toward the wellhead and discharge them to the outside of the well; at the same time, when the flushing liquid impacts the well wall obliquely, the flushing liquid has a certain axial velocity, which is beneficial to the flushing liquid to flush the cuttings adhered to the well wall.

[0030] The rear spray shell 22 is threadedly sleeved with a connecting shell 2, which is sealingly connected with the end face of the assembly shell. The connecting shell 2 is cup-shaped, and the center of the connecting shell 2 is provided with a stroke hole 24, through which the front central pipe 12 can enter the connecting shell during operation.

[0031] The front spray head 3 is sleeved on the end of the connecting shell 2 through a mounting ring 25, and the front spray head 3 is slidingly sealingly connected with the mounting ring 25. The front spray head 3 is a cylindrical cavity, and the front spray head 3 is uniformly provided with front spray ports 26 arranged in a 45-degree inclined manner. The center axis of the front spray head 3 between the front spray ports 26 is provided with a main spray port 27, and the circumference of the front spray head 3 on one side of the front spray port 26 is uniformly provided with swirl ports 28 arranged in a spiral manner. The front spray port 26, the main spray port 27 and the swirl port 28 are respectively communicated with the cavity of the front spray head 3. The ports of the front spray port 26 and the rear spray port 23 are respectively threadedly sleeved with variable-diameter spray heads 29. During operation, the flushing liquid flows into the cavity of the front spray head, and is sprayed out of the main spray port 27, the front spray port 26 and the swirl port 28 at different angles to flush the cuttings at the bottom of the well without dead angle. The variable-diameter spray head 29 increases the pressure of the flushing liquid sprayed out of the variable-diameter spray head 29 through the variable-diameter hole in the variable-diameter spray head 29, thereby preventing the front spray port 26 and the rear spray port 23 from being blocked. The swirl port 28 is arranged in a spiral manner to provide a circumferential rotating force to the front spray head 3 through the swirl port when the flushing liquid is sprayed out of the swirl port 28, thereby rotating the front spray head 3 under the action of the swirl port 28; at the same time, the flushing liquid sprayed out of the swirl port 28 rotates between the front spray head 3 and the well wall, thereby flushing the cuttings deposited at the bottom of the well wall and preventing the dispersed cuttings from being deposited at the bottom of the well wall.

[0032] The inner wall of the mounting ring 25 on the side of the front nozzle 3 is symmetrically fixed with a magnet 30. The front nozzle is fixed with a damping block A 36 and a damping block B 37 in front and back. The damping block A 36 and the damping block B 37 are respectively in sliding connection with the mounting ring 25. When the rotation speed of the front nozzle 3 is too fast, the speed of the flushing liquid sprayed from the variable-diameter nozzle 29 increases. Due to the instability of the liquid flow, the liquid is broken into a tubular cylinder and then into small droplets, thereby reducing the flushing effect of the flushing liquid on the sand accumulated at the bottom of the well. In operation, the flushing liquid enters the inside of the front nozzle 3 and drives the front nozzle 3 to rotate through the cyclone port 28. The front nozzle 3 drives the damping block A 36 and the damping block B 37 to rotate. In the process of rotation, the damping block A 36 and the damping block B 37 gradually approach or move away from the magnet 30. The magnetic flux on the damping block A 36 and the damping block B 37 changes. As a result, the damping block A 36 and the damping block B 37 generate induced current. According to Lenz's law: the magnetic field of the induced current always hinders the change of the magnetic flux that causes the induced current, that is, the magnet 30 hinders the movement of the damping block A 36 and the damping block B 37. Further, through the cooperation of the magnet 30 and the damping block A 36 and the damping block B 37, the rotation speed of the front nozzle 3 is reduced, that is, the rotation speed of the front nozzle 3 is reduced to improve the flushing effect.

[0033] The connecting shell 2 and the front nozzle 3 are fixed with a flow distribution disc 31. The flow distribution disc 31 is symmetrically provided with flow distribution holes 32. The flow distribution holes 32 are in communication with the front nozzle 3. The flow distribution disc 32 between the flow distribution holes 31 is provided with a sealing head 33 corresponding to the front central pipe 12. The sealing head 33 is in intermittent sealing connection with the central hole of the front central pipe 12.

[0034] In operation, the guide block 7 is larger than the wellhead diameter, the well wall compression spring 9 makes the roller 8 closely adhere to the well wall and enter the well, and rolls along the well wall, thereby reducing the frictional resistance through the rolling of the roller 8, facilitating upward and downward movement. The flushing liquid flows into the central hole of the rear central pipe 10 from the rear joint 4, and then enters the front nozzle 3 through the central hole of the front central pipe 12, the travel hole 24 and the flow distribution hole 31. Part of the flushing liquid in the front nozzle 3 is sprayed out through the cyclone port 28 and drives the front nozzle 3 to rotate. The other part of the flushing liquid in the front nozzle 3 is sprayed out through the main nozzle 27 and the front nozzle 26. Since the front nozzle 3 rotates under the action of the cyclone port 28, the flushing liquid sprayed out through the main nozzle 27, the front nozzle 26 and the cyclone port 28 has a certain circumferential speed, thereby the flushing liquid when flushing the cuttings, the cuttings will not deposit at the bottom of the well wall, which is beneficial to the flushing liquid to carry the cuttings to the outside of the well.

[0035] The tool goes up to the inlet, the pressure of the flushing liquid is increased, under the action of the limiting flange 11 of the rear center tube 10, the flushing liquid overcomes the elastic force of the front reset spring 13 and the rear reset spring 35 and the supporting force of the limiting head 18 on the limiting block 15 matched with the limiting slot 20, the front center tube 12 passes through the stroke hole 24 into the linking shell 2, the central hole of the front center tube 12 is sealed and connected with the sealing head 33, and the front center tube radial flow-through hole 14 is communicated with the assembly shell flow-through hole 21, that is, the rear nozzle 23 is communicated with the central hole of the front center tube 12, the flushing liquid in the front center tube 12 enters the rear nozzle 23 through the front center tube radial flow-through hole 14 and the assembly shell flow-through hole 21 in turn, and is sprayed out through the variable-diameter nozzle 29 on the rear nozzle 23, thereby flushing the cuttings in the well during the upward process. The central hole of the front center tube 12 is sealed and connected with the sealing head 33, so that the flushing liquid in the front center tube 12 no longer enters the front nozzle 3 through the shunt hole 31 to avoid the decrease of the pressure of the flushing liquid entering the rear nozzle 23, thereby avoiding the decrease of the effect of flushing the cuttings during the upward process. During the process that the central hole of the front center tube 12 is sealed and connected with the sealing head 33, the rear center tube 10 drives the limiting block 15 to move to one side of the clamping groove 19, thereby moving the limiting head 18 in the limiting block 15 to the clamping groove 19 on the inner wall of the assembly shell 1. When the limiting head 18 moves to the clamping groove 19, the flushing liquid enters the assembly hole 16 from the central hole of the front center tube 12, and pushes the limiting head 18 into the clamping groove 19 by overcoming the elastic force of the limiting block spring 17. The limiting head 18 cooperates with the clamping groove 19 to limit the position of the limiting block 15, thereby limiting the positions of the front center tube 12 and the rear center tube 10, so that the front center tube 12 always maintains sealing with the sealing head 33, and the front center tube radial flow-through hole 14 always maintains communication with the assembly shell flow-through hole 21, that is, the rear nozzle 23 always communicates with the central hole of the front center tube 12.

[0036] The horizontal well bidirectional sand-carrying cleaning tool can flush away the obstructed sand and gravel when the tool is lowered, so that the tool can be lowered smoothly. The front nozzle 3 is rotated through the cyclone port 28 on the front nozzle 3, thereby being able to clean the sand bed comprehensively. The sand and gravel adsorbed on the well wall can be removed when the tool is pulled up through the rear nozzle 23. The variable-diameter nozzle 29 increases the flow rate of the flushing liquid, so that the nozzle is not easy to be blocked. The problems that the existing tool is not easy to be pulled up and lowered, cannot clean the sand bed comprehensively, and is easy to cause new blockage and tool blockage are solved.

Claims

1. A horizontal well two-way sand-carrying well washing tool, which is composed of an assembly shell (1), a connecting shell (2), a front nozzle (3) and a rear joint (4), characterized in that: The one end of the assembly shell (1) is equipped with the rear joint (4) through the guide shell (5); the other end of the assembly shell (1) is equipped with the connecting shell (2) through the rear spray shell (22), the end of the connecting shell (2) is equipped with the front spray head (3) through the mounting ring (25); the front spray head (3) is a cylindrical cavity, the front spray head (3) is uniformly distributed with the front spray port (26), the central axis of the front spray head (3) between the front spray ports (26) is provided with the main spray port (27), the circumferential of the front spray head (3) on one side of the front spray port (26) is uniformly distributed with the rotational flow port (28); the front spray port (26), the main spray port (27) and the rotational flow port (28) are respectively communicated with the cavity of the front spray head (3); the rear spray shell (22) is uniformly distributed with the rear spray port (23); the rotational flow port (28) is spirally arranged; The rear center tube (10) is movably installed in the central hole of the rear joint (4), one end of the rear center tube (10) extends into the assembly shell (1) through the central hole of the guide shell (5), the end of the rear center tube (10) extending into the assembly shell (1) is threadedly installed with the front center tube (12), and the front center tube (12) is in sliding sealing connection with the assembly shell (1); The front center tube (12) is a variable diameter body, the front center tube (12) is sleeved with the front reset spring (13), and the front reset spring (13) is in abutting connection with the front center tube (12) and the assembly shell (1) respectively; the circumferential of the front center tube (12) at the front end of the front reset spring (13) is uniformly distributed with the front center tube radial flow-through hole (14); The end of the rear center tube (10) in the rear joint (4) is provided with the limiting flange (11), the rear reset spring (35) is sleeved on the rear center tube (10) between the limiting flange (11) and the guide shell (5); the limiting block (15) is radially and symmetrically installed between the rear center tube (10) extending into the assembly shell (1) and the front center tube (12); the limiting block (15) is radially provided with the assembly hole (16), and the assembly hole (16) is communicated with the central hole of the rear center tube (10); the assembly hole (16) is a variable diameter hole, the limiting head (18) is installed in the assembly hole (16) through the limiting block spring (17), and the limiting head (18) is in sliding sealing connection with the assembly hole (16); The assembly shell (1) is provided with the clamping groove (19) on the inner wall corresponding to the limiting head (18), the limiting sliding groove (20) is provided on the inner wall of the assembly shell (1) on one side of the clamping groove (19) corresponding to the limiting head (18), and the end of the limiting sliding groove (20) is provided in an inclined manner; the assembly shell flow-through hole (21) is provided on the assembly shell (1) on the other side of the clamping groove (19), and the assembly shell flow-through hole (21) is communicated with the rear spray port (23).

2. The horizontal well bidirectional sand-carrying cleanout tool according to claim 1, characterized in that: The front spray port (26) and the rear spray port (23) are respectively provided in an inclined manner, the front spray port (26) is provided in a 45-degree inclined manner, and the rear spray port (23) is provided in a 135-degree inclined manner; the variable diameter spray head (29) is threadedly installed in the port of the front spray port (26) and the rear spray port (23) respectively.

3. The horizontal well bidirectional sand-carrying cleanout tool of claim 1, wherein: The connecting shell (2) is cup-shaped, and a stroke hole (24) is arranged in the center of the connecting shell (2); a flow distribution disc (32) is fixed between the connecting shell (2) and the front nozzle (3), the flow distribution disc (32) is symmetrically provided with flow distribution holes (31), the flow distribution holes (31) are communicated with the front nozzle (3); the flow distribution disc (32) between the flow distribution holes (31) is provided with a sealing head (33) corresponding to the front center pipe (12), and the sealing head (33) is intermittently and sealingly connected with the center hole of the front center pipe (12).

4. The horizontal well bidirectional sand-carrying cleanout tool of claim 3, wherein: The inner wall of the mounting ring (25) on one side of the front nozzle (3) is symmetrically fixed with magnets (30); the front nozzle (3) at the two ends of the magnets (30) is fixed with damping blocks A (36) and damping blocks B (37) in front and back shapes, and the damping blocks A (36) and the damping blocks B (37) are respectively and slidingly connected with the mounting ring (25).

5. The horizontal well bidirectional sand carrying cleanout tool of claim 1, wherein: The guiding shell (5) is uniformly provided with guiding blocks (7) through positioning blocks (6), the guiding blocks (7) are limitingly and slidingly connected with the positioning blocks (6), and steel plate springs (9) are arranged between the guiding blocks (7) and the guiding shell (5); the guiding blocks (7) are uniformly provided with rollers (8).

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