Double-insurance recovery hydraulic reaction torque braking tool for horizontal well

Abstract

The invention relates to a double-insurance recovery hydraulic reaction torque braking tool for a horizontal well, and belongs to the technical field of downhole tools. The tool comprises a shell, brake sliding blocks are evenly distributed on the shell, a drive locking mechanism is arranged in the shell below the brake sliding blocks, and a double-insurance unlocking mechanism is arranged in the shell above the brake sliding blocks. According to the tool, the sliding block can be pushed to slide out and abut against the well wall by driving the locking mechanism, so that reaction torque is counteracted through friction of the braking sliding block on the well wall, the reaction torque cannot be transmitted upwards, the reaction torque transmitted by a drill bit is effectively restrained, damage to a drilling tool set is reduced, and the drilling efficiency is improved. The double-insurance unlocking mechanism can ensure that the braking sliding block is pushed to contract towards the interior of the shell, locking of the braking sliding block and the well wall is relieved, and therefore normal sliding drilling can be achieved. The problems that an existing device cannot completely eliminate reaction torque, and accidents are likely to happen are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to a horizontal well double insurance recovery hydraulic anti-torque braking tool, belonging to the technical field of downhole tools. BACKGROUND

[0002] In the conventional sliding guide drilling technology, the drill pipe does not rotate in the process of guide drilling, and is axially slid along the well wall under the driving of the power drilling tool, and the friction is extremely large in the drilling process. In the process of rotary guide drilling, the drilling tool is always in a rotating state, which can effectively reduce the friction generated by the conventional sliding drilling.

[0003] Based on the advantages and disadvantages of the existing drilling technology based on sliding guide drilling and rotary guide drilling, a method combining the conventional sliding guide technology and the rotary guide technology is proposed. The method realizes partial rotation and partial sliding of the drill string in the process of guide drilling by installing a clutch in the middle of the drill string, so as to reduce the friction torque. The friction between the clutch to the drill string part and the well wall can generate a torque to offset the reverse torque of the drill bit, but there is a problem that it is difficult to completely offset. The remaining reverse torque is transmitted to the drill pipe of the rotary sliding drilling part, which is easy to cause rapid reverse rotation of the top drive, thereby causing accidents such as alarm of the frequency converter, tripping of the drilling tool, and sticking of the drill pipe. Therefore, it is necessary to design a horizontal well double insurance recovery hydraulic anti-torque braking tool to solve the above problems. SUMMARY

[0004] The present application aims to provide a horizontal well double insurance recovery hydraulic anti-torque braking tool which can offset the reverse torque after locking to avoid accidents, and can be conveniently unlocked to normally drill after unlocking.

[0005] The technical solution of the present application is as follows: A horizontal well double insurance recovery hydraulic anti-torque braking tool, which is composed of a shell, a braking slider, a driving locking mechanism, an unlocking mechanism and a mandrel, characterized in that: a plurality of limiting slots are uniformly distributed in the circumferential direction of the shell, a braking slider is movably inserted into each limiting slot, a driving locking mechanism for upward extrusion and pushing the braking slider to lock with the well wall is arranged in the shell below the braking slider, a double insurance unlocking mechanism for downward extrusion and pushing the braking slider to reset is arranged in the shell above the braking slider, and a mandrel is arranged between the braking sliders.

[0006] The inner walls on both sides of the limiting slot are respectively provided with guide sliding grooves; a guide sliding rail is arranged on the braking slider and is connected with the guide sliding grooves by insertion.

[0007] The guide sliding grooves and the guide sliding rails are respectively arranged upwardly inclined.

[0008] The driving locking mechanism is composed of a lower sleeve, a lower end cover, a lower ball seat, a starting ball, a piston and a driving ring, the lower end cover is threadedly installed at the lower end of the lower sleeve, the lower ball seat is movably installed at the inner side of the lower sleeve above the lower end cover, and the starting ball is arranged in the central hole of the lower ball seat; the piston is sleeved at the upper end of the lower sleeve, and the piston is in sliding sealing connection with the shell; the driving ring is arranged at the top of the piston, and the driving ring is in abutting connection with the brake sliding block; the lower sleeve is in threaded connection with the shell and is in sleeved connection with the end head of the core shaft penetrating through the piston.

[0009] The lower ball seat is provided with an outer flange on the circumference thereof; the bottom of the lower sleeve is provided with a stopper, and the stopper is in sleeved connection with the outer flange.

[0010] The inner wall of the piston is arranged in spacing with the outer wall of the lower sleeve, the upper sleeve is provided with an upper communication hole above the stopper, and the upper communication hole is in communication with the annular space between the lower sleeve and the piston.

[0011] The lower ball seat below the outer flange is provided with a lower communication hole.

[0012] The double-insurance unlocking mechanism is composed of an upper ball seat, an unlocking spring, a locking sleeve and a stop ring arranged in sequence from top to bottom, the upper ball seat is fixedly connected with the shell through a shear pin and is in threaded connection with the top end head of the core shaft penetrating through the stop ring, the locking sleeve and the unlocking spring in sequence; the stop ring is in abutting connection with the brake sliding block.

[0013] The locking sleeve and the locking sleeve are provided with a locking ring, the top of the locking ring is provided with a follow-up flange, the locking sleeve is provided with a follow-up sliding groove, the follow-up sliding groove is in sliding connection with the follow-up flange; the locking ring below the follow-up sliding groove is provided with a locking hole, the core shaft is provided with a locking ball through a locking spring on the circumference thereof, and the locking ball is in plug-in connection with the locking hole.

[0014] The unlocking spring is sleeved with a spring protection sleeve, and the spring protection sleeve is in the shape of a cup with a reverse buckle.

[0015] The top end face of the stop ring is provided with a limit lock block through a fixing bolt, and the limit lock block is in sliding connection with the guide sliding groove.

[0016] The beneficial effects of the present application are as follows: The horizontal well double-insurance recovery hydraulic counter-torque braking tool can push the sliding block out of abutting against the well wall through the driving locking mechanism, so as to brake and offset the counter-torque by the friction between the brake sliding block and the well wall, so that the counter-torque cannot be transmitted upward, the counter-torque transmitted by the drill bit is effectively inhibited, the damage of the drilling tool group is reduced, and the drilling efficiency is improved. The double-insurance unlocking mechanism can ensure that the brake sliding block is retracted into the shell, and the locking between the brake sliding block and the well wall is released, so that the drilling can be normally slid. The problem that the existing device cannot completely eliminate the counter-torque and is prone to accidents is solved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the present application; Figure 2 is a structural schematic diagram of the shell of the present application; Figure 3 is a structural schematic diagram of the brake slider of the present application; Figure 4 is a distribution schematic diagram of the brake slider of the present application; Figure 5 is a schematic diagram of the upstroke state of the piston of the present application; Figure 6 is a schematic diagram of the extended state of the brake slider of the present application; Figure 7 is a schematic diagram of the upstroke state of the piston of the present application; Figure 1 is an enlarged schematic diagram at A in the above figure; Figure 8 is a schematic diagram of the locked state of the lock ball of the present application; Figure 9 is a schematic diagram of the forced unlocking state of the present application.

[0018] In the figure: 1, shell, 2, brake slider, 3, mandrel, 4, limiting slot, 5, guide sliding slot, 6, guide sliding rail, 7, lower sleeve, 8, lower end cover, 9, lower ball seat, 10, starting ball, 11, piston, 12, driving ring, 13, outer flange, 14, stop, 15, upper communication hole, 16, lower communication hole, 17, upper ball seat, 18, unlocking spring, 19, lock sleeve, 20, stop ring, 21, shear pin, 22, lock ring, 23, follow-up flange, 24, follow-up sliding slot, 25, locking hole, 26, lock spring, 27, lock ball, 28, spring protection sleeve, 29, limiting lock block. DETAILED DESCRIPTION

[0019] The horizontal well double safety recovery hydraulic counter torque braking tool is composed of a shell 1, braking sliding blocks 2, a driving locking mechanism, an unlocking mechanism and a mandrel 3. The shell 1 is uniformly distributed with limiting slots 4 on the circumference, and the braking sliding blocks 2 are movably inserted into the limiting slots 4. The limiting slots 4 enable the braking sliding blocks 2 to extend out of the shell 1, and then the braking sliding blocks 2 can abut against the well wall outside the shell 1. Through the friction between the braking sliding blocks 2 and the well wall, the braking sliding blocks 2 are not easy to rotate, so that the shell 1 is not easy to rotate, thereby offsetting the counter torque transmitted to the shell 1, preventing the counter torque from being transmitted upward through the shell 1, protecting the upper drill string connected with the shell 1 and the top drive, preventing the drill string above the shell 1 from being tripped and the top drive from being reversed, and avoiding the alarm of the frequency converter connected with the top drive and the drill string tripping accident. The driving locking mechanism is arranged in the shell 1 below the braking sliding blocks 2, so as to push the braking sliding blocks 2 upward through the driving locking mechanism under the action of the downhole pressure, and then push the braking sliding blocks 2 out of the shell 1, so that the braking sliding blocks 2 abut against the well wall to brake, thereby offsetting the counter torque. The double safety unlocking mechanism is arranged in the shell 1 above the braking sliding blocks 2, so as to extrude the braking sliding blocks 2 downward through the double safety unlocking mechanism under the action of the downhole pressure, so that the braking sliding blocks 2 are retracted into the shell 1 and are separated from the well wall, and then the braking sliding blocks 2 are unlocked, so that the top drive can drive the drill string, the shell 1 and the drilling tool connected with the shell 1 to rotate in sequence, thereby performing normal drilling operation. The mandrel 3 is arranged between the braking sliding blocks 2, so as to guide the downflow of the drilling fluid through the mandrel 3.

[0020] The limiting slots 4 are respectively provided with guide sliding grooves 5 on the inner walls of the two sides. The braking sliding blocks 2 are provided with guide sliding rails 6, and the guide sliding rails 6 are connected with the guide sliding grooves 5 through insertion. The guide sliding grooves 5 and the guide sliding rails 6 are respectively arranged obliquely upward. The guide sliding grooves 5 control the movement direction of the guide sliding rails 6, thereby controlling the movement direction of the braking sliding blocks 2. When the braking sliding blocks 2 are pushed upward, the braking sliding blocks 2 move obliquely upward and outward under the action of the guide sliding grooves 5 and the guide sliding rails 6, thereby pushing the braking sliding blocks 2 out of the shell 1, so that the braking sliding blocks 2 can abut against the well wall to be locked. When the braking sliding blocks 2 are pushed downward, the braking sliding blocks 2 move obliquely downward and inward under the action of the guide sliding grooves 5 and the guide sliding rails 6, thereby retracting the braking sliding blocks 2 into the shell 1, so that the braking sliding blocks 2 are separated from the well wall to be unlocked.

[0021] The driving locking mechanism is composed of a lower sleeve 7, a lower end cover 8, a lower ball seat 9, a starting ball 10, a piston 11 and a driving ring 12, the lower end cover 8 is threadedly installed at the lower end of the lower sleeve 7, the lower ball seat 9 is movably installed at the inner side of the lower sleeve 7 above the lower end cover 8, and the starting ball 10 is arranged in the central hole of the lower ball seat 9; the piston 11 is sleeved at the upper end of the lower sleeve 7 and is in sliding sealing connection with the shell 1; the driving ring 12 is arranged at the top of the piston 11 and is in abutting connection with the brake sliding block 2; the lower sleeve 7 is threadedly connected with the shell 1 and is sleeved with the end head of the core shaft 3 passing through the piston 11. The starting ball 10 blocks the main flow channel (the central hole of the lower ball seat 9) to pressurize the lower ball seat 9, and then pressurize the inner side of the piston 11, so as to push the piston 11 to move upward under the pressure of the drilling fluid, and push the driving ring 12 to move upward in the process of the piston 11 moving upward, thereby pushing the brake sliding block 2 to move upward, so that the brake sliding block 2 can extend outside the shell 1 and abut against the well wall. The driving ring 12 is made of wear-resistant material, such as ceramic, which can effectively reduce the friction between the brake sliding block 2 and the driving ring 12, thereby reducing the wear; at the same time, the driving ring 12 can be separated from the piston 11, so that the driving ring 12 can be conveniently replaced after the driving ring 12 is worn.

[0022] An outer flange 13 is arranged on the circumference of the lower ball seat 9; a stop 14 is arranged at the bottom of the lower sleeve 7 and is sleeved with the outer flange 13. The outer flange 13 cooperates with the stop 14 and the lower end cover 8 to limit the position of the lower ball seat 9, so as to avoid the lower ball seat 9 from slipping off the lower sleeve 7.

[0023] The inner wall of the piston 11 is arranged in a spaced manner with the outer wall of the lower sleeve 7, an upper communication hole 15 is arranged on the lower sleeve 7 above the stop 14, and the upper communication hole 15 is in communication with the annular space between the lower sleeve 7 and the piston 11. The upper communication hole 15 is in communication with the annular space between the core shaft 3 and the lower sleeve 7 and the piston 11, so that the drilling fluid can enter the inner side of the piston 11 through the upper communication hole 15, thereby improving the pressure in the piston 11 when the pressure in the core shaft 3 is built up, so as to push the piston 11 to move upward.

[0024] A lower communication hole 16 is arranged on the lower ball seat 9 below the outer flange 13, so that the inner side and the outer side of the lower ball seat 9 are communicated through the lower communication hole 16 when the central hole of the lower ball seat 9 is blocked by the starting ball 10, the drilling fluid in the core shaft 3 can flow into the shell 1 below the lower end cover 8 through the central hole of the lower ball seat 9 and the lower communication hole 16 in sequence, and then continue to flow downward, so as to maintain the ability of the drilling fluid to flow downward and drive the drilling tool.

[0025] The double insurance unlocking mechanism is composed of an upper ball seat 17, an unlocking spring 18, a locking sleeve 19 and a stop ring 20 arranged in sequence from top to bottom. The upper ball seat 17 is fixedly connected with the shell 1 through a shear pin 21 and is threadedly connected with the top end of the mandrel 3 which passes through the stop ring 20, the locking sleeve 19 and the unlocking spring 18 in sequence. The stop ring 20 is abuttingly connected with the brake slider 2. The unlocking spring 18 is used to push the locking sleeve 19 downward under the support of the upper ball seat 17 through the elastic force of the unlocking spring 18 itself, and then push the stop ring 20 downward in the process of the downward movement of the locking sleeve 19, so as to push the brake slider 2 downward, and make the brake slider 2 move into the shell 1 under the action of the guide sliding groove 5 and the guide sliding rail 6, thereby pushing the brake slider 2 to separate from the well wall and release the locking. The stop ring 20 is made of wear-resistant material, such as ceramic, which can effectively reduce the friction between the brake slider 2 and the stop ring 20, thereby reducing the wear; at the same time, the stop ring 20 can be separated from the piston 11, so that the stop ring 20 can be conveniently replaced after the stop ring 20 is worn out.

[0026] A locking ring 22 is arranged between the mandrel 3 and the locking sleeve 19. The top of the locking ring 22 is provided with a follow-up flange 23, and the locking sleeve 19 is provided with a follow-up sliding groove 24 which is in sliding connection with the follow-up flange 23. The locking ring 22 below the follow-up sliding groove 24 is provided with a locking hole 25, and the circumference of the mandrel 3 is provided with a locking ball 27 which is installed through a locking spring 26. The locking ball 27 is in plug-in connection with the locking hole 25. The locking ball 27 is used to lock the locking ring 22 and the mandrel 3 through the locking ball 27 after the locking ball 27 is inserted into the locking hole 25, and then lock the positions of the locking ring 22 and the upper ball seat 17, so that the locking sleeve 19 can only slide within the range of the follow-up sliding groove 24, on the one hand, to avoid excessive extrusion of the unlocking spring 18 when the brake slider 2 moves upward, thereby protecting the unlocking spring 18; on the other hand, to reduce the elastic force of the unlocking spring 18 on the brake slider 2 when the drilling fluid pressure fluctuates, so that the pushing force of the driving ring 12 on the brake slider 2 is more applied between the brake slider 2 and the well wall, thereby ensuring that the acting force between the brake slider 2 and the well wall can offset the counter torque.

[0027] A spring protection sleeve 28 is sleeved on the unlocking spring 18, and the spring protection sleeve 28 is in the shape of an inverted cup. The spring protection sleeve 28 is used to limit the stroke of the locking sleeve 19, so that the locking sleeve 19 is not easy to excessively extrude the unlocking spring 18 in the process of upward movement, thereby protecting the unlocking spring 18 and making the unlocking spring 18 not easy to be damaged.

[0028] The top end face of the stop ring 20 is provided with a limiting lock block 29 which is fixed by a fixing bolt and is in sliding connection with the guide sliding groove 5. The limiting lock block 29 limits the movement of the stop ring 20, avoids excessive movement of the stop ring 20, avoids excessive extrusion of the unlocking spring 18 by the locking sleeve 19, avoids excessive extrusion of the unlocking spring 18, protects the unlocking spring 18, limits the movement range of the brake slider 2 by limiting the movement of the stop ring 20, and avoids the brake slider 2 from slipping off the housing 1.

[0029] When the hydraulic anti-torque brake tool with double safety for horizontal well offsets the anti-torque, the starting ball 10 is put into the downhole, and the starting ball 10 passes through the drill string, the housing 1, the upper ball seat 17, the mandrel 3, the lower sleeve 7 and enters the lower ball seat 9 in sequence. The starting ball entering the lower ball seat 9 blocks the central hole of the lower ball seat 9, the pressure of the lower ball seat 9 is built up, and the lower ball seat 9 is pushed downward under the action of the drilling fluid pressure. In the process of the lower ball seat 9 moving downward, the lower communication hole 16 moves below the lower end cover 8, the central hole of the lower ball seat 9 is communicated with the housing 1 below the lower end cover 8 through the lower communication hole 16, and thus the drilling fluid can flow downward. In the process of the lower ball seat 9 moving downward, the top end of the lower ball seat 9 moves below the upper communication hole 15, the mandrel 3 is communicated with the annulus between the piston 11 and the lower sleeve 7 through the upper communication hole 15. Since the starting ball 10 blocks the central hole of the lower ball seat 9, the drilling fluid flows downward through the lower communication hole 16, the flow area of the drilling fluid is reduced, the pressure of the lower ball seat 9 is built up, and thus the piston 11 is pushed upward by the drilling fluid with increased pressure, the brake slider 2 is pushed upward by the driving ring 12 to overcome the elastic force of the unlocking spring 18 in the process of the piston 11 moving upward, the brake slider 2 moves outward of the housing 1 under the action of the guide sliding groove 5 and the guide sliding rail 6 in the process of the brake slider 2 moving upward, and thus the brake slider 2 abuts against the well wall, the anti-torque is offset by the action force between the brake slider 2 and the well wall. After the starting ball 10 is put in, the drilling fluid pressure is appropriately increased, the pushing force on the piston 11 is increased, and the action force between the brake slider 2 and the well wall is increased, so as to ensure that the anti-torque can be offset. In the process of the brake slider 2 moving upward, the stop ring 20, the locking sleeve 19 and the locking ring 22 are sequentially driven to move upward, in the process of the locking ring 22 moving upward, the locking hole 25 gradually moves upward, the locking ball 27 is inserted into the locking hole 25 under the action of the elastic force of the locking spring 26, the position of the locking ring 22 and the mandrel 3 is locked, the position of the locking ring 22 and the upper ball seat 17 is locked, the locking sleeve 19 can only slide within the range of the follow-up sliding groove 24, on the one hand, the unlocking spring 18 is protected from being excessively extruded when the brake slider 2 moves upward, and on the other hand, the elastic force of the unlocking spring 18 on the brake slider 2 is reduced when the drilling fluid pressure fluctuates, the pushing force of the driving ring 12 on the brake slider 2 is more applied between the brake slider 2 and the well wall, and the action force between the brake slider 2 and the well wall can offset the anti-torque.

[0030] When the hydraulic anti-torque brake tool for horizontal well double insurance recovery is unlocked, the pressure of the drilling fluid is reduced to the unlocking spring 18, which can push the locking sleeve 19 downward by its own elastic force. During the downward movement of the locking sleeve 19, the locking ring 22 is pushed downward by the follow-up sliding groove 24 and the follow-up flange 23, the locking ball 27 is extruded out of the locking hole 25, the locking of the locking ring 22 and the mandrel 3 is released, and thus the restriction of the locking sleeve 19 is released. During the downward movement of the locking sleeve 19 under the pushing of the unlocking spring 18, the locking sleeve 19 pushes the brake slider 2 downward by the stop ring 20. During the downward movement of the brake slider 2, the brake slider 2 is pushed inward to the housing 1 under the action of the guide sliding groove 5 and the guide sliding rail 6, the locking with the well wall is released, and thus the unlocking is realized, so that the normal rotary drilling can be realized.

[0031] When the unlocking spring 18 cannot be unlocked by the elastic force, a large-diameter starting ball is put downhole, the large-diameter starting ball blocks the upper ball seat 17, and the pressure above the upper ball seat 17 is increased. When the pressure of the upper ball seat 17 increases to the shear pressure of the shear pin 21, the shear pin 21 is broken, the upper ball seat 17 is pushed downward by the large pressure above the upper ball seat 17, and during the downward movement of the upper ball seat 17, the upper ball seat 17 pushes the brake slider 2 to move by the spring protection sleeve 28, the locking sleeve 19 and the stop ring 20 in sequence, and forced unlocking is realized, so that the brake slider 2 is unlocked from the well wall, and the tool string is prevented from being broken downhole under the action of the brake slider 2 and the well wall.

[0032] The hydraulic anti-torque brake tool for horizontal well double insurance recovery can push the slider 2 out of abutment against the well wall by driving the locking mechanism, so that the brake slider 2 frictionally brakes the well wall to offset the reverse torque, so that the reverse torque cannot be transmitted upward, the reverse torque transmitted by the drill bit is effectively inhibited, the damage of the drilling tool group is reduced, and the drilling efficiency is improved. The double insurance unlocking mechanism can ensure that the brake slider 2 is retracted into the housing 1, the locking of the brake slider 2 and the well wall is released, and thus the normal sliding drilling can be realized. The problem that the existing device cannot completely eliminate the reverse torque and is prone to accidents is solved.

Claims

1. A horizontal well double-insurance recovery hydraulic anti-torque braking tool, comprising a housing (1), a brake slider (2), a drive locking mechanism, an unlocking mechanism, and a spindle (3), characterized in that: The housing (1) is evenly distributed with limit slots (4) in the circumferential direction. A brake slider (2) is movably inserted into the limit slot (4). A drive locking mechanism is provided in the housing (1) below the brake slider (2) to push the brake slider (2) upward and lock it with the well wall. A double-insurance unlocking mechanism is provided in the housing (1) above the brake slider (2) to push the brake slider (2) downward and reset it. A spindle (3) is provided between the brake sliders (2).

2. The horizontal well double-insurance recovery hydraulic reverse torque braking tool according to claim 1, characterized in that: The limiting slot (4) is provided with guide grooves (5) on both sides of the inner wall; the brake slider (2) is provided with guide rails (6), and the guide rails (6) are inserted into the guide grooves (5); the guide grooves (5) and guide rails (6) are respectively inclined upward.

3. The horizontal well double-insurance recovery hydraulic reverse torque braking tool according to claim 1, characterized in that: The drive locking mechanism consists of a lower sleeve (7), a lower end cover (8), a lower ball seat (9), a starting ball (10), a piston (11), and a drive ring (12). The lower end cover (8) is threaded onto the lower end of the lower sleeve (7). The lower ball seat (9) is movably installed on the inner side of the lower sleeve (7) above the lower end cover (8). The starting ball (10) is provided in the center hole of the lower ball seat (9). The piston (11) is fitted onto the upper end of the lower sleeve (7). The piston (11) is slidably sealed to the housing (1). The drive ring (12) is provided on the top of the piston (11). The drive ring (12) is abutted against the brake slider (2). The lower sleeve (7) is threaded to the housing (1) and fitted onto the end of the spindle (3) that passes through the piston (11).

4. The horizontal well double-insurance recovery hydraulic anti-torque braking tool according to claim 3, characterized in that: The lower ball seat (9) is provided with an outer flange (13) on its circumference; the bottom of the lower sleeve (7) is provided with a stop (14), and the stop (14) is fitted and connected to the outer flange (13).

5. A horizontal well double-insurance recovery hydraulic reverse torque braking tool according to claim 4, characterized in that: The inner wall of the piston (11) is spaced apart from the outer wall of the lower sleeve (7). An upper connecting hole (15) is provided on the lower sleeve (7) above the stop (14). The upper connecting hole (15) is connected to the annular space between the lower sleeve (7) and the piston (11).

6. The horizontal well double-insurance recovery hydraulic anti-torque braking tool according to claim 4, characterized in that: A lower connecting hole (16) is provided on the lower ball seat (9) below the outer flange (13).

7. A horizontal well double-insurance recovery hydraulic anti-torque braking tool according to claim 2, characterized in that: The double-insurance unlocking mechanism consists of an upper ball seat (17), an unlocking spring (18), a locking sleeve (19), and a stop ring (20) arranged sequentially from top to bottom. The upper ball seat (17) is fixedly connected to the housing (1) by a shear pin (21) and threaded to the top end of the spindle (3) that passes through the stop ring (20), the locking sleeve (19), and the unlocking spring (18) in sequence. The stop ring (20) is abutted against the brake slider (2).

8. A horizontal well double-insurance recovery hydraulic reverse torque braking tool according to claim 7, characterized in that: A locking ring (22) is provided between the spindle (3) and the locking sleeve (19). A follower flange (23) is provided at the top of the locking ring (22). A follower groove (24) is provided on the locking sleeve (19). The follower groove (24) is slidably connected to the follower flange (23). A locking hole (25) is provided on the locking ring (22) below the follower groove (24). A locking ball (27) is installed on the circumference of the spindle (3) through a locking spring (26). The locking ball (27) is inserted into the locking hole (25).

9. A horizontal well double-insurance recovery hydraulic anti-torque braking tool according to claim 7, characterized in that: The unlocking spring (18) is fitted with a spring protective sleeve (28), which is an inverted cup-shaped body.

10. A horizontal well double-insurance recovery hydraulic reverse torque braking tool according to claim 7, characterized in that: The top end face of the stop ring (20) is fitted with a limit lock block (29) by a fixing bolt, and the limit lock block (29) is slidably connected to the guide groove (5).

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