A liquid-driven directional sidetracking wellbore tool

Abstract

The present invention belongs to drilling operation tools, and particularly relates to a liquid-driven directional sidetracking wellbore tool. The liquid-driven directional sidetracking wellbore tool mainly consists of an inclination short joint, a transmission short joint, a valve group short joint, an oil tank short joint, an anchoring short joint and a battery short joint. The working orientation of the sidetracking wellbore drill string is determined by the working position of the inclination short joint. A pressure signal pre-loaded with the working position of the inclination short joint can be released from the wellhead, and through the control of electrical components by the control circuit in the liquid-driven directional sidetracking wellbore tool, the adjustment of the working position of the inclination short joint is realized, so that the drill string is in a specified working orientation, and the control of the sidetracking orientation of the drill string is realized. The present invention can adjust the sidetracking drilling direction of the drill string according to actual requirements, improve the applicability of the radial well technology and the reservoir encounter rate, and save the time and cost of the sidetracking wellbore.

Description

Technical Field

[0001] The present invention relates to an operating tool for oil drilling operations, in particular to a liquid-driven directional sidetracking wellbore tool, belonging to the field of drilling operating tools. Background Art

[0002] The radial horizontal well technology can effectively penetrate the mud contamination zone, multiply the oil drainage area, and increase the oil and gas production per well.

[0003] It is an effective means for the transformation of old oil wells in oil fields, potential tapping of oil reservoirs, and stable and increased production. At present, the sidetracking of radial horizontal wells mainly uses tools such as whipstocks and deflectors to sidetrack out of the original wellbore at a certain preset angle. When using traditional whipstocks, usually only one radial horizontal wellbore can be sidetracked at a certain horizontal layer. At the same time, the whipstock will be abandoned in the well without recovery after the sidetracking operation, resulting in waste of resources and blockage of the original wellbore. To improve the reservoir encounter rate and oil production efficiency of the radial horizontal well technology and save the tool usage cost, we have developed a liquid-driven directional sidetracking wellbore tool, which can not only meet the working requirements of the sidetracking wellbore, but also sidetrack multiple sidetracking wellbores within a circumferential 360° range at a specified layer in the oil well, improving the reservoir encounter rate; and can be recycled repeatedly for multiple times to realize the co-production of new and old wellbores. Therefore, inventing a liquid-driven directional sidetracking wellbore tool is of great significance for improving the reservoir encounter rate, utilization rate of old wells, and oil well production increase. At the same time, it provides a new theoretical and technical support for the progress and popularization and application of multi-system related technologies such as radial wells, slimhole sidetracking wells, and flexible drill string sidetracking wells. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems and provide a liquid-driven directional sidetracking wellbore tool that can adjust the drilling azimuth of the drill string according to actual needs, is easy to recover, and has a reasonable structure.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A liquid-driven directional sidetracking wellbore tool, characterized in that: the working orientation of the drill string is adjusted by the working position of the whipstock sub, so the key to directional sidetracking lies in the control of the working position of the whipstock sub; the liquid-driven directional sidetracking wellbore tool internally adopts a closed oil circuit to control and adjust the working position of the whipstock sub by hydraulic drive; the whipstock sub includes a whipstock body, whipstock body anchor claws, springs, anchor claw pressing strips, and a whipstock body oil chamber cover. The lower part of the whipstock body is connected to a slewing bearing, and the relative rotation between the whipstock sub and the drive sub is realized through the slewing bearing; four anchor claw grooves and four key grooves are evenly arranged circumferentially on the outer circumference of the whipstock body. The anchor claw grooves are used to install springs and whipstock body anchor claws, and the key grooves are used to install anchor claw pressing strips. A hydraulic oil chamber is arranged inside the whipstock body to provide an anchoring force for the whipstock body anchor claws through hydraulic oil. The bottom of the whipstock body is provided with an oil chamber cover connection threaded hole, a slewing bearing inner ring connection threaded hole, and a motor connection threaded hole, which are respectively connected to the whipstock body oil chamber cover, the slewing bearing inner ring, and the hydraulic rotary motor through machine screws; the drive sub includes a drive sub housing, a hydraulic rotary motor, and an oil passage block. The upper end of the drive sub housing is connected to the outer ring of the slewing bearing, and the lower part of the drive sub housing is connected to the valve group sub; the drive sub housing is provided with an outer ring connection threaded hole of the slewing bearing, a sealing groove, a motor seat, a motor fixing through hole, and an oil passage block connection through hole. The outer ring of the slewing bearing is connected above the drive sub through the outer ring connection threaded hole of the slewing bearing by machine screws. The motor seat is used to install the hydraulic rotary motor, and the hydraulic rotary motor and the drive sub housing are connected through the motor fixing through hole by machine screws. The oil passage block and the drive sub housing are connected through the oil passage block connection through hole by machine screws; the valve group sub includes a valve group sub housing, a drive-valve group sub oil circuit rotary connection block, a reversing valve, a reversing valve bracket, a tool anchoring control valve, a whipstock body anchoring control valve, a valve group bracket, a flow dividing block, a pump bracket, a hydraulic oil pump, a driving motor, a motor bracket, and a valve group-tank sub oil circuit rotary connection block; the lower end of the valve group sub is connected to the upper end of the tank sub, the lower end of the tank sub is connected to the upper end of the anchoring sub, and the lower end of the anchoring sub is connected to the upper end of the battery sub; the tank sub includes a tank, a tank cover, and a piston. The piston divides the interior of the tank into a hydraulic oil chamber and a compressed gas chamber; the anchoring sub includes an anchoring-tank sub oil circuit rotary connection block and a hydraulic anchor; the battery sub includes a battery sub housing, an electrical signal control board, a pressure sensor, and a battery.

[0007] In a liquid-driven directional sidetracking wellbore tool in the above solution, the anchoring function of the entire tool and the rotation and anchoring functions of the whipstock sub are realized through the internal closed oil circuit. The hydraulic oil pump drives the hydraulic oil into the oil circuit. The hydraulic oil respectively enters the hydraulic anchor and the whipstock body after being regulated by the tool anchoring control valve and the whipstock body anchoring control valve. The hydraulic oil enters the hydraulic rotary motor after being regulated by the reversing valve. The reversing valve can make the hydraulic rotary motor rotate clockwise or counterclockwise by switching the working position.

[0008] A hydraulic-driven directional sidetracking wellbore tool in the above solution, whose power comes from the battery built in the battery sub-section. The pressure sensor and the electrical signal control board in the battery sub-section decode and translate the pressure signal released from the wellhead, control the drive motor to drive the hydraulic oil pump and the corresponding oil circuit control valve, so that the hydraulic oil enters the specified components, realizing the anchoring of the entire hydraulic-driven directional sidetracking wellbore tool and the control of the working position of the whipstock sub-section and the anchoring of the working position of the whipstock sub-section.

[0009] A hydraulic-driven directional sidetracking wellbore tool in the above solution, the hydraulic rotary motor can drive the whipstock body to rotate 360° clockwise or 360° counterclockwise from the initial position. The rotation direction is determined by the minor arc between the set working position of the whipstock body and its initial position. When the subsequent working position of the whipstock body needs to be adjusted, the rotation direction is determined by the minor arc between the new working position and the working position before adjustment; the included angle of the whipstock body is 6°, and the inclined surface of the whipstock body has a certain arc; the working position of the whipstock sub-section can be regarded as the working position of the whipstock body.

[0010] A hydraulic-driven directional sidetracking wellbore tool in the above solution can cooperate with the drill string to drill multiple sidetracks within a circumferential range of 360° at a specified horizontal layer in the oil well. Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of a hydraulic-driven directional sidetracking wellbore tool of the present invention;

[0012] Figure 2 is a schematic external view of a hydraulic-driven directional sidetracking wellbore tool of the present invention;

[0013] Figure 3 is a schematic structural diagram of the whipstock body of the present invention;

[0014] Figure 4 is a schematic structural diagram of the outer shell of the transmission sub-section of the present invention;

[0015] Figure 5 is a schematic structural diagram of the fuel tank sub-section of the present invention;

[0016] Figure 6 is a schematic structural diagram of the anchoring sub-section of the present invention;

[0017] In the figure: 1. Inclined guide, 1a. Anchor claw groove, 1b. Keyway, 1c. Hydraulic oil chamber, 1d. Oil chamber cover connection threaded hole, 1e. Slewing bearing inner ring connection threaded hole, 1f. Motor connection threaded hole; 2. Inclined guide anchor claw; 3. Spring; 4. Anchor claw pressing strip; 5. Inclined guide oil chamber cover; 6. Slewing bearing; 7. Transmission short joint housing, 7a. Slewing bearing outer ring connection threaded hole, 7b. Sealing groove, 7c. Motor seat, 7d. Motor fixing through hole, 7e. Oil passage block connection through hole; 8. Hydraulic rotary motor; 9. Oil passage block; 10. Valve group short joint housing; 11. Transmission-valve group short joint oil circuit rotary connection block; 12. Directional control valve; 13. Directional control valve bracket; 14. Tool anchoring control valve; 15. Inclined guide anchoring control valve; 16. Valve group bracket; 17. Manifold block; 18. Pump bracket; 19. Hydraulic oil pump; 20. Driving motor; 21. Motor bracket; 22. Valve group - fuel tank short joint oil circuit rotary connection block; 23. Fuel tank; 24. Fuel tank cover; 25. Piston; 26. Anchoring - fuel tank short joint oil circuit rotary connection block; 27. Hydraulic anchor; 28. Battery short joint housing; 29. Electric signal control board; 30. Pressure sensor; 31. Battery. Detailed implementation mode

[0018] The present invention will be further described below in conjunction with the accompanying drawings and the detailed implementation mode.

[0019] 1. As Figure 1-6As shown in the figure, a liquid-driven directional sidetracking wellbore tool, characterized in that: the working orientation of the drill string is adjusted by the working position of the whipstock sub, so the key to directional sidetracking lies in the control of the working position of the whipstock sub; the internal of the liquid-driven directional sidetracking wellbore tool adopts a closed oil circuit to control and adjust the working position of the whipstock sub by means of hydraulic drive; the whipstock sub includes a whipstock body 1, whipstock body anchor claws 2, a spring 3, an anchor claw pressing strip 4, and a whipstock body oil chamber cover 5. The lower part of the whipstock body 1 is connected to a slewing bearing 6, and the relative rotation between the whipstock sub and the drive sub is realized through the slewing bearing 6; 4 anchor claw grooves 1a and 4 key grooves 1b are evenly arranged circumferentially on the outer circumference of the whipstock body 1. The anchor claw grooves 1a are used to install the spring 3 and the whipstock body anchor claws 2, and the key grooves 1b are used to install the anchor claw pressing strip 4. A hydraulic oil chamber 1c is arranged inside the whipstock body 1 to provide an anchoring force for the whipstock body anchor claws 2 through hydraulic oil. Threaded holes 1d for connecting the oil chamber cover, threaded holes 1e for connecting the inner ring of the slewing bearing, and threaded holes 1f for connecting the motor are arranged at the bottom of the whipstock body 1, and are respectively connected to the whipstock body oil chamber cover 5, the inner ring of the slewing bearing 6, and the hydraulic rotary motor 8 through machine screws; the drive assembly includes a drive sub housing 7, a hydraulic rotary motor 8, and an oil passing block 9. The upper end of the drive sub housing 7 is connected to the outer ring of the slewing bearing 6, and the lower part of the drive sub housing 7 is connected to a valve group sub; the drive sub housing 7 is provided with threaded holes 7a for connecting the outer ring of the slewing bearing, a sealing groove 7b, a motor seat 7c, a motor fixing through hole 7d, and an oil passing block connecting through hole 7e. The outer ring of the slewing bearing 6 is connected above the drive sub through the threaded holes 7a for connecting the outer ring of the slewing bearing by means of machine screws. The motor seat 7c is used to install the hydraulic rotary motor 8, and the hydraulic rotary motor 8 and the drive sub housing 7 are connected through the motor fixing through hole 7d by means of machine screws. The oil passing block 9 and the drive sub housing 7 are connected through the oil passing block connecting through hole 7e by means of machine screws; the valve group sub includes a valve group sub housing 10, a drive-valve group sub oil circuit rotary connecting block 11, a reversing valve 12, a reversing valve bracket 13, a tool anchoring control valve 14, a whipstock body anchoring control valve 15, a valve group bracket 16, a flow dividing block 17, a pump bracket 18, a hydraulic oil pump 19, a drive motor 20, a motor bracket 21, and a valve group-tank sub oil circuit rotary connecting block 22; the lower end of the valve group sub is connected to the upper end of the tank sub, the lower end of the tank sub is connected to the upper end of the anchoring sub, and the lower end of the anchoring sub is connected to the upper end of the battery sub; the tank sub includes a tank 23, a tank cover 24, and a piston 25. The piston 25 divides the interior of the tank 23 into a hydraulic oil chamber and a compressed gas chamber; the anchoring sub includes an anchoring-tank sub oil circuit rotary connecting block 26 and a hydraulic anchor 27; the battery sub includes a battery sub housing 28, an electrical signal control board 29, a pressure sensor 30, and a battery 31.

[0020] 2. A liquid-driven directional sidetracking wellbore tool realizes the anchoring function of the entire tool and the rotation and anchoring functions of the whipstock sub through a closed oil circuit inside. The hydraulic oil pump drives hydraulic oil into the oil circuit. After the hydraulic oil passes through the tool anchoring control valve 14 and the whipstock body anchoring control valve 15 to regulate the oil circuit, it enters the hydraulic anchor 27 and the whipstock body 1 respectively. After the hydraulic oil passes through the reversing valve 12 to regulate the oil circuit, it enters the hydraulic rotary motor 8. The reversing valve 12 can make the hydraulic rotary motor 8 rotate clockwise or counterclockwise by switching the working position.

[0021] 3. A liquid-driven directional sidetracking wellbore tool, whose power comes from the battery 31 built in the battery sub. The pressure sensor 30 and the electrical signal control board 29 in the battery sub decode and translate the pressure signal released from the wellhead, and control the drive motor 20 to drive the hydraulic oil pump 19 and the corresponding oil circuit control valves, so that the hydraulic oil enters the specified components, realizing the anchoring of the entire liquid-driven directional sidetracking wellbore tool and the control of the working position of the whipstock sub and the anchoring of the working position of the whipstock sub.

[0022] 4. The hydraulic rotary motor 8 can drive the whipstock body 1 to rotate 360° clockwise or 360° counterclockwise from the initial position. The rotation direction is determined by the minor arc between the set working position of the whipstock body 1 and its initial position. When the subsequent working position of the whipstock body 1 needs to be adjusted, the rotation direction is determined by the minor arc between the new working position and the working position before adjustment; the inclination angle of the whipstock body 1 is 6°, and the inclined surface of the whipstock body 1 is provided with a certain arc; the working position of the whipstock sub can be regarded as the working position of the whipstock body 1.

[0023] 5. A liquid-driven directional sidetracking wellbore tool can cooperate with the sidetracking drill string to sidetrack multiple sidetracks within a 360° circumferential range at a specified horizontal layer in the oil well.

[0024] 6. A working process of a liquid-driven directional sidetracking wellbore tool is characterized by including the following steps:

[0025] S1. In the initial state, the whipstock body 1 is located at the initial position, the whipstock body anchor claws 2 are in a contracted state, and the liquid-driven directional sidetracking wellbore tool is grasped by the lowering tool. When the liquid-driven directional sidetracking wellbore tool is lowered to the specified depth, a pressure signal pre-loaded with anchoring the entire liquid-driven directional sidetracking wellbore tool is released from the wellhead into the oil well. After the pressure sensor 30 receives the pressure signal in the oil well, it starts to discriminate the pressure signal and convert it into an electrical signal and transmits it to the electrical signal control board 29. The electrical signal control board 29 controls the opening of the tool anchoring control valve 14, and the drive motor 20 drives the hydraulic oil pump 19 to deliver hydraulic oil into the hydraulic anchor, completing the anchoring of the entire liquid-driven directional sidetracking wellbore tool in the oil well casing.

[0026] S2. After the hydraulic-driven directional sidetracking wellbore tool is fully anchored, the tool anchoring control valve 14 is closed, thereby locking the anchoring oil circuit of the hydraulic-driven directional sidetracking wellbore tool and keeping the hydraulic-driven directional sidetracking wellbore tool in the anchored state. Lower the tool and retract it upward to keep the hydraulic-driven directional sidetracking wellbore tool at the designated position in the oil well.

[0027] S3. When the hydraulic-driven directional sidetracking wellbore tool is working, the working position of the whipstock 1 needs to be adjusted. Release the pressure signal pre-loaded with the working position of the whipstock 1 from the wellhead into the oil well. After the pressure sensor 30 of the hydraulic-driven directional sidetracking wellbore tool receives the pressure signal in the oil well, it starts to discriminate the pressure signal, converts it into an electrical signal and transmits it to the electrical signal control board 29. The electrical signal control board 29 controls the opening of the reversing valve 12. The driving motor 20 drives the hydraulic oil pump 19 to deliver hydraulic oil into the hydraulic rotary motor 8, so that the hydraulic rotary motor 8 drives the whipstock sub to rotate a specified angle. Then, close the reversing valve 12 to close the rotation oil circuit of the whipstock sub and keep the whipstock sub at the specified working position.

[0028] After closing the rotation oil circuit of the whipstock sub, the electrical signal control board 29 controls the opening of the whipstock anchoring control valve 15. The driving motor 20 drives the hydraulic oil pump 19 to deliver hydraulic oil into the hydraulic oil chamber 1c. The hydraulic oil pushes the whipstock anchor 2 to extend, and anchors the whipstock 1 on the inner wall of the oil well casing, thereby realizing the anchoring of the working position of the whipstock sub, so that the whipstock sub can also maintain its working position under the action of the drilling pressure and the torque of the drill string.

[0029] S4. After the working position of the whipstock sub is anchored, lower the drill string to the hydraulic-driven directional sidetracking wellbore tool. The drill string starts to perform sidetracking operations at the set working position under the action of the whipstock 1.

[0030] S5. When it is necessary to adjust the working position of the whipstock sub, first retract the drill string towards the wellhead to disengage it from the hydraulic-driven directional sidetracking wellbore tool. Release the pressure signal into the oil well at the oil wellhead. After the pressure sensor 30 of the hydraulic-driven directional sidetracking wellbore tool receives the pressure signal in the oil well, it starts to discriminate the pressure signal and convert it into an electrical signal and transmit it to the electrical signal control board 29. The electrical signal control board 29 controls the opening of the whipstock anchoring control valve 15. The driving motor 20 drives the hydraulic oil pump 19 to reverse and pump the hydraulic oil from the hydraulic oil chamber 1c to the oil tank 23. The internal pressure in the hydraulic oil chamber 1c decreases, the whipstock anchor 2 retracts, and the whipstock 1 is released from the anchor. After the whipstock 1 is released from the anchor, the electrical signal control board 29 controls the closing of the whipstock anchoring control valve 15 to keep the whipstock anchor 2 in the retracted state.

[0031] Subsequently, the electric signal control board 29 controls the opening of the reversing valve 12, and the driving motor 20 drives the hydraulic oil pump 19 to deliver hydraulic oil into the hydraulic rotary motor 8, causing the hydraulic rotary motor 8 to drive the inclined short joint to rotate by a specified angle. Subsequently, the reversing valve 12 is closed, and the rotating oil circuit of the inclined short joint is closed to keep the inclined short joint in the specified working position.

[0032] After the rotating oil circuit of the inclined short joint is closed, repeat the anchoring step of the working position of the inclined short joint described in S3 to anchor the inclined short joint in the new working position, and then lower the drill string again.

[0033] S6. When the liquid-driven directional sidetracking wellbore tool needs to be recovered, first recover the drill string to disengage it from the oil well, and then repeat the unanchoring step of the deflecting body 1 described in S5. After the deflecting body 1 is unanchored, lower the special fishing tool.

[0034] S7. After the special fishing tool is anchored to the liquid-driven directional sidetracking wellbore tool, a pressure signal pre-loaded with the unanchoring of the liquid-driven directional sidetracking wellbore tool from the oil well is released into the oil well from the wellhead. After the pressure sensor 30 of the liquid-driven directional sidetracking wellbore tool receives the pressure signal in the oil well, it starts to discriminate the pressure signal, convert it into an electric signal, and transmit it to the electric signal control board 29. The electric signal control board controls the opening of the tool anchoring valve 14, and the driving motor 20 drives the hydraulic oil pump 19 to reverse and pump the hydraulic oil from the oil cavity of the hydraulic anchor 27 to the fuel tank 23, and the hydraulic anchor 27 is unanchored. After the hydraulic anchor 27 is unanchored, the electric signal control board 29 controls the closing of the tool anchoring valve 14, so that the liquid-driven directional sidetracking wellbore tool is unanchored in the oil well. After the liquid-driven directional sidetracking wellbore tool is completely unanchored in the oil well, start to recover the liquid-driven directional sidetracking wellbore tool towards the wellhead.

[0035] The above specific embodiments are used to illustrate this patent rather than limit the scope of this patent. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this patent belong to the protection scope of this patent system.

Claims

1. A liquid-driven directional sidetracking wellbore tool, characterized in that: The working orientation of the drill string is adjusted by the working position of the whipstock sub, so the key to directional sidetracking lies in the control of the working position of the whipstock sub; the internal of the hydraulic-driven directional sidetracking wellbore tool adopts a closed oil circuit to control and adjust the working position of the whipstock sub by hydraulic drive; The whipstock sub includes a whipstock body (1), whipstock body anchor claws (2), a spring (3), an anchor claw pressing strip (4), and a whipstock body oil cavity cover (5). The lower part of the whipstock body (1) is connected to a slewing bearing (6), and the relative rotation between the whipstock sub and the drive sub is realized through the slewing bearing (6); The outer circumference of the whipstock body (1) is evenly provided with 4 anchor claw grooves (1a) and 4 key grooves (1b) in the circumferential direction. The anchor claw grooves (1a) are used to install the spring (3) and the whipstock body anchor claws (2), and the key grooves (1b) are used to install the anchor claw pressing strip (4). A hydraulic oil cavity (1c) is arranged inside the whipstock body (1) to provide an anchoring force for the whipstock body anchor claws (2) through hydraulic oil. The bottom of the whipstock body (1) is provided with an oil cavity cover connection threaded hole (1d), a slewing bearing inner ring connection threaded hole (1e), and a motor connection threaded hole (1f), which are connected to the whipstock body oil cavity cover (5), the inner ring of the slewing bearing (6), and the hydraulic rotary motor (8) respectively through machine screws; The drive sub includes a drive sub housing (7), a hydraulic rotary motor (8), and an oil passing block (9). The upper end of the drive sub housing (7) is connected to the outer ring of the slewing bearing (6), and the lower part of the drive sub housing (7) is connected to the valve group sub; The drive sub housing (7) is provided with a slewing bearing outer ring connection threaded hole (7a), a sealing groove (7b), a motor seat (7c), a motor fixing through hole (7d), and an oil passing block connection through hole (7e). The outer ring of the slewing bearing (6) is connected above the drive sub through the slewing bearing outer ring connection threaded hole (7a) using machine screws. The motor seat (7c) is used to install the hydraulic rotary motor (8), and the hydraulic rotary motor (8) and the drive sub housing (7) are connected through the motor fixing through hole (7d) using machine screws. The oil passing block (9) and the drive sub housing (7) are connected through the oil passing block connection through hole (7e) using machine screws; The valve group sub includes a valve group sub housing (10), a drive-valve group sub oil circuit rotary connection block (11), a directional control valve (12), a directional control valve bracket (13), a tool anchoring control valve (14), a whipstock body anchoring control valve (15), a valve group bracket (16), a flow dividing block (17), a pump bracket (18), a hydraulic oil pump (19), a drive motor (20), a motor bracket (21), and a valve group - oil tank sub oil circuit rotary connection block (22); The lower end of the valve group sub is connected to the upper end of the oil tank sub, the lower end of the oil tank sub is connected to the upper end of the anchoring sub, and the lower end of the anchoring sub is connected to the upper end of the battery sub; The oil tank sub includes an oil tank (23), an oil tank cover (24), and a piston (25). The piston (25) divides the interior of the oil tank (23) into a hydraulic oil cavity and a compressed gas chamber; The anchoring sub includes an anchoring - oil tank sub oil circuit rotary connection block (26) and a hydraulic anchor (27); The battery sub-section includes a battery sub-section housing (28), an electrical signal control board (29), a pressure sensor (30), and a battery (31).

2. The hydraulic-driven directional sidetracking wellbore tool according to claim 1 realizes the anchoring function of the entire tool and the rotation and anchoring functions of the whipstock sub-section through a closed oil circuit inside. The hydraulic oil pump drives hydraulic oil into the oil circuit. After the hydraulic oil passes through the tool anchoring control valve (14) and the whipstock body anchoring control valve (15) to regulate the oil circuit, it enters the hydraulic anchor (27) and the whipstock body (1) respectively. After the hydraulic oil passes through the reversing valve (12) to regulate the oil circuit, it enters the hydraulic rotary motor (8). By switching the working position of the reversing valve (12), the hydraulic rotary motor (8) can rotate clockwise or counterclockwise.

3. The hydraulic-driven directional sidetracking wellbore tool according to claim 2 obtains its power from the battery (31) built in the battery sub-section. The pressure sensor (30) and the electrical signal control board (29) in the battery sub-section decode and translate the pressure signal released from the wellhead, and control the drive motor (20) to drive the hydraulic oil pump (19) and the corresponding oil circuit control valves, so that the hydraulic oil enters the specified components, realizing the anchoring of the entire hydraulic-driven directional sidetracking wellbore tool and the control of the working position of the whipstock sub-section and the anchoring of the working position of the whipstock sub-section.

4. The hydraulic-driven directional sidetracking wellbore tool according to claim 2, the hydraulic rotary motor (8) can drive the whipstock body (1) to rotate 360° clockwise or 360° counterclockwise from the initial position. The rotation direction is determined by the minor arc between the set working position of the whipstock body (1) and its initial position. When the subsequent working position of the whipstock body (1) needs to be adjusted, the rotation direction is determined by the minor arc between the new working position and the working position before adjustment; the included angle of the whipstock body (1) is 6°, and the inclined surface of the whipstock body (1) has a certain radian; the working position of the whipstock sub-section can be regarded as the working position of the whipstock body (1).

5. The hydraulic-driven directional sidetracking wellbore tool according to claim 4 can cooperate with the drill string to drill multiple sidetracks within a circumferential range of 360° at a specified horizontal layer in the oil well.

6. The workflow of a liquid-driven directional sidetracking wellbore tool according to claim 1, characterized in that, The steps are as follows: S1. In the initial state, the whipstock body (1) is located at the initial position, the whipstock body anchor claws (2) are in a contracted state, and the hydraulic-driven directional sidetracking wellbore tool is grasped by the lowering tool. When the hydraulic-driven directional sidetracking wellbore tool is lowered to the specified depth, a pressure signal pre-loaded with anchoring the entire hydraulic-driven directional sidetracking wellbore tool is released from the wellhead into the oil well. After the pressure sensor (30) receives the pressure signal in the oil well, it starts to discriminate the pressure signal and convert it into an electrical signal and transmit it to the electrical signal control board (29). The electrical signal control board (29) controls the opening of the tool anchoring control valve (14), and the drive motor (20) drives the hydraulic oil pump (19) to transport the hydraulic oil into the hydraulic anchor, completing the anchoring of the entire hydraulic-driven directional sidetracking wellbore tool in the oil well casing; S2. After the hydraulic-driven directional sidetracking wellbore tool is fully anchored, the tool anchoring control valve (14) is closed, thus locking the anchoring oil circuit of the hydraulic-driven directional sidetracking wellbore tool and keeping the hydraulic-driven directional sidetracking wellbore tool in the anchored state; lower the tool and recover it upward to leave the hydraulic-driven directional sidetracking wellbore tool at the designated position in the oil well; S3. When the hydraulic-driven directional sidetracking wellbore tool is working, the working position of the deflecting body (1) needs to be adjusted. A pressure signal pre-loaded with the working position of the deflecting body (1) is released into the oil well from the wellhead. After the pressure sensor (30) of the hydraulic-driven directional sidetracking wellbore tool receives the pressure signal in the oil well, it starts to discriminate the pressure signal, converts it into an electrical signal and transmits it to the electrical signal control board (29). The electrical signal control board (29) controls the opening of the reversing valve (12), and the driving motor (20) drives the hydraulic oil pump (19) to deliver hydraulic oil into the hydraulic rotary motor (8), so that the hydraulic rotary motor (8) drives the deflecting sub to rotate a specified angle. Then the reversing valve (12) is closed to close the rotating oil circuit of the deflecting sub and keep the deflecting sub at the designated working position; After the closing of the rotating oil circuit of the deflecting sub is completed, the electrical signal control board (29) controls the opening of the deflecting body anchoring control valve (15). The driving motor (20) drives the hydraulic oil pump (19) to deliver hydraulic oil into the hydraulic oil chamber (1c). The hydraulic oil pushes the deflecting body anchor claws (2) to extend, and anchors the deflecting body (1) on the inner wall of the oil well casing, thus realizing the anchoring of the working position of the deflecting sub and enabling the deflecting sub to maintain its working position under the action of the drilling pressure and the torque of the drill string; S4. After the working position of the deflecting sub is anchored, lower the drill string to the hydraulic-driven directional sidetracking wellbore tool. The drill string starts to perform sidetracking well operation at the set working position under the action of the deflecting body (1); S5. When it is necessary to adjust the working position of the deflecting sub, first recover the drill string towards the wellhead to disengage it from the hydraulic-driven directional sidetracking wellbore tool. Release a pressure signal into the oil well at the oil wellhead. After the pressure sensor (30) of the hydraulic-driven directional sidetracking wellbore tool receives the pressure signal in the oil well, it starts to discriminate the pressure signal and convert it into an electrical signal and transmit it to the electrical signal control board (29). The electrical signal control board (29) controls the opening of the deflecting body anchoring control valve (15). The driving motor (20) drives the hydraulic oil pump (19) to reverse and pump the hydraulic oil from the hydraulic oil chamber (1c) to the oil tank (23). The internal pressure of the hydraulic oil chamber (1c) decreases, the deflecting body anchor claws (2) retract, and the deflecting body (1) is de-anchored. After the deflecting body (1) is de-anchored, the electrical signal control board (29) controls the closing of the deflecting body anchoring control valve (15) to keep the deflecting body anchor claws (2) in the retracted state; Subsequently, the electrical signal control board (29) controls the opening of the reversing valve (12). The driving motor (20) drives the hydraulic oil pump (19) to deliver hydraulic oil into the hydraulic rotary motor (8), so that the hydraulic rotary motor (8) drives the deflecting sub to rotate a specified angle. Then the reversing valve (12) is closed to close the rotating oil circuit of the deflecting sub and keep the deflecting sub at the designated working position; After completing the closing of the rotating oil circuit of the whipstock sub, repeat the anchoring steps of the working position of the whipstock sub described in S3 to anchor the whipstock sub in the new working position, and then lower the drill string again; S6. When it is necessary to recover the hydraulic-driven directional sidetracking wellbore tool, first recover the drill string to disengage it from the oil well, and then repeat the unanchoring steps of the whipstock body (1) described in S5. After the whipstock body (1) is unanchored, lower the fishing spear; S7. After the fishing spear is anchored to the hydraulic-driven directional sidetracking wellbore tool, a pressure signal pre-loaded with the unanchoring of the hydraulic-driven directional sidetracking wellbore tool from the oil well is released into the oil well from the wellhead. After the pressure sensor (30) of the hydraulic-driven directional sidetracking wellbore tool receives the pressure signal in the oil well, it starts to discriminate the pressure signal, convert it into an electrical signal and transmit it to the electrical signal control board (29). The electrical signal control board controls the opening of the tool anchoring valve (14), and the drive motor (20) drives the hydraulic oil pump (19) to reverse and pump the hydraulic oil from the oil cavity of the hydraulic anchor (27) to the fuel tank (23). The hydraulic anchor (27) is unanchored. After the hydraulic anchor (27) is unanchored, the electrical signal control board (29) controls the closing of the tool anchoring valve (14), so that the hydraulic-driven directional sidetracking wellbore tool is unanchored in the oil well. After the hydraulic-driven directional sidetracking wellbore tool is completely unanchored in the oil well, start to recover the hydraulic-driven directional sidetracking wellbore tool towards the wellhead.

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