CN115898291A - Fluid supercharging device and fluid pulse rotary steering drilling tool - Google Patents

Abstract

The invention discloses a liquid supercharging device, which comprises a first power device connected with a drill rod and a drill collar, a second power device arranged in a manner of rotating synchronously with a drill bit and a regulating device connected between the first power device and the second power device; the first power device is a turbine; the second power unit includes: the high-pressure cavity is communicated to a high-pressure hole of the drill bit and a high-pressure nozzle through a valve port of the electromagnetic valve; the invention also provides a fluid pulse rotary guide drilling tool, the valve port of the electromagnetic valve and the high-pressure hole are mutually corresponding and fixed and synchronously rotate, the sealing stability is ensured, the pressure of the injected drilling fluid is ensured, the reliability of directional rock breaking is improved, the designed double-layer high-pressure cavity is combined with the up-and-down movement of the piston, the injection pressure is ensured to a great extent, and the fluid pulse rotary guide drilling tool is simple and compact in integral structure, has higher reliability and longer service life.

Description

Fluid booster device and fluid pulse rotary steerable drilling tool

technical field

The patent of the present invention relates to a rotary steerable drilling device in the field of petroleum drilling engineering, especially a fluid booster device for pressurizing drilling fluid used in hydraulic rock-breaking directional drilling. The invention also provides a fluid booster device The fluid pulse rotates the steerable drilling tool.

Background technique

The rotary steerable drilling system is an important drilling tool for complex structure wells such as horizontal wells, directional wells, and extended-reach wells. The rotary steerable drilling system reduces the underpressure phenomenon by rotating the casing or most of the casing, and the very short part does not rotate, so as to realize the construction of deeper and longer horizontal wells and directional wells. In recent years, the rotary steerable drilling system has gradually become a popular steerable drilling technology and one of the key technologies for efficient drilling. The principle of the steering of the rotary steerable drilling system is to break the rock unevenly in different directions under control, so that the amount of rock breaking in a specific direction is greater than that in other directions.

At present, the rock-breaking method of rotary steerable drilling system is mechanical rock-breaking method or hydraulic rock-breaking method. The mechanical rock-breaking method mainly depends on the side cutting ability of the drill bit and the guiding lateral force, but the bias mechanism that generates the lateral force is subject to vibration, Unfavorable factors such as impact and rotation are prone to failure, which in turn affects the steering effect and life of the entire rotary steerable drilling system. However, the existing hydraulic guiding rock breaking methods often have the problem of poor sealing, which seriously affects the service life and reliability.

Based on this, how to solve the problem of reducing the reliability and service life of the offset mechanism of the rotary steerable drilling system due to the mechanical rock breaking method, and the steering drilling device that avoids the problem of rotary dynamic sealing under the condition of high-pressure hydraulic rock breaking, is currently a problem for those skilled in the art. Technical issues that need to be resolved.

Contents of the invention

The purpose of the present invention is to provide a fluid booster device for power boosting of drilling fluid during drilling, which not only solves the problem of poor sealing performance of traditional high-pressure hydraulic rock breaking, but also improves the reliability of directional rock breaking. The invention also provides a fluid pulse rotary steerable drilling tool with the fluid booster device, through the cooperation of the fluid booster device and the steering drill tool, directional rock breaking is realized, and the directional drilling speed is greatly improved.

In order to achieve the above object, the present invention provides a fluid booster, comprising a first power unit connected to the drill collar, a second power unit that is rotated synchronously with the drill bit and connected between the first power unit and the second power unit. between the control device;

the first power plant is a turbine;

The second power unit includes: a high-pressure pump, a high-pressure chamber positioned at the lower end of the high-pressure pump and a solenoid valve positioned at the bottom of the high-pressure chamber. The high-pressure chamber communicates with the high-pressure hole and the high-pressure nozzle of the drill bit through the valve port of the solenoid valve.

Further, the high-pressure pump and the high-pressure chamber run through a central wire-passing rod connected to the solenoid valve, and a wire connected to the solenoid valve passes through the central wire-passing rod.

Further, the high-pressure pump is provided with a casing, and the casing is provided with a liquid inlet, and the bottom end of the high-pressure pump relative to the inner side of the casing is provided with a pump end bearing, and the bottom end of the high-pressure pump relative to the outer side of the casing is provided with a lower centralizer.

Further, the cavity radius of the high-pressure chamber is smaller than the radius of the high-pressure pump, and the upper and lower ends of the central wire-passing rod in the high-pressure chamber are provided with wire-passing rod centralizers.

Further, the high-pressure chamber is a double-layer pipe structure, the inner chamber of the inner pipe contains the pressurized drilling fluid and the central line passing rod, the outer chamber of the outer pipe is a low-pressure chamber, which holds the non-pressurized drilling fluid, and the inner pipe and the outer pipe A buffer cavity is formed between them, and a piston with an elastic structure is arranged in the buffer cavity.

Further, the buffer chamber communicates with the low-pressure chamber through the breathing port provided on the upper outer chamber wall, the bottom side of the piston communicates with the high-pressure chamber, and the elastic structure is a spring.

Further, the solenoid valve is fixed on the drill bit through the valve seat, and the valve port of the solenoid valve corresponds to the high pressure hole of the drill bit.

Further, there are at least two solenoid valves, and the valve ports of the at least two solenoid valves correspond to at least two high-pressure holes of the drill bit.

Further, the control device includes a generator connected in sequence to the upper turbine, a circuit protection cylinder with a measurement and control circuit board and an attitude sensor inside, and a downhole motor. The downhole motor is connected to the high-pressure pump of the second power unit through a cardan shaft.

Further, the patent of the present invention also provides a fluid pulse rotary steerable drilling tool, which includes the above liquid booster device, an outer cylinder sleeved on the outer periphery of the liquid booster device, and a drill collar connected to the upper end of the outer tube 1. The drill bit connected to the lower end of the outer cylinder, part of the drilling fluid in the inner cavity of the outer cylinder flows out through the low-pressure water hole of the drill bit, and the other part of the drilling fluid is pressurized by the liquid booster device and sprayed out through the high-pressure hole and high-pressure nozzle of the drill bit.

Further, the turbine in the liquid booster device is connected to the drill collar through the upper central cylinder.

Further, the upper central cylinder is centered relative to the outer cylinder through the upper centralizer.

Further, under the power of the drill collar, the outer cylinder, the first power device, the second power device and the drill bit rotate synchronously.

Adopting the liquid pressurization device of the present invention, because it is designed to rotate synchronously with the drill bit, the problem of poor sealing caused by relative rotation is avoided. The valve port of the solenoid valve and the high-pressure hole are set to correspond to each other and are fixed to ensure the stability of the seal. Reliability ensures the pressure of jet drilling fluid and improves the reliability of directional rock breaking. The designed double-layer high-pressure chamber, combined with the up and down movement of the piston, ensures the jet pressure to a large extent and will not be too high or too low. The reliability of directional rock breaking is further enhanced. The present invention also provides a fluid pulse rotary steerable drilling tool with the fluid booster device. Through the cooperation of the fluid booster device and the steering drill tool, directional rock breaking is realized, which greatly improves the directional Drilling speed. The technical solution of the present invention does not require an additional mechanical bias mechanism, avoids high-pressure dynamic tightness, has a simple and compact overall structure, and has higher reliability and longer service life.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is a structural schematic diagram of the application of the liquid booster device provided by the embodiment of the present invention on the fluid pulse rotary steerable drilling tool;

Fig. 2 is an enlarged view of part A in Fig. 1 .

Among them: 1. Outer cylinder, 2. Upper central cylinder, 3. Upper centralizer, 4. Turbine, 5. Generator, 6. Measurement and control circuit board, 7. Circuit protection cylinder, 8. Attitude sensor, 9. Downhole motor, 10. Cardan shaft, 11. High pressure pump, 12. Shell, 13. Bearing at the pump end, 14. Center line passing rod, 15. Lead wire, 16. Line passing rod centralizer, 17. High pressure chamber, 18. Spring, 19 , breathing port, 20, piston, 21, solenoid valve, 22, valve seat, 23, high pressure hole, 24, drill bit, 25, high pressure nozzle, 26, low pressure water eye, 27, liquid inlet.

Detailed ways

The core of the present invention is to provide a liquid booster device and the application of the liquid booster device on the fluid pulse rotary steerable drilling tool. The reliability of directional rock breaking ensures the drilling speed.

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Embodiment one

Please refer to Fig. 1 to Fig. 2, a kind of liquid supercharging device disclosed in this embodiment includes a first power device connected with the drill collar of the drill pipe, a second power device which is set to rotate synchronously with the drill The regulating device between the device and the second power unit; the first power unit is a turbine 4; the second power unit includes: a high-pressure pump 11, a high-pressure chamber 17 positioned at the lower end of the high-pressure pump 11 and a solenoid valve 21 positioned at the bottom end of the high-pressure chamber 17, The high-pressure chamber 17 communicates with the high-pressure hole 23 and the high-pressure nozzle 25 of the drill bit 24 through the valve port of the solenoid valve 21 . When the power is turned on, the high-pressure pump 11 works, pressurizes the drilling fluid entering the high-pressure pump 11 and transports it to the high-pressure chamber 17, and then the high-pressure drilling fluid enters the drill bit 24 through the valve port of the solenoid valve 21 at the bottom of the high-pressure chamber 17 In the high-pressure hole 23 in the middle, it is finally sprayed out through the high-pressure nozzle 25 to form a directional jet of high-pressure drilling fluid. The turbine 4 of the first power unit rotates under the power of the drilling fluid flow, driving the control device to work, and the control device fine-tunes the attitude and speed of the second power unit. As shown in the accompanying drawing 1, the high pressure pump 11 is provided with a housing 12, the upper end of the high pressure pump 11 is the drilling fluid introduction cavity, the housing 12 is provided with a liquid inlet 27, under the power of the high pressure pump 11, the housing 12 The external drilling fluid enters the drilling fluid introduction chamber through the liquid inlet 27, and then flows into the high-pressure chamber 17 after being pressurized by the high-pressure pump 11. In order to ensure the stability of the position of the high-pressure pump 11 and the stability of the rotating power, the high-pressure pump 11 is provided with a pump end bearing 13 at the bottom end relative to the inner side of the casing 12, and the high pressure pump 13 presses against the variable diameter step of the casing 12 through the pump end bearing 13, thereby achieving stable position and stable rotation. Moreover, in order to further ensure the high pressure pump 11 and The position stability of the casing 12 prevents it from shaking in the radial direction. The bottom end of the high-pressure pump 11 relative to the outside of the casing 12 is provided with a lower centralizer to ensure the central position of the high-pressure pump 11 in working state and the downhole motor 9 connected thereto. positional stability.

In this embodiment, if the valve port of the solenoid valve 21 is opened or closed by the controller in the energized state, it is necessary to design the control and power lines to be connected to the solenoid valve 21. Here, the design scheme of the present embodiment is: high pressure pump 11 and The high-pressure chamber 17 is designed with a central wire-passing rod 14 connected to the solenoid valve 21. The central wire-passing rod 14 is pierced with a wire 15 connected to the solenoid valve 21. The design of the central wire-passing rod 14 does not affect the high pressure. The work of the pump 11 does not hinder the flow of high-pressure drilling fluid in the high-pressure chamber 17, and at the same time provides a channel for the wire 15 to ensure safe and stable transmission of the wire 15. As shown in Figure 1, the bottom end of the high-pressure chamber 17 and the drill bit 24 are in the form of a plug-in connection. The inner side of the plug-in contact is where the solenoid valve 21 is located, and the outside of the plug-in is a low-pressure chamber. The drilling fluid in the low-pressure chamber passes through The low-pressure water eye 26 flows out. Since the solenoid valve 21 is located at the joint between the high-pressure chamber 17 and the drill bit 24, the sealing performance of the solenoid valve 21 is particularly important. In this embodiment, in order to ensure the sealing effect of the solenoid valve 21 relative to the drill bit 24 , the solenoid valve 21 is fixed on the drill bit 24 through the valve seat 22, and the valve port of the solenoid valve 21 corresponds to the high-pressure hole 23 of the drill bit 24, and the solenoid valve 21 and the drill bit 24 rotate synchronously. According to the requirements of directional injection, the solenoid valve 21 can be Set as one, then the directional high-pressure nozzle 25 is also one, and the two correspond to realize a fixed position of the drill bit 24 to spray high-pressure drilling fluid. Of course, the number of solenoid valves 21 can also be at least two, and the number of at least two solenoid valves 21 The valve port corresponds to the high-pressure hole 23 of the drill bit 24 one by one, and the high-pressure hole 23 of the drill bit 24 is also two. The solenoid valve 21 valve port corresponds to the high-pressure hole 23 and rotates synchronously. There are three solenoid valves 21, and there are three corresponding high-pressure holes 23.

During work, the high-pressure chamber 17 is the same as the high-pressure pump 11 and the solenoid valve 21. With the synchronous rotation of the drill bit 24, the attitude sensor 8 in the control device performs real-time dynamic calculation to obtain the attitude of the drilling tool through an advanced strapdown algorithm. The valve 21 is fixedly connected with three high-pressure nozzles 25 and rotates at the same time. Using the geodetic coordinate reference, the solenoid valve 21 is opened and closed at a fixed formation position and angle, that is, through the control logic, the solenoid valve 21 is controlled to open at a fixed time. and closed, the position and angle of communication between the high-pressure chamber 17 and the high-pressure nozzle 25 are fixed, thereby realizing directional injection of high-pressure drilling fluid, and the solenoid valve 21 is fixedly connected with the high-pressure nozzle 25 without relative rotation, that is, a stable seal is realized.

Regarding the high-pressure chamber 17 involved in this embodiment, the cavity radius of the high-pressure chamber 17 is smaller than the radius of the high-pressure pump 11, and the upper and lower ends of the central wire-passing rod 14 in the high-pressure chamber 17 are provided with wire-passing rod centralizers 16 to prevent the high-pressure chamber 17 from When dynamic high-frequency high-pressure drilling fluid is injected, it will affect the center line passing rod 14, causing it to shake, thereby affecting the performance stability of other components. The high-pressure chamber 17 in this embodiment is a double-layer tube structure, and the inner tube The cavity accommodates the pressurized drilling fluid and the central line passing rod 14, the outer cavity of the outer tube is a low-pressure cavity, which accommodates non-pressurized drilling fluid, and a buffer cavity is formed between the inner tube and the outer tube. The piston 20 of elastic structure. And the buffer chamber communicates with the low-pressure chamber through the breathing port 19 provided on the upper outer chamber wall, the bottom side of the piston communicates with the high-pressure chamber, and the elastic structure is a spring 18 . When the solenoid valve 21 is in the closed state, the high-pressure drilling fluid pushes the piston 20 to compress the spring 18, accumulates energy, and waits for the next solenoid valve 21 to be opened. Next, it is discharged into the low-pressure chamber through the breathing port 19. Subsequently, at a certain node after the high-pressure pump 11 continuously provides high-pressure drilling fluid, the solenoid valve 21 is opened at a fixed moment, and the high-pressure drilling fluid is injected instantaneously. After the pressure is released, the piston 20 moves downward under the action of the spring 18 , the drilling fluid in the low-pressure chamber enters the buffer chamber through the breathing port to balance the pressure on the upper and lower sides of the piston 20, that is, when the solenoid valve is closed, the high-pressure drilling fluid stores energy through the piston 20, the piston 20 moves upward, and the drilling fluid in the buffer chamber The liquid is discharged through the breathing port 19 to prevent the upward movement of the piston 20 from being blocked. When the solenoid valve 20 is opened, a large amount of high-pressure drilling fluid reaches the high-pressure nozzle 25 through the solenoid valve 20 in a short period of time, the piston 20 moves downward, and the drilling fluid in the low-pressure chamber enters through the breathing port 19 Buffer cavity, balance pressure. Thereby ensuring that the injection pressure is stable and reliable.

In addition, regarding the regulating device in this embodiment, it is used to regulate the positions and operating states of the turbine 4, the high-pressure pump 11, and the high-pressure chamber 17. 6 and the circuit protection tube 7 of the attitude sensor 8 and the downhole motor 9, the circuit protection tube 7 is used to protect the measurement and control circuit board 6 and the attitude sensor 8 from environmental interference in drilling conditions, and the downhole motor 9 is connected to the On the high-pressure pump 11 of the second power plant. The generator 5 is installed on the turbine 4, and the turbine 4 drives the rotor of the generator 5 to generate power to provide power for the measurement and control circuit board 6 and the attitude sensor 8. The measurement and control circuit board 6 is installed in the circuit protection tube 7 to provide power for the entire generator 5, underground The motor 9 and the like provide control signals, and the attitude sensor 8 is used to measure the attitude, orientation and motion state of the upper central cylinder 2 and the turbine 4 .

Embodiment two

This embodiment provides a fluid pulse rotary steerable drill on the basis of the first embodiment. The liquid booster device in the first embodiment is arranged inside the steerable drill. Regarding the specific structure and booster of the liquid booster device, For the technical solution of the pressure principle, please refer to the specific description of the first embodiment. This embodiment will not repeat it. The purpose of this embodiment is how to apply the liquid booster device to provide a stable, reliable, and well-tight fluid pulse rotary guide. Drilling tool, this guide drilling tool not only includes the liquid pressurization device in the first embodiment, but also includes an outer cylinder 1 sleeved on the outer periphery of the liquid pressurization device, a drill collar connected to the upper end of the outer cylinder 1, and a drill bit connected to the lower end of the outer cylinder 1 24. Part of the drilling fluid in the inner cavity of the outer cylinder 1 flows out through the low-pressure water hole 26 of the drill bit 24, and the other part of the drilling fluid is pressurized by the liquid booster device and sprayed out through the high-pressure hole 23 and the high-pressure nozzle 25 of the drill bit 24. During specific work, the liquid pressurization device placed inside the outer cylinder 1 pressurizes the drilling fluid flowing from the low-pressure chamber into the cavity of the high-pressure pump 11 through the liquid inlet 27, enters the high-pressure chamber 17, and then passes through the intermittently opened electromagnetic valve. 21 is discharged into the high-pressure hole 23 of the drill bit 24, and then ejected through the high-pressure nozzle 25 to complete intermittent and equal-position injection of high-pressure drilling fluid.

In this embodiment, the turbine 4 in the liquid supercharging device is connected to the drill collar through the upper central cylinder 2, and the outer cylinder 1, the drill bit 24, and the liquid supercharging device rotate synchronously without relative rotation. Under the power of the drill collar, the outer cylinder 1 , the first power unit, the second power unit, and the drill bit 24 rotate synchronously. The upper central cylinder 2 is centered relative to the outer cylinder 1 through the upper centralizer 3, which ensures the stability of its central position and prevents its radial movement. In this embodiment, there is no valve seat 22, solenoid valve 21 and drill bit 24. Relatively rotating, there is no problem of poor sealing or failure. At least one solenoid valve is provided on the valve seat 22, and of course two, three or other numbers can be provided. This embodiment will not be described one by one. , preferably three electromagnetic valves 21 (not limited to three) are installed on the valve seat 22, and each electromagnetic valve 21 corresponds to a high-pressure hole 23 and a high-pressure nozzle 25 of the drill bit 24. The monitoring and control of the sensor 8 controls and measures the opening time and duration of the solenoid valve 21. Since the solenoid valve 21 and the drill bit 24 rotate synchronously, the opening time and duration of the solenoid valve 21 can directly reflect the position of the high-pressure nozzle 25 and the rock breaking The time and injection position represent the steering direction, and the injection duration represents the steering ability; each time the drill bit 24 rotates to a fixed position, high-pressure drilling fluid is injected to form directional hydraulic rock-breaking guidance.

Finally, it should also be noted that in this text, relational terms such as first and second etc. are only used to distinguish one entity or operation from another, and do not necessarily require or imply that these entities or operations, any such actual relationship or order exists. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for the related information, please refer to the description of the method part.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (13)

1. A liquid supercharging device which characterized in that: the device comprises a first power device connected with a drill rod and a drill collar, a second power device synchronously and rotationally arranged with a drill bit (24) and a regulating and controlling device connected between the first power device and the second power device;

the first power device is a turbine (4);

the second power unit includes: the high-pressure jet drill comprises a high-pressure pump (11), a high-pressure cavity (17) located at the lower end of the high-pressure pump (11) and an electromagnetic valve (21) located at the bottom end of the high-pressure cavity (17), wherein the high-pressure cavity (17) is communicated to a high-pressure hole (23) of a drill bit (24) and a high-pressure nozzle (25) through a valve port of the electromagnetic valve (21).

2. The liquid supercharging device according to claim 1, characterized in that a central line-guiding rod (14) connected to the solenoid valve (21) extends through the high-pressure pump (11) and the high-pressure chamber (17), and a lead (15) connected to the solenoid valve (21) extends through the central line-guiding rod (14).

3. The liquid charging apparatus according to claim 1 or 2, characterized in that a housing (12) is provided outside the high-pressure pump (11), a liquid inlet (27) is provided on the housing (12), and a pump end bearing (13) is provided at a bottom end of the high-pressure pump (11) opposite to an inner side of the housing (12), and a lower centralizer is provided at a bottom end of the high-pressure pump (11) opposite to an outer side of the housing (12).

4. The liquid supercharging device according to claim 2, characterized in that the cavity radius of the high-pressure cavity (17) is smaller than the radius of the high-pressure pump (11), and the upper and lower ends of the central wire rod (14) in the high-pressure cavity (17) are provided with wire rod centralizers (16).

5. The fluid pressurization device according to claim 2, wherein the high pressure chamber (17) is a double-layer tube structure, the inner cavity of the inner layer tube contains pressurized drilling fluid and a central wire passing rod (14), the outer cavity of the outer layer tube is a low pressure chamber and contains non-pressurized drilling fluid, a buffer chamber is formed between the inner layer tube and the outer layer tube, and a piston (20) with an elastic structure is arranged in the buffer chamber.

6. A liquid pressurisation device according to claim 5, characterised in that the buffer chamber communicates with the low pressure chamber via a breathing port (19) provided in the outer chamber wall on the upper side thereof, the piston communicates with the high pressure chamber on the bottom side thereof, and the resilient structure is a spring (18).

7. A liquid pressurizing device according to claim 1, wherein the solenoid valve (21) is fixed to the drill (24) by a valve seat (22), and a valve port of the solenoid valve (21) corresponds to the high-pressure hole (23) of the drill (24).

8. The fluid pressure boost device according to claim 7, characterized in that, the number of the solenoid valves (21) is at least two, and the valve ports of at least two solenoid valves (21) correspond to the high pressure holes (23) of the drill bit (24) one by one.

9. The liquid supercharging device according to claim 1, characterized in that the regulation and control device comprises a generator (5) connected in sequence with the upper turbine (4), a circuit protection cylinder (7) in which a measurement and control circuit board (6) and an attitude sensor (8) are arranged, and a downhole motor (9), wherein the downhole motor (9) is connected to a high-pressure pump (11) of a second power unit through a cardan shaft (10).

10. The fluid pulse rotary steering drilling tool is characterized by comprising the fluid pressurizing device as claimed in any one of claims 1 to 9, and further comprising an outer cylinder (1) sleeved on the periphery of the fluid pressurizing device, a drill collar connected to the upper end of the outer cylinder (1), and a drill bit (24) connected to the lower end of the outer cylinder (1), wherein one part of drilling fluid in the inner cavity of the outer cylinder (1) flows out through a low-pressure water hole (26) of the drill bit (24), and the other part of drilling fluid is pressurized by the fluid pressurizing device and then is sprayed out through a high-pressure hole (23) and a high-pressure nozzle (25) of the drill bit (24).

11. A fluid pulse rotary steerable drilling tool according to claim 10, wherein: the turbine (4) in the liquid supercharging device is connected to the drill collar through the upper central cylinder (2).

12. A fluid pulse rotary steerable drilling tool according to claim 10, wherein: the upper central cylinder (2) is arranged in the middle relative to the outer cylinder (1) through an upper centralizer (3).

13. A fluid pulse rotary steerable drilling tool according to claim 10, wherein: under the power of the drill collar, the outer cylinder (1), the first power device, the second power device and the drill bit (24) synchronously rotate.

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