Combined type drill rod automatic deviation rectifying and guiding device and method for kilometer directional drilling

Abstract

The invention relates to the technical field of drilling, in particular to a combined type drill rod automatic deviation rectifying and guiding device and method for kilometer directional drilling, the device comprises a shell, a driving shaft, a sensor assembly, an MCU controller assembly and an eccentric assembly, and the eccentric assembly comprises a driving ring, a sliding block, a spring, a sleeve, a transfer cavity, an electromagnetic three-way valve, a one-way valve, an electromagnetic valve and a flow meter. By arranging the driving ring, the sliding block, the electromagnetic valve, the flow meter and other structures, an electric drive system is not needed, eccentric operation of the driving shaft can be achieved only by means of the drilling fluid pressure of the driving shaft, consumption of electric energy is reduced, and more lasting guiding work is achieved; the annular piston is additionally arranged in the transfer cavity, and the magnetorheological fluid is arranged to serve as a hydraulic medium, so that the failure rate of the guide device is reduced.

Description

Technical Field

[0001] The present invention relates to the field of drilling technology, in particular to a composite drill rod automatic deviation correction and guidance device and method for kilometer-long directional drilling. Background Art

[0002] In coal mining, kilometer directional drilling technology is needed for gas extraction, geological structure exploration and coal seam occurrence detection, underground emergency rescue channel construction, coalbed methane development and comprehensive utilization. For example, in gas extraction, kilometer directional drilling is used to pre-extract coal seam gas over a long distance. The drilling can cover multiple mining working faces, and the extraction efficiency is increased by more than 30% compared with traditional drilling. The kilometer directional drill constructs directional holes along the direction or inclination of the coal seam, continuously collects coal seam thickness and inclination data, and optimizes the mining process design. In geological structure exploration and coal seam occurrence detection, in coalbed methane development and comprehensive utilization, the kilometer directional drill is combined with horizontal well technology to achieve coal The large-scale mining of layer gas has promoted the transformation of coal mines to clean energy. Early rotary directional tools used side-thrust drill bits to apply external force to the drill bit, forcing the drill bit to deviate from the axis of the drill tool to achieve the ability to create inclination. Some also used retractable ribs to push against the well wall, and used the friction between the ribs and the well wall to achieve the ability to create inclination, thereby achieving the effect of directional drilling. At present, the guidance method mainly uses the measurement while drilling (MWD) system, which uses the gyroscope guidance method. Through gyroscopes, accelerometers, and magnetometers, real-time trajectory data is displayed on the ground receiving equipment, and the deviation curve is generated by comparison with the designed trajectory, and correction is performed according to the deviation.

[0003] At present, the Geo-Pilot rotary steerable drilling system, jointly developed by the American company Spearison and the Japan National Petroleum Corporation, has a core technology that uses an eccentric device consisting of two eccentric rings. The eccentric device is used to bend the drive shaft, and then the central bearing is used to form a support point, so that the drill bit points in the opposite direction of the shaft bending, generating a deflection capability. However, the eccentric ring device requires an additional electric drive system to adjust the eccentric ring, which requires additional power. During guidance, the electric drive system needs to continuously apply torque to overcome the thrust on the drill bit, so the energy consumption is high, and the lithium battery is not enough. When the rated power remains unchanged, the continuous working time of the system will be shortened. At the same time, as the mining depth increases and the mining distance becomes longer, the underground geological conditions become more complex and problems are more likely to occur. When drilling into a fault fracture zone, the drill bit will be subjected to a large external force, which can easily cause damage to the electric drive system. Therefore, when encountering a fault fracture zone, the failure rate of the system will increase. For this reason, the applicant has proposed a composite drill pipe automatic correction and guidance device and method for kilometer-long directional drilling that can use its own high-pressure water flow to drive an eccentric device, thereby saving electricity and reducing the failure rate when encountering a fault fracture zone. Summary of the Invention

[0004] The purpose of the present invention is to provide a composite drill pipe automatic deviation correction and guidance device for kilometer-long directional drilling to solve the problems raised in the background art. The specific technical solution is as follows: The first object of the present invention is to provide a composite drill pipe automatic deviation correction guide device for kilometer-long directional drilling, comprising a housing, a drive shaft, a sensor assembly, an MCU controller assembly, an eccentric assembly, a centering bearing, and a sealing kit. A drilling fluid main flow channel is provided in the drive shaft, the drive shaft is installed in the eccentric assembly, and the drive shaft rotates through the centering bearing. The sensor assembly and the MCU controller assembly are both provided on the inner wall of the housing, and the two sealing kits are respectively provided at both ends of the housing; the eccentric assembly comprises a drive ring, a slider, a sleeve, a transfer cavity, an electromagnetic three-way valve, a one-way valve, an electromagnetic valve, and a flow meter. A plurality of hydraulic grooves are provided on the periphery of the drive ring, and the slider is slidably connected to the hydraulic grooves. A sliding sealing ring is provided between the slider and the hydraulic groove. The hydraulic groove is connected to the transfer cavity on both sides through two first high-pressure hoses respectively. The first high-pressure hose is provided with an electromagnetic valve and a flow meter. The ends of multiple sliders are jointly supported on the outer shell. The inner ring of the drive ring is connected to the drive shaft through a bearing. The transfer cavity is connected to the sleeve through a second high-pressure hose. The second high-pressure hose is provided with an electromagnetic three-way valve. The one-way valve is provided on the outer shell. The one-way valve is provided on the outer shell. The one-way valve is used to discharge the fluid to the outside of the outer shell. The sleeve is rotatably sleeved on the drive shaft. A through hole is opened on the drive shaft. The through hole is located in the sleeve. The through hole is used to connect the internal space of the sleeve with the main flow channel of the drilling fluid.

[0005] Preferably, the slider is installed in the hydraulic tank via a spring, and the spring is used to support the slider to reduce the required liquid inlet pressure.

[0006] Preferably, an annular piston is provided in the transfer chamber, which divides the transfer chamber into two independent parts, one part is connected to the hydraulic tank, and the other part is connected to the sleeve. The part connected to the hydraulic tank is filled with bubble-free hydraulic medium, and the part connected to the sleeve is drilling fluid.

[0007] Preferably, the hydraulic medium is magnetorheological fluid, and an electromagnetic coil is provided on the drive ring.

[0008] Preferably, the drive ring is made of magnetic shielding material.

[0009] Preferably, a rotating sealing ring is provided at the connection between the sleeve and the drive shaft.

[0010] Preferably, the MCU controller component has a built-in lithium battery.

[0011] Preferably, the sealing kit is a high-elastic air rubber sealing ring.

[0012] Preferably, the outer shell is provided with retractable ribs.

[0013] A second object of the present invention is to provide a composite drill pipe automatic deviation correction and guidance method for kilometer-long directional drilling, characterized in that the method comprises the following steps: S1: Continuously monitor the current posture and working condition of the drill pipe through the sensor component, and transmit the data to the MCU controller component in real time; S2: The MCU controller component compares the preset target trajectory with the posture and working condition information monitored by the sensor component to determine the required eccentricity direction and amount, and then calculates the liquid inflow to each hydraulic groove on each drive ring; S3: Using the pressure of the drilling fluid main channel in the drive shaft as the power source, the through hole on the drive shaft connects the drilling fluid main channel with the interior of the sleeve to maintain the drilling fluid pressure in the sleeve. The MCU controller component controls the electromagnetic three-way valve corresponding to the target direction to open, and the drilling fluid enters the drilling fluid side of the transfer chamber, pushing the annular piston to squeeze the hydraulic medium on the other side; S4: The MCU controller assembly opens the solenoid valve corresponding to the hydraulic tank on the side that needs to be inlet. The hydraulic medium enters the hydraulic tank through the first high-pressure hose, pushing the slider outward. The end of the slider presses against the housing, generating a deflection force. The flow meter monitors the inflow in real time. When the calculated value is reached, the MCU controller assembly controls the solenoid valve to close to ensure the accurate extension of the slider. The solenoid valve on the side of the hydraulic tank that needs to be drained is opened. Under the action of external pressure, the hydraulic medium in the hydraulic tank flows into the transfer cavity on the other side through the first high-pressure hose and is discharged to the outside of the housing through the third passage of the electromagnetic three-way valve and the one-way valve. S5: Through the differential expansion and contraction of the slider, the drive ring produces eccentricity in a preset direction inside the housing, and then drives the drive shaft to eccentricity synchronously through the bearing. At the same time, the drive shaft maintains stable rotation under the constraint of the center bearing, realizing the guidance and correction of the drill bit to the target direction.

[0014] Preferably, magnetorheological fluid is used as the hydraulic medium. When the sensor detects severe vibration or enters the fault fracture zone, the MCU controller component controls the electromagnetic coil on the drive ring to be energized. Beneficial effects

[0015] By setting up structures such as a drive ring, a slider, a solenoid valve, and a flow meter, the eccentric operation of the drive shaft can be achieved by relying solely on the drilling fluid pressure without using an electric drive system, thereby reducing power consumption and achieving more durable guiding work.

[0016] By adding an annular piston in the transfer chamber and setting magnetorheological fluid as the hydraulic medium, on the one hand, the precise control of the liquid inlet amount is improved and the accuracy of eccentricity control is improved. On the other hand, when encountering severe vibration or the drill bit entering the fault fracture zone, the magnetorheological fluid is stimulated, the stiffness of the magnetorheological fluid is greatly increased, and the magnetorheological fluid itself absorbs a large amount of impact force, thereby greatly reducing the pressure on the solenoid valve and the first high-pressure hose, and reducing the failure rate of the guide device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 1 is a schematic diagram of the three-dimensional structure of the eccentric assembly of the present invention; Figure 3 It is a cross-sectional view of the eccentric assembly described in the present invention. DETAILED DESCRIPTION

[0019] The following, in conjunction with the accompanying drawings and specific embodiments, further details the composite drill pipe automatic deviation correction and guidance device for kilometer-long directional drilling proposed by the present invention. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are highly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0020] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indications or This implies relative importance or implicitly indicates the number of technical features indicated. Thus, features specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means at least two, such as two or three, unless otherwise specifically specified.

[0021] It should be noted that the following figures are only used to illustrate the basic concept of the present invention. The diagram only shows components related to the present invention and is not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the status, quantity and proportion of each component may be changed arbitrarily, and the component layout status may also be more complicated.

[0022] Composite drill pipe automatic deviation correction and guidance device for kilometer-long directional drilling, such as Figure 1-3 As shown, it includes a housing 1, a drive shaft 2, a sensor assembly 3, an MCU controller assembly 4, an eccentric assembly 5, a centering bearing 6, and a sealing kit 7. One end of the drive shaft 2 is connected to the hydraulic motor, and the other end is connected to the drill bit. A drilling fluid main flow channel is provided in the drive shaft 2. The drive shaft 2 is installed in the eccentric assembly 5. The drive shaft 2 rotates through the centering bearing 6. The sensor assembly 3 and the MCU controller assembly 4 are both provided on the inner wall of the housing 1. The two sealing kits 7 are respectively provided at both ends of the housing 1 for elastic sealing between the housing 1 and the drive shaft 2. The eccentric assembly 5 includes a drive ring 51, a slider 52, a sleeve 54, a transfer cavity 55, an electromagnetic three-way valve 56, a one-way valve 57, a solenoid valve 58, and a flow meter 59. The drive ring 51 is a hollow annular structure. A plurality of hydraulic grooves 511 are provided on the outer periphery of the drive ring 51. The slider 52 is slidably connected to the hydraulic groove 511. A sliding sealing ring is provided between the slider 52 and the hydraulic groove 511 to prevent leakage of the hydraulic medium in the hydraulic groove. The hydraulic groove 511 is connected to the transfer cavity 55 on both sides through two first high-pressure hoses 512 respectively. The first high-pressure hose 512 is provided with a solenoid valve 58 and a flow meter 59. The ends of the plurality of sliders 52 are jointly supported on the housing 1. The inner ring of the drive ring 51 is connected to the drive shaft 2 through a bearing. The transfer cavity 55 is connected to the transfer cavity 55 through the second high-pressure hose 55. 1 is connected to the sleeve 54, and an electromagnetic three-way valve 56 is provided on the second high-pressure hose 551. The first passage of the electromagnetic three-way valve 56 is connected to the transfer chamber 55, the second passage is connected to the sleeve 54, and the third passage is connected to a one-way valve 57. The one-way valve 57 is provided on the housing 1 and is used to discharge the fluid to the outside of the housing 1. The working mode of the electromagnetic three-way valve 56 is set as follows: when it is open, the first and second passages are connected, and the third passage is closed; when it is closed, the first and third passages are connected, and the second passage is closed. The sleeve 54 is rotatably connected to the drive shaft 2, and a rotating sealing ring 541 is provided at the rotating connection. A through hole is opened on the drive shaft 2, and the through hole is located in the sleeve 54. The through hole is used to connect the internal space of the sleeve 54 with the main drilling fluid channel, so that the pressure of the main drilling fluid channel is present in the sleeve 54.

[0023] In some embodiments, the slider 52 is installed in the hydraulic groove 511 through a spring 53. The spring 53 is used to support the slider 52 to reduce the required liquid inlet pressure.

[0024] The MCU controller component 4 is electrically connected to the electromagnetic three-way valve 56, the electromagnetic valve 58, and the flow meter 59. The MCU controller component 4 is used to calculate the amount of liquid inlet to each hydraulic tank 511 according to the eccentricity requirement. For example, if the drive ring 51 needs to be set eccentrically upward, the lower hydraulic tank 511 needs to be filled with liquid, while the upper hydraulic tank 511 needs to be drained. For the hydraulic tank 511 that needs to be filled with liquid, the electromagnetic valve 58 and the electromagnetic three-way valve 56 on one side of the hydraulic tank 511 are opened. When the flow meter 59 detects that the amount of liquid inlet meets the requirement, the electromagnetic valve 58 and the electromagnetic three-way valve 56 on the other side of the hydraulic tank 511 are opened. When the valve 58 is closed, the hydraulic tank 511 that does not need to enter the liquid opens the solenoid valve 58 on the other side, allowing the liquid in the hydraulic tank 511 to be pressed into the transfer cavity 55 on the other side by itself, and finally discharged from the housing 1 through the one-way valve 57. After the eccentricity is completed, all the solenoid valves 58 are closed, and the drive shaft 2 produces a guiding effect under the action of the drive ring 51 and the center bearing 6. The system only needs to rely on its own drilling fluid 554 pressure to achieve the eccentric operation of the drive shaft 2, reducing the consumption of electricity and achieving more lasting guiding work.

[0025] Since there may be bubbles in the water flow in the main channel of the drilling fluid, when it enters the hydraulic tank 511, the flow meter 59 may produce an error, resulting in the slider 52 extending distance not being accurate enough. Therefore, in one embodiment, an annular piston 552 is provided in the transfer chamber 55, and the annular piston 552 divides the transfer chamber 55 into two independent parts, one part is connected to the hydraulic tank 511, and the other part is connected to the sleeve 54. The part connected to the hydraulic tank 511 is filled with a bubble-free hydraulic medium 553, and the part connected to the sleeve 54 is drilling fluid 554. When entering When performing eccentric operation, the electromagnetic three-way valve 56 on one side works, and the drilling fluid will push the annular piston 552, pressing the hydraulic medium 553 on the same side into the hydraulic groove 511 that needs to be filled with liquid. The hydraulic groove 511 that needs to be discharged will discharge the hydraulic medium 553 into the transfer cavity 55 on the other side. When performing the next eccentric operation, the electromagnetic three-way valve 56 on the other side works, which can push the annular piston 552 back, and so on. The hydraulic medium 553 only flows back and forth in the transfer cavity 55 and the hydraulic groove 511, and no bubbles will appear. The flow meter 59 can accurately measure the amount of liquid inflow.

[0026] In one embodiment, the hydraulic medium 553 is a magnetorheological fluid. The drive ring 51 is provided with an electromagnetic coil 513. The magnetorheological fluid is a suspension system composed of micron-sized soft magnetic particles (such as carbonyl iron) dispersed in a non-magnetic carrier fluid (silicone oil or mineral oil). When an external magnetic field is applied, the particles rapidly form a chain structure, causing the material to transform from a liquid to a semi-solid state. The shear yield strength can jump from 1 kPa to 50 kPa. When the sensor assembly 3 detects severe vibration or the drill bit enters a fault fracture zone, the MCU controller assembly 4 energizes the electromagnetic coil 513 to generate a magnetic field, excites the magnetorheological fluid, and significantly increases its stiffness, allowing the magnetorheological fluid to absorb a large amount of impact force. This significantly reduces the pressure on the solenoid valve 58 and the first high-pressure hose 512, and reduces the failure rate of the guide device. The drive ring 51 is made of magnetic shielding materials, such as permalloy and silicon steel. The magnetic field generated by the electromagnetic coil 513 acts only on the magnetorheological fluid, reducing the impact of the magnetic field on the sensor assembly 3. The MCU controller assembly 4 has a built-in lithium battery for powering the device.

[0027] The sealing kit 7 is a high-elastic air rubber sealing ring to achieve flexible sealing. The housing 1 is provided with retractable ribs, which are used together with the eccentric component 5 to achieve a coordinated deflection function.

[0028] A composite drill pipe automatic deviation correction and guidance method for kilometer-long directional drilling, the method comprising the following steps: S1: Continuously monitor the current posture and working condition of the drill pipe through the sensor component 3, and transmit the data to the MCU controller component 4 in real time; S2: The MCU controller component 4 compares the preset target trajectory with the posture and working condition information monitored by the sensor component 3 to determine the required eccentricity direction and eccentricity, and then calculates the liquid inflow volume of each hydraulic groove 511 on each drive ring 51; S3: Using the pressure of the drilling fluid main channel in the drive shaft 2 as the power source, the through hole on the drive shaft 2 connects the drilling fluid main channel with the interior of the sleeve 54, so that the drilling fluid pressure in the sleeve 54 is maintained. The MCU controller assembly 4 controls the electromagnetic three-way valve 56 corresponding to the target direction to open, and the drilling fluid enters the drilling fluid side of the transfer chamber 55, pushing the annular piston 552 to squeeze the hydraulic medium 553 on the other side; S4: The MCU controller assembly 4 opens the solenoid valve 58 corresponding to the hydraulic tank 511 on the side that needs to be filled with liquid. The hydraulic medium 553 enters the hydraulic tank 511 through the first high-pressure hose 512, pushing the slider 52 outward. The end of the slider presses against the housing 1, generating a biasing force. The flow meter 59 monitors the amount of liquid inflow in real time. When the calculated value is reached, the MCU controller assembly 4 controls the solenoid valve 58 to close to ensure the accurate extension of the slider. The solenoid valve 58 on the side of the hydraulic tank 511 that needs to be drained is opened. Under the action of external pressure, the hydraulic medium 553 in the hydraulic tank 511 flows into the transfer cavity 55 on the other side through the first high-pressure hose 512, and is discharged to the outside of the housing 1 through the third passage of the electromagnetic three-way valve 56 and the one-way valve 57. S5: Through the differential expansion and contraction of the slider 52, the drive ring 51 generates eccentricity in a preset direction in the housing 1, and then drives the drive shaft 2 to be synchronously eccentric through the bearing. At the same time, the drive shaft 2 maintains stable rotation under the constraint of the center bearing 6, thereby achieving guidance and correction of the drill bit in the target direction.

[0029] In one embodiment, magnetorheological fluid is used as the hydraulic medium 553. When the sensor detects severe vibration or enters the fault fracture zone, the MCU controller component 4 controls the electromagnetic coil 513 on the drive ring 51 to energize, so that the magnetorheological fluid hardens, absorbs the impact force, and reduces the pressure load of components such as the solenoid valve 58 and the high-pressure hose.

[0030] In one embodiment, the annular piston 552 in the transfer cavity 55 isolates the hydraulic medium 553 from the drilling fluid 554, ensuring that the hydraulic medium is free of bubbles, avoiding measurement errors of the flow meter 59, and improving the sliding block extension accuracy.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A composite drill pipe automatic deviation correction and guidance device for kilometer-long directional drilling, comprising a housing, a drive shaft, a sensor assembly, an MCU controller assembly, an eccentric assembly, a centering bearing, and a sealing kit. The drive shaft is provided with a main drilling fluid channel, is mounted in the eccentric assembly, and rotates through the centering bearing. The sensor assembly and the MCU controller assembly are both disposed on the inner wall of the housing, and the two sealing kits are respectively disposed at opposite ends of the housing. The device is characterized in that: The eccentric assembly includes a drive ring, a slider, a sleeve, a transfer cavity, an electromagnetic three-way valve, a one-way valve, a solenoid valve, and a flow meter. A plurality of hydraulic grooves are opened on the outer circumference of the drive ring. The slider is slidably connected to the hydraulic groove. A sliding sealing ring is provided between the slider and the hydraulic groove. The hydraulic groove is connected to the transfer cavity on both sides through two first high-pressure hoses respectively. The first high-pressure hose is provided with a solenoid valve and a flow meter. The ends of the plurality of sliders are jointly supported on the outer shell. The inner ring of the drive ring is connected to the drive shaft through a bearing. The transfer cavity is connected to the sleeve through a second high-pressure hose. The second high-pressure hose is provided with an electromagnetic three-way valve. The one-way valve is provided on the outer shell. The one-way valve is used to discharge fluid to the outside of the outer shell. The sleeve is rotatably sleeved on the drive shaft. A through hole is opened on the drive shaft. The through hole is located in the sleeve. The through hole is used to connect the internal space of the sleeve with the main flow channel of the drilling fluid.

2. The composite drill pipe automatic deviation correction and guidance device for kilometer-long directional drilling according to claim 1 is characterized in that: The slider is installed in the hydraulic groove through a spring, and the spring is used to support the slider.

3. The composite drill pipe automatic deviation correction and guidance device for kilometer-long directional drilling according to claim 1 is characterized in that: An annular piston is provided in the transfer chamber, which divides the transfer chamber into two independent parts, one part is connected to the hydraulic tank, and the other part is connected to the sleeve. The part connected to the hydraulic tank is filled with bubble-free hydraulic medium, and the part connected to the sleeve is drilling fluid.

4. The composite drill pipe automatic deviation correction and guidance device for kilometer-long directional drilling according to claim 3 is characterized in that: The hydraulic medium is magnetorheological fluid, and an electromagnetic coil is provided on the driving ring.

5. The composite drill pipe automatic deviation correction and guidance device for kilometer-long directional drilling according to claim 3 is characterized in that: The driving ring is made of magnetic shielding material.

6. The composite drill pipe automatic deviation correction and guidance device for kilometer-long directional drilling according to claim 1 is characterized in that: A rotating sealing ring is provided at the connection between the sleeve and the driving shaft.

7. The composite drill pipe automatic deviation correction and guidance device for kilometer-long directional drilling according to claim 1 is characterized in that: The MCU controller component has a built-in lithium battery.

8. The composite drill pipe automatic deviation correction and guidance device for kilometer-long directional drilling according to claim 1 is characterized in that: The sealing kit is a high-elastic air rubber sealing ring.

9. The automatic deviation correction and guidance method for composite drill pipe used for kilometer-long directional drilling according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: S1: Continuously monitor the current posture and working condition of the drill pipe through the sensor component, and transmit the data to the MCU controller component in real time; S2: The MCU controller component compares the preset target trajectory with the posture and working condition information monitored by the sensor component to determine the required eccentricity direction and amount, and then calculates the liquid inflow to each hydraulic groove on each drive ring; S3: Using the pressure of the drilling fluid main channel in the drive shaft as the power source, the through hole on the drive shaft connects the drilling fluid main channel with the interior of the sleeve to maintain the drilling fluid pressure in the sleeve. The MCU controller component controls the electromagnetic three-way valve corresponding to the target direction to open, and the drilling fluid enters the drilling fluid side of the transfer chamber, pushing the annular piston to squeeze the hydraulic medium on the other side; S4: The MCU controller assembly opens the solenoid valve corresponding to the hydraulic tank on the side that needs to be inlet. The hydraulic medium enters the hydraulic tank through the first high-pressure hose, pushing the slider outward. The end of the slider presses against the housing, generating a deflection force. The flow meter monitors the inflow in real time. When the calculated value is reached, the MCU controller assembly controls the solenoid valve to close to ensure the accurate extension of the slider. The solenoid valve on the side of the hydraulic tank that needs to be drained is opened. Under the action of external pressure, the hydraulic medium in the hydraulic tank flows into the transfer cavity on the other side through the first high-pressure hose and is discharged to the outside of the housing through the third passage of the electromagnetic three-way valve and the one-way valve. S5: Through the differential expansion and contraction of the slider, the drive ring produces eccentricity in a preset direction inside the housing, and then drives the drive shaft to eccentricity synchronously through the bearing. At the same time, the drive shaft maintains stable rotation under the constraint of the center bearing, realizing the guidance and correction of the drill bit to the target direction.

10. The method according to claim 9, characterized in that Magnetorheological fluid is used as the hydraulic medium. When the sensor detects severe vibration or enters the fault fracture zone, the MCU controller component controls the electromagnetic coil on the drive ring to energize.

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