A flow diverter control system for a rotary steerable drilling tool

Abstract

The application discloses a shunt valve control system of a rotary steerable drilling tool and belongs to the technical field of drilling measurement and control. The system comprises a programmable logic controller and gamma ray sensors, valve controllers and alternating current contactors corresponding to a plurality of telescopic mechanisms of the rotary steerable drilling tool. The gamma ray sensors are used for measuring the gamma ray intensity of the corresponding orientation of the telescopic mechanisms and converting the gamma ray intensity into an electric signal to be transmitted to the programmable logic controller. The programmable logic controller is used for receiving the electric signal corresponding to the gamma ray intensity of each orientation and judging the borehole advancing trend according to the gradient of the gamma ray intensity of each orientation. According to the borehole advancing trend, the valve opening and closing instruction is sent to the alternating current contactor of the corresponding orientation. The alternating current contactor is used for controlling the valve controller according to the valve opening and closing instruction to make the drilling fluid shunt to obtain the corresponding drilling guiding force, so that the borehole advancing track advances according to the preset track. The system can improve the accuracy of the regulation and control of the borehole advancing trend.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drilling control, in particular to a shunt valve control system of a rotary steerable drilling tool. BACKGROUND

[0002] The use of horizontal wells / directional wells to realize the ground extraction of coalbed methane is helpful to prevent gas explosion and realize the resource utilization of coalbed methane. Increasing the extension distance of the borehole trajectory (horizontal section / directional section) in the coal seam is the key to obtaining the benefit of coalbed methane ground extraction, but the coal rock has low strength, developed cracks, and poor wellbore stability, so the risk of conventional bent-screw sliding steering drilling is extremely high. The rotary steerable drilling technology using near-bit measurement while drilling and full-rotation execution is the development trend of current coalbed methane directional drilling, which is expected to greatly improve the safety and mechanical drilling speed of the directional well section.

[0003] In view of the geological properties of coal rock, the rotary steerable drilling technology periodically controls the hydraulic mechanism to push against the well wall to obtain the guiding force based on the well circumference signals of measurement while drilling. In view of the significant difference in radioactivity between coal rock and roof and floor surrounding rock, the relationship between the borehole advancement trend and the coal seam distribution is generally determined based on the azimuth gamma signal of measurement while drilling. At present, the separate hydraulic pushing mechanism and the azimuth gamma detection device in the rotary steerable drilling tool system are relatively mature, and how to design the valve mechanism of the hydraulic pipeline according to the azimuth gamma signal to periodically control the extension and retraction of the hydraulic mechanism is the main bottleneck of the current coal seam rotary steerable drilling tool. The existing rotary steerable drilling tool has problems such as complex design, high manufacturing difficulty, low safety and reliability in the well, and low control precision.

[0004] Therefore, a shunt valve control system of a rotary steerable drilling tool is needed, which can improve the accuracy of controlling the borehole advancement trend and improve the drilling rate of directional wells or horizontal wells in the coal seam. SUMMARY

[0005] In view of the technical requirements of coal seam directional drilling on the rotary steerable drilling tool, the present application provides a shunt valve control system of a rotary steerable drilling tool, which can determine whether the advancement trend of the current borehole trajectory is consistent with the dip angle or azimuth of the preset coal seam according to the difference in the intensity of the azimuth gamma rays of the rotary steerable drilling tool, and then control the opening or closing of the corresponding valve to realize the control of the borehole advancement trend and improve the drilling rate of directional wells or horizontal wells in the coal seam.

[0006] The application provides a shunt valve control system of a rotary steerable drilling tool, which comprises a programmable logic controller and a gamma ray sensor, a valve controller and an alternating current contactor connected with a plurality of azimuth telescopic mechanisms of the rotary steerable drilling tool respectively, the gamma ray sensor is used for measuring the gamma ray intensity of the corresponding azimuth of the telescopic mechanism and converting the gamma ray intensity of the corresponding azimuth into an electric signal, the programmable logic controller is used for receiving the electric signal corresponding to the gamma ray intensity of each azimuth and judging the wellbore advancing trend according to the gradient of the gamma ray intensity of each azimuth, and sending a valve opening and closing instruction to the alternating current contactor of the corresponding azimuth according to the wellbore advancing trend, and the alternating current contactor is used for controlling the valve controller to make the drilling fluid shunt to obtain a corresponding drilling guiding force according to the valve opening and closing instruction, so that the wellbore advancing track advances according to a preset track.

[0007] The shunt valve control system can control the alternating current contactor to convert the electric signal into displacement change of the valve control rod according to a preset control program, so as to control the valve opening and closing state, make the rotary steerable drilling tool drill in the coal seam according to the preset track, reduce the coal seam sticking risk, and safely and efficiently improve the drilling rate of the drilling tool in the coal seam.

[0008] Optionally, the shunt valve control system further comprises an attitude sensor, a state sensor and a pressure sensor, the attitude sensor is used for acquiring the inclination information and azimuth information of the rotary steerable drilling tool in real time, the state sensor is used for measuring the rotating speed of the rotary steerable drilling tool in real time, and the pressure sensor is used for measuring the guiding force of each telescopic mechanism of the rotary steerable drilling tool.

[0009] Through real-time collection of the state information and pressure information of each azimuth telescopic mechanism and the inclination information and azimuth information of the drilling tool, the controller can be controlled in real time according to the attitude and state information of the drilling tool, and the safety and stability in the drilling process are improved.

[0010] Optionally, in the shunt valve control system, the alternating current contactor comprises an electromagnetic valve and a control rod, the electromagnetic valve is used for generating a force to drive the displacement of the control rod under the control of the current signal of the programmable logic controller, and the alternating current contactor further comprises an external valve body, a water stop plate, a retraction spring, a valve core, an O-shaped ring and a hexagonal cap, the external valve body is used for protecting the internal structure, the water stop plate is used for preventing fluid from entering the valve, the retraction spring is used for assisting the retraction of the control rod, and the valve core, the O-shaped ring and the hexagonal cap are used for stabilizing the control rod.

[0011] Optionally, in the shunt valve control system, if the difference between the gamma ray intensity values of each azimuth telescopic mechanism is less than a preset intensity value of the programmable logic controller, the shunt valve control system is kept closed, and if the difference between the gamma ray intensity values of each azimuth is greater than the preset intensity value of the programmable logic controller, the shunt valve control system is opened.

[0012] If the difference in gamma-ray intensity in each direction is less than a preset threshold, indicating that the drilling trend aligns with the coal seam distribution, the valve system remains closed. If the microprocessor determines that the wellbore tends to emerge from the coal seam from the higher side, it opens the valve rotated to the higher side via an AC contactor. High-pressure drilling fluid enters the hydraulic chamber of the guide device at the higher side of the wellbore and pushes the piston to support the higher side, providing downward guiding force. If the microprocessor determines that the wellbore tends to emerge from the lower side, it opens the valve rotated to the lower side via an AC contactor. High-pressure drilling fluid enters the hydraulic chamber of the guide device at the lower side of the wellbore and pushes the piston to support the lower side, providing upward guiding force. Through this scheme, the microprocessor determines whether the wellbore's direction of advance tends to emerge from the coal seam based on the differences in gamma-ray intensity in each direction and controls the wellbore's direction of advance to always remain within the preset coal seam.

[0013] Optionally, in the above-mentioned diversion valve control system, during the advance of the rotary steerable drilling tool along the coal seam, when the gamma ray intensity value of the outer rock layer is greater than the preset range of gamma ray intensity value of the coal seam, the solenoid valve generates a suction force to attract the control rod to retract and open the valve; when the gamma ray intensity value of the outer rock layer is less than the preset range of gamma ray intensity value of the coal seam, the solenoid valve generates a repulsive force and, under the action of the retraction spring, causes the control rod to retract and open the valve.

[0014] Optionally, in the above-mentioned diversion valve control system, the programmable logic controller is used to adjust the control frequency of the AC contactor according to the rotational speed measured by the state sensor, and the programmable logic controller is used to convert the gamma ray intensity into the current intensity so that the current intensity is proportional to the gamma ray intensity.

[0015] Optionally, in the above-mentioned diversion valve control system, the programmable logic controller is also used to predict the wellbore trajectory based on the well inclination and azimuth information of the rotary steered drilling tool measured by the attitude sensor, so as to control the valves of each telescopic mechanism according to the predicted wellbore trajectory.

[0016] Optionally, in the above-mentioned diversion valve control system, the programmable logic controller is also used to transmit the rotational speed, azimuth, and trajectory trend of the rotary steerable drilling tool to a remote terminal in real time.

[0017] Optionally, the diversion valve control system also includes a combination switch, a control switch, a thermal relay, a fuse, and a motor. The combination switch is used to control the opening and closing of the diversion valve control system, and the control switch is used to control the opening and closing of the motor.

[0018] The diversion valve control system provided by this invention measures the gamma intensity in each direction while the drill string is rotating. Based on the difference in gamma ray intensity in each direction, it determines whether the current wellbore trajectory's forward trend matches the dip angle / azimuth of the coal seam, and then issues corresponding valve opening and closing commands to regulate the wellbore's forward trend. This improves the accuracy of wellbore forward trend regulation and increases the drilling success rate of directional or horizontal wells in coal seams. Attached Figure Description

[0019] Figure 1 A schematic diagram of a diversion valve control system for a rotary steerable drilling tool according to an embodiment of the present invention is shown;

[0020] Figure 2 A schematic diagram of the internal structure of an AC contactor according to an embodiment of the present invention is shown;

[0021] Figure 3 A schematic diagram of the internal circuitry of a programmable logic controller according to an embodiment of the present invention is shown. Detailed Implementation

[0022] To make the objectives, technical solutions, and features of this invention clearer, the technical solution of this invention is described in detail below through a specific example. Obviously, the described embodiments are only a part of the embodiments of this invention, not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0023] Rotary steerable drilling systems have become an essential technology for complex ultra-deep directional wells and extended-range horizontal wells. Compared to sliding directional drilling, rotary steerable drilling offers more precise control over the wellbore trajectory, reducing frictional torque and downhole complications. To ensure that the rotary steerable drilling tool advances along a preset coal seam trajectory during rotation, this invention provides a diversion valve control system for the rotary steerable drilling tool. This system measures gamma ray intensity in all directions while the drill string is rotating, and determines whether the current wellbore trajectory trend matches the preset coal seam based on the differences in gamma ray intensity in each direction. The system controls the corresponding valve switches to regulate the wellbore advance trend, and further enhances the accuracy of this regulation through programmable relay control.

[0024] Figure 1 A schematic diagram of a flow divider valve control system for a rotary steered drilling tool according to an embodiment of the present invention is shown. Figure 1As shown, the system includes a programmable logic controller (PLC), a gamma ray sensor (R), an AC contactor (KM), and a switching assembly. The valve controller, built into the AC contactor (KM), is the switch for high-pressure drilling fluid to enter the hydraulic chamber of the guide device. SB is a contact of the control lever in the AC contactor. The combination switch QS in the switching assembly controls the operation and shutdown of the entire circuit system. Other switches may be added as needed. The thermal relay (FR) and fuse (FU) protect the circuit system and its components; their quantity and form include, but are not limited to, [missing information]. Figure 1 The form given in the document.

[0025] It should be noted that, Figure 1 The number of gamma ray sensors and AC contactors shown is merely exemplary. In actual operation, to change the drill bit direction of a rotary steerable drilling tool, typically three or four telescopic mechanisms are arranged every 90° or 120° around the circumference of the tool. Therefore, AC contactors and gamma ray sensors are required at each telescopic mechanism location. Each telescopic mechanism is controlled by a valve controller. Multiple valve controllers can be considered as a parallel connection of multiple AC contactors and contact mechanisms within the overall valve control system. These can be uniformly controlled by a programmable logic controller (PLC) according to a preset program. Each parallel circuit has a separate switch, controlled by the PLC to ensure precise control and prevent interference between valves. Specifically, the gamma ray sensor measures the gamma ray intensity at the corresponding location of the telescopic mechanism and converts it into an electrical signal. The PLC receives the electrical signals corresponding to the gamma ray intensities at each location, determines the wellbore advance trend based on the gradient of gamma ray intensities at each location, and sends valve opening / closing commands to the corresponding AC contactors based on the wellbore advance trend. The programmable logic controller (PLC) can also predict the wellbore trajectory based on the wellbore inclination and azimuth information of the rotary steered drilling tool measured by the attitude sensor, so as to control the valves of each telescopic mechanism according to the predicted wellbore trajectory. The AC contactor controls the valve controller to divert drilling fluid to obtain the corresponding drilling guidance force according to the valve opening and closing command, so that the wellbore trajectory follows the preset path. To obtain the operating condition of the rotary steered drilling tool in real time, the system can also include attitude sensors, status sensors, and pressure sensors installed near the drill bit. The attitude sensors are used to obtain the wellbore inclination and azimuth information of the rotary steered drilling tool in real time, the status sensors are used to measure the rotational speed of the rotary steered drilling tool in real time, and the pressure sensors are used to measure the guiding force of each telescopic mechanism of the rotary steered drilling tool.

[0026] Figure 2 A schematic diagram of the internal structure of an AC contactor according to an embodiment of the present invention is shown. Figure 2As shown, the AC contactor consists of an external valve body 1, an electrical signal input terminal 2, an electrical signal output terminal 3, an electromagnet 4, an upper magnet on the control lever 5, a control lever 6, a return spring 7, a valve core 8, an O-ring 9, a hexagonal cap 10, and a stop plate 11. The electrical signal input terminal 2, electromagnet 4, electrical signal output terminal 3, and upper magnet on the control lever 5 constitute a solenoid valve. This solenoid valve generates force under the control of the programmable logic controller's current signal, causing the control lever to move. The electrical signal is input at input terminal 2 and output at output terminal 3, increasing the magnetic induction intensity of the electromagnet 4. This force acts on the upper magnet on the control lever 5, and considering the attraction between the electromagnet and the upper magnet, this causes a corresponding displacement change in the control lever 6, thus opening the valve. The external valve body 1 primarily protects the internal structure; the stop plate 11 prevents fluid from entering the valve; the return spring 7 assists in the retraction of the control lever; and the valve core 8, O-ring 9, and hexagonal cap 10 provide securing and protection. Since the drill string contains high-pressure drilling fluid, it has high strength requirements. To enhance the pressure-bearing capacity of the valve section, it is necessary to select appropriate materials for the control rod, water stop plate, valve body, and drill string pipeline, and to conduct reasonable strength design. In addition, a groove can be added to the closed side of the control rod to increase the anchoring force.

[0027] like Figure 1 As shown, after the gamma ray sensor R senses the intensity of gamma rays at a corresponding location near the drill bit, it converts the gamma ray intensity signal into an electrical signal. This signal is then transmitted to the PLC via a transmission line and the input terminal of the programmable logic controller (PLC). Each gamma ray sensor measures the intensity of gamma rays at its corresponding location and converts it into an electrical signal, which is then transmitted to the PLC. The PLC determines whether the wellbore's forward direction has a tendency to encounter a coal seam based on the differences in gamma ray intensity at each location. It can pre-set the logic relationship between the difference in gamma ray intensity at each location and valve control based on the characteristics of the coal and rock strata, and determine whether the current wellbore trajectory's forward trend matches the dip angle / azimuth of the coal seam. It then issues corresponding valve opening and closing commands to regulate the wellbore's forward trend. The PLC transmits the corresponding valve opening and closing commands to the AC contactor KM via the transmission line, causing the valve controller to make a corresponding opening and closing response, specifically manifested as an increase or decrease in the displacement of the valve control lever. Specifically, if the difference between gamma ray intensity values ​​in various directions is less than the preset intensity value of the programmable logic controller (PLC), the diversion valve control system remains closed; if the difference between gamma ray intensity values ​​in various directions is greater than the preset intensity value of the PLC, the diversion valve control system opens. During the advance of the rotary steerable drilling tool along the coal seam, when the gamma ray intensity value of the outer rock layer is greater than the preset range of coal seam gamma ray intensity values, the solenoid valve generates suction to draw the control rod back and open the valve; when the gamma ray intensity value of the outer rock layer is less than the preset range of coal seam gamma ray intensity values, the solenoid valve generates repulsive force and, under the action of the return spring, causes the control rod to retract and open the valve.

[0028] Figure 3 A schematic diagram of the internal circuitry of a programmable logic controller according to an embodiment of the present invention is shown. Figure 3 As shown, the programmable logic controller (PLC) employs a relay output interface circuit. The PLC is used to simultaneously control the displacement of control rods in multiple AC contactors via this relay output interface circuit. To improve the accuracy and flexibility of the solenoid valves' control of the control rod displacement, AC power can be used with a diode rectifier circuit. The rectifier circuit changes the current direction of the relay output interface circuit, enabling both directional rectification of AC power under specific conditions and free conversion of the current direction in the circuit through the cooperation of the PLC and the rectifier unit. In another embodiment of the invention, a DC battery can also be used as the power source, making the entire control system an independent part of the drilling power supply and usage system. The current direction of the control system circuit can be changed through the cooperation of a special DC battery power source with reversible polarity and the PLC, depending on the actual drilling conditions.

[0029] To illustrate how the various components in this invention cooperate to ultimately achieve the control of the rotary guide drill bit by the diversion valve control system, taking the valve control section on one side of the drill string as an example, assuming the magnetic pole above the control rod is the S pole and the initial magnetic pole of the electromagnet above the control rod is the N pole, and the current intensity of the control system increases with the increase of the gamma ray intensity, then when the drill bit advances along the coal seam, when the gamma ray intensity of the outer rock layer deviating from the direction is greater than the gamma ray intensity range of the coal seam, the current intensity of the control system increases, and the force between the magnetic poles gradually increases. When it reaches the PLC preset value, the attraction control... When the control rod retracts, the valve opens, allowing high-pressure fluid to flow into the chamber and push the telescopic column outward. Conversely, when the drill bit's forward direction deviates towards a rock stratum with gamma-ray intensity less than that of the coal seam, the combined action of AC power, the controller, and its simple diode rectifier changes the current direction in the circuit. The lower pole of the electromagnet in the AC contactor then becomes the S-pole. As the gamma-ray intensity decreases, when it reaches the PLC's preset value, the electromagnet's repulsive force on the control rod simultaneously decreases to the allowable push value of the return spring, causing the control rod to retract and the valve to open. Multiple valves connected in parallel, each controlling its control rod displacement and diverting the flow according to the same principle, regulate their respective telescopic mechanisms to achieve movement in multiple directions. Furthermore, the PLC controls the frequency of the AC contactor to match the rotational speed, ultimately achieving the purpose of drilling guidance.

[0030] The above scheme measures gamma intensity in each direction during drilling and, based on the differences in gamma ray intensity in each direction, determines whether the current wellbore trajectory's forward trend matches the dip / azimuth of the coal seam. This allows for the issuance of corresponding valve opening and closing commands to regulate the wellbore's forward trend. The diversion valve control system provided by this invention improves the accuracy of wellbore forward trend regulation and can predict the wellbore trajectory, thereby increasing the drilling success rate of directional or horizontal wells in coal seams.

[0031] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0032] Similarly, it should be understood that, in order to streamline this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.

[0033] Those skilled in the art will understand that modules, units, or components of the devices disclosed in the examples herein can be arranged in the devices described in this embodiment, or alternatively, can be located in one or more devices different from the devices in this example. The modules in the foregoing examples can be combined into a single module or, in addition, can be divided into multiple sub-modules.

[0034] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0035] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0036] Furthermore, some of the embodiments described herein are methods or combinations of method elements that can be implemented by a processor of a computer system or by other means of performing the functions. Therefore, a processor having the necessary instructions for implementing the methods or method elements forms means for implementing the methods or method elements. Furthermore, the elements described herein in the apparatus embodiments are examples of means for implementing the functions performed by elements for the purposes of carrying out the invention.

[0037] As used herein, unless otherwise specified, the use of ordinal numbers such as “first,” “second,” “third,” etc., to describe ordinary objects merely indicates different instances of similar objects and is not intended to imply that the objects being described must have a given order in time, space, ordering, or any other manner.

[0038] Although the invention has been described with respect to a limited number of embodiments, those skilled in the art will understand from the foregoing description that other embodiments are conceivable within the scope of the invention described herein. Furthermore, it should be noted that the language used in this specification has been chosen primarily for readability and edibility purposes, and not for the purpose of explaining or limiting the subject matter of the invention.

[0039] Therefore, many modifications and alterations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. The disclosure of this invention is illustrative rather than restrictive, and the scope of the invention is defined by the appended claims.

Claims

1. A flow divider valve control system for a rotary steerable drilling tool, characterized in that, The system includes a programmable logic controller (PLC) and gamma ray sensors, valve controllers, and AC contactors connected to the telescopic mechanisms at multiple locations of the rotary steerable drilling tool. The gamma ray sensors measure the gamma ray intensity at the corresponding location of the telescopic mechanism and convert the gamma ray intensity at the corresponding location into an electrical signal. The PLC receives the electrical signal corresponding to the gamma ray intensity at each location and determines the wellbore advance trend based on the gradient of the gamma ray intensity at each location. Based on the wellbore advance trend, the PLC sends a valve opening / closing command to the AC contactor at the corresponding location. The AC contactor controls the valve controller to divert drilling fluid to obtain a corresponding drilling guide force, so that the wellbore advances along a preset trajectory. The system also includes an attitude sensor, a status sensor, and a pressure sensor. The attitude sensor is used to acquire the well inclination and azimuth information of the rotary steerable drilling tool in real time. The status sensor is used to measure the rotational speed of the rotary steerable drilling tool in real time. The pressure sensor is used to measure the guiding force of each telescopic mechanism of the rotary steerable drilling tool in azimuth. The AC contactor includes a solenoid valve and a control rod. The solenoid valve is used to generate a force under the control of a current signal from a programmable logic controller to drive the control rod to move. If the difference between the gamma ray intensity values ​​at each azimuth telescopic mechanism is less than the preset intensity value of the programmable logic controller, the diversion valve control system remains closed; if the difference between the gamma ray intensity values ​​at each azimuth is greater than the preset intensity value of the programmable logic controller, the diversion valve control system opens. During the advance of the rotary steerable drilling tool along the coal seam, when the gamma ray intensity value of the outer rock layer is greater than the preset range of gamma ray intensity value of the coal seam, the solenoid valve generates a suction force to attract the control rod to retract and open the valve; when the gamma ray intensity value of the outer rock layer is less than the preset range of gamma ray intensity value of the coal seam, the solenoid valve generates a repulsive force and, under the action of the retraction spring, causes the control rod to retract and open the valve. The programmable logic controller is used to adjust the control frequency of the AC contactor according to the rotational speed measured by the state sensor, and the programmable logic controller is used to convert the gamma ray intensity into the current intensity so that the current intensity is proportional to the gamma ray intensity. The programmable logic controller is also used to predict the wellbore trajectory based on the well inclination and azimuth information of the rotary steered drilling tool measured by the attitude sensor, so as to control the valves of each telescopic mechanism according to the predicted wellbore trajectory.

2. The diversion valve control system according to claim 1, characterized in that, The AC contactor also includes an external valve body, a water stop plate, a return spring, a valve core, an O-ring, and a hexagonal cap. The external valve body is used to protect the internal structure, the water stop plate is used to prevent fluid from entering the valve, the return spring is used to assist the control rod in retraction, and the valve core, O-ring, and hexagonal cap are used to stabilize the control rod.

3. The diversion valve control system according to claim 1, characterized in that, The system also includes a combination switch, a control switch, a thermal relay, a fuse, and a motor. The combination switch is used to control the opening and closing of the diversion valve control system, and the control switch is used to control the opening and closing of the motor.

4. The diversion valve control system according to claim 1, characterized in that, The programmable logic controller is also used to transmit the rotational speed, azimuth, and trajectory trend of the rotary steerable drilling tool to a remote terminal in real time.

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