Automatic deviation correcting device for ultra-deep hole curtain grouting drilling

Abstract

The invention discloses an automatic deviation correcting device for ultra-deep hole curtain grouting drilling, and belongs to the technical field of drilling. An automatic deviation correcting device for ultra-deep hole curtain grouting drilling comprises a drilling machine faucet, one end of the drilling machine faucet is connected with a high-pressure water conveying rubber pipe, drilling data are analyzed in real time through a system according to preset standards, once hole deviation is found, a screw drill is accurately controlled immediately to conduct angle fine adjustment, and the drilling accuracy is improved. And meanwhile, the main drill rod is cooperatively adjusted to rotate to calibrate the azimuth angle, so that the drilling angle can be ensured to accurately meet the design requirement no matter in the case of small deviation (less than 1 degree) by adopting progressive fine deviation correction of composite directional drilling or in the case of large deviation (greater than or equal to 1 degree) by adopting rapid and large-amplitude correction of sliding directional drilling. The problems that due to drilling deviation, a curtain grouting water blocking curtain is discontinuous, and the foundation anti-seepage effect is poor are effectively solved, long-term stable operation and safety performance of water conservancy and hydropower engineering are fundamentally guaranteed, and a solid guarantee is provided for engineering quality.

Description

Technical Field

[0001] This invention relates to the field of drilling technology, and more specifically, to an automatic deviation correction device for ultra-deep hole curtain grouting drilling. Background Technology

[0002] In today's society, with the rapid development of science and technology and the continuous advancement of infrastructure construction, water conservancy and hydropower projects, as key projects to ensure energy supply and rational utilization of water resources, are constantly increasing in scale and technical difficulty. Deep-hole curtain grouting drilling technology, as one of the core means of foundation treatment in water conservancy and hydropower projects, plays an irreplaceable role in enhancing the seepage prevention performance of the foundation, filling cracks and pores in rock and soil, and improving the integrity and strength of the rock and soil mass. It is of decisive significance for preventing foundation leakage and ensuring the long-term stable operation of the project. However, with increasingly stringent standards for water conservancy and hydropower engineering construction, the drilling depth for deep-hole curtain grouting is constantly increasing, posing unprecedented challenges to drilling construction. Drilling accuracy control has become a key bottleneck restricting project quality and construction efficiency. In traditional construction processes, as the drilling depth increases, ensuring the accuracy of the borehole inclination becomes extremely difficult. To ensure drilling accuracy and achieve the ideal deep-hole curtain grouting effect, construction units often have to reduce drilling speed and frequently perform drilling angle calibration. This approach not only significantly increases construction costs such as labor and machinery, seriously affecting the construction progress, but may also cause additional wear and tear on drilling equipment due to multiple calibration operations, further increasing construction costs. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic deviation correction device for ultra-deep hole curtain grouting drilling to solve the problems mentioned in the background art.

[0004] An automatic deviation correction device for ultra-deep hole curtain grouting drilling includes a drilling rig swivel. One end of the swivel is connected to a high-pressure water supply hose, and the upper end of the swivel is connected to a communication cable. One end of the communication cable is connected to a transmission cable, and the end of the transmission cable away from the communication cable is connected to a control box. The end of the control box away from the transmission cable is connected to a PC terminal, and one end of the PC terminal is connected to a power control unit. The drilling rig is a small, lightweight, medium-shallow hole core drilling rig used for diamond and alloy core drilling of various diameters, and can also be used for engineering geological exploration, hydrology, and well exploration. Maximum drilling depth: 300 m, vertical shaft speed: forward 0~1024 r / min / reverse 0~220 r / min, maximum vertical shaft torque: 4200 Nm. It is equipped with a multi-parameter acquisition system and a limit function to meet directional drilling requirements. It also includes a borehole unscrewing device and a clamping device to reduce labor intensity. The drilling rig swivel includes a cable-connecting drill rod, and a screw drill bit is connected to the end of the cable-connecting drill rod away from the communication cable.

[0005] Preferably, the cable drill rod includes a connecting device, the end of the connecting device away from the communication cable is connected to the drill rod body, an insulating device is connected to the inner cavity of the drill rod body, a conducting device is connected to the inner cavity of the insulating device, and a supporting device is connected to the outer side of the end of the insulating device away from the connecting device, and the outer side of the supporting device is connected to the inner wall surface of the drill rod body.

[0006] Preferably, the screw drill includes a drive shaft, a universal joint is connected to the end of the drive shaft away from the support device, a motor is connected to the end of the universal joint away from the drive shaft, and a drill bit is connected to the end of the drive shaft away from the universal joint. The drill bit and the drive shaft are connected through an anti-drop assembly.

[0007] Preferably, a bypass valve is connected to the top of the screw drill bit, and the end of the screw drill bit away from the drill bit is a non-magnetic drill rod. A measuring probe is connected to the inner cavity of the non-magnetic drill rod, and the bypass valve is located at the top of the screw drill bit to control the flow direction of the drilling fluid and balance the internal and external pressure difference to prevent backflow and blockage when the pump is stopped.

[0008] Preferably, the drill bit adopts a right-angled blade structure, which increases the tooth density. The drill bit body is formed by sintering. Compared with steel-bodied drill bits, drill bits formed by sintering have strong wear resistance, are not prone to diameter reduction, and have a long service life.

[0009] Preferably, the control box is equipped with a drilling data monitoring and processing system. The drilling data monitoring system relies on advanced digital sensing technology, collects signals from key parts of the equipment, automatically calculates and analyzes the operating status of the equipment, records relevant production data, and outputs indirect data results such as speed, torque, and operating rate by integrating the data. At the same time, it realizes the early warning and protection functions for motor and mechanism failures, and uses charts and graphs to intuitively display complex data.

[0010] Preferably, the measuring probe is used to monitor borehole-related data in real time, the cable drill rod is used to transmit borehole inclination data to the ground-based drilling data monitoring system, and the drilling data monitoring system is used to calculate, analyze and display borehole inclination data in real time. When a borehole inclination deviation is detected, the screw drill bit is controlled to make a fine adjustment to the borehole angle, and the main drill rod is controlled to rotate to adjust the borehole azimuth angle.

[0011] Preferably, the transmission cable connects the screw drilling tool to the drilling data monitoring and processing system via a cable-connected drill rod.

[0012] Compared with the prior art, the advantages of this invention are: 1. In this invention, the system analyzes drilling data in real time according to preset standards. Once a borehole deviation is detected, the screw drill is immediately and precisely controlled to make a fine-tuning of the angle. At the same time, the rotation of the main drill rod is adjusted to calibrate the azimuth angle. Whether it is a gradual and fine correction using composite directional drilling for small deviations (<1°) or a rapid and large-amplitude correction using sliding directional drilling for large deviations (≥1°), it can ensure that the borehole angle accurately meets the design requirements. This effectively avoids problems such as discontinuity of the curtain grouting water-blocking curtain and poor foundation seepage prevention caused by borehole deviation. It fundamentally ensures the long-term stable operation and safety performance of water conservancy and hydropower projects and provides a solid guarantee for project quality.

[0013] 2. In this invention, the device has the ability to monitor data in real time and respond quickly to correct deviations. The measuring probe collects data at a high frequency, the system quickly analyzes and processes the data and issues correction commands, and the screw drill and main drill rod work together to quickly adjust the drilling angle, which greatly shortens the time delayed due to drilling deviation. Therefore, there is no need for repeated low-speed calibration, the drilling speed is increased, the construction efficiency is significantly improved, and the construction progress of the entire water conservancy and hydropower project is accelerated. This is of great significance for projects with time-sensitive requirements, enabling them to be completed and put into use ahead of schedule.

[0014] 3. In this invention, the cable-connected drill pipe adopts a unique integrated structural design. The connecting device ensures the mechanical strength and electrical connectivity between drill pipes. The high-strength alloy drill pipe body has excellent anti-torsion and anti-bending performance. The insulation and conduction devices ensure stable signal transmission. The support device prevents the line from being damaged by vibration. The coordinated action of all components enables the drill pipe to transmit data stably even in the complex environment of ultra-deep hole drilling. The bypass valve of the screw drill bit ensures controllable drilling fluid flow and balanced pressure difference. The anti-drop assembly prevents the drill bit from falling off. The universal joint, drive shaft and other components are reasonably designed to ensure stable power transmission and flexible angle adjustment. These optimized designs effectively enhance the overall stability and reliability of the device, reduce the probability of equipment failure, reduce maintenance frequency, and ensure the smooth progress of the construction process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the drilling rig swivel structure of the present invention; Figure 3 This is a schematic diagram of the cable-connecting drill rod structure of the present invention; Figure 4 This is a schematic diagram of the screw drill structure of the present invention; Figure 5 This is a schematic diagram of the system flow structure of the present invention.

[0016] The following are the labels in the diagram: 1. Drill rig swivel; 101. Cable-connecting drill rod; 102. Screw drill bit; 104. Connecting device; 105. Drill rod body; 106. Insulation device; 107. Transmission device; 108. Support device; 109. Drive shaft; 110. Universal joint; 111. Motor; 112. Bypass valve; 113. Drill bit; 2. High-pressure water delivery hose; 3. Communication cable; 4. Transmission cable; 5. Control box; 6. PC terminal; 7. Power control. Detailed Implementation

[0017] Example: Please refer to Figure 1 An automatic deviation correction device for ultra-deep hole curtain grouting drilling includes a drilling rig swivel 1, one end of which is connected to a high-pressure water supply hose 2, and the upper end of the drilling rig swivel 1 is connected to a communication cable 3. One end of the communication cable 3 is connected to a transmission cable 4, and the end of the transmission cable 4 away from the communication cable 3 is connected to a control box 5. The end of the control box 5 away from the transmission cable 4 is connected to a PC terminal 6, and one end of the PC terminal 6 is connected to a power control 7. The drilling rig swivel 1 is connected to a geological drilling rig, which is a small and lightweight medium-shallow hole core drilling rig used for diamond and alloy core drilling of various diameters, and can also be used for engineering geological exploration, hydrology, and well exploration. Maximum drilling depth: 300m, vertical spindle speed: forward 0~1024r / min / reverse 0~220r / min, maximum vertical spindle torque: 4200Nm. With a multi-parameter acquisition system and limit setting function, it meets the requirements of directional drilling. It also includes a hole opening unscrewing device and a clamping device to reduce labor intensity. Please see Figure 2 The drilling rig swivel 1 includes a cable drill rod 101, and a screw drill tool 102 is connected to one end of the cable drill rod 101 away from the communication cable 3. The PC terminal 6 serves as the human-machine interface, running dedicated control software. Operators can set drilling parameter thresholds, select correction modes (automatic / manual), and view historical data, etc. Furthermore, the PC terminal 6 can automatically generate correction control commands based on the deviation analysis results of the drilling data monitoring system, including the tool face angle adjustment value of the screw drill bit, the rotation speed and steering control of the main drill pipe, and then convert the digital control commands into analog signals (such as 4-20mA current signals or 0-10V voltage signals), which are transmitted to the cable-connected drill pipe 101 through the transmission cable 4 and the communication cable 3, and finally reach the actuator of the screw drill bit 102.

[0018] Specifically, the system analyzes borehole data in real time according to preset standards. Once a borehole deviation is detected, the screw drill 102 is immediately and precisely controlled for angle fine-tuning. At the same time, the main drill rod is rotated to calibrate the azimuth angle. Whether it is using progressive fine correction with composite directional drilling for small deviations (<1°) or using rapid and large-amplitude correction with sliding directional drilling for large deviations (≥1°), it can ensure that the borehole angle accurately meets the design requirements. This effectively avoids problems such as discontinuity of the curtain grouting water-blocking curtain and poor foundation seepage prevention caused by borehole deviation. It fundamentally guarantees the long-term stable operation and safety performance of water conservancy and hydropower projects, and provides a solid guarantee for project quality.

[0019] Please see Figure 3 and Figure 4 The cable drill rod 101 includes a connecting device 104. The end of the connecting device 104 away from the communication cable 3 is connected to the drill rod body 105. An insulating device 106 is connected in the inner cavity of the drill rod body 105. A conducting device 107 is connected in the inner cavity of the insulating device 106. A supporting device 108 is connected to the outer side of the end of the insulating device 106 away from the connecting device 104. The outer side of the supporting device 108 is connected to the inner wall surface of the drill rod body 105. The connecting device 104 adopts a high-strength threaded connection to ensure the mechanical strength and electrical connectivity between drill pipes, and has a built-in waterproof sealing ring to prevent drilling fluid from seeping in and affecting the signal; The drill pipe body 105 is made of high-strength alloy steel and undergoes a special heat treatment process to improve its torsional strength (≥800MPa) and bending strength (≥1200MPa), which can withstand the complex stress during ultra-deep hole drilling. The insulation device 106 uses high-temperature and high-pressure resistant insulating materials such as polytetrafluoroethylene to isolate the conduction device 107 from the drill rod body 105, avoiding electromagnetic interference and leakage, and ensuring that the signal attenuation rate is <5% under 12MPa pressure. The transmission device 107 uses a multi-strand stranded shielded cable with a core of high-purity oxygen-free copper. The outer layer is wrapped with aluminum foil and braided mesh for double shielding, and the transmission rate can reach 10Mbps to meet the requirements of real-time data transmission. The support device 108 is composed of an elastic metal bracket, which is evenly distributed on the outside of the insulation device to fix the transmission device 107 to the center of the drill rod body 105, preventing damage to the line caused by vibration during drilling.

[0020] In one example, the screw drill 102 can be a "screw drill" disclosed in patent CN116357221A, which discloses a screw drill comprising a bypass assembly, an anti-drop assembly, a motor assembly, a universal joint assembly, and a drive shaft assembly connected in sequence. One end of the universal joint assembly is connected to the rotor assembly of the motor assembly, and the other end is provided with a drive shaft connector. The drive shaft assembly includes a main shaft, a limiting ring disposed on the outer periphery of the main shaft, and a disc spring assembly sleeved on the outer periphery of the main shaft. The main shaft and the drive shaft connector are rotatably connected, and both ends of the disc spring assembly abut against the limiting ring and the drive shaft connector, respectively. When relative rotation occurs between the drive shaft connector and the main shaft, the drive shaft connector is displaced axially relative to the main shaft to change the compression of the disc spring assembly. The disc spring assembly is sleeved on the outside of the main shaft. The end of the drive shaft connector facing the main shaft is provided with a threaded groove, and the outer periphery of the main shaft is provided with an external thread structure, which is threadedly connected to the threaded groove. The drive shaft connector is threaded to the main shaft, and the disc spring assembly is in a compressed state. The drive shaft connector drives the main shaft to rotate through the disc spring assembly. The drive shaft assembly also includes: a lower bearing housing, disposed within the second housing; a bearing inner sleeve, fitted onto the outer circumference of the main shaft, positioned below the anti-drop ring, with a second annular groove on its outer circumference; and an anti-drop screw, disposed on the lower bearing housing, with its end located within the second annular groove, used to limit the bearing inner sleeve 57. The motor assembly includes a stator assembly and a rotor assembly rotatably disposed within the stator assembly. A spiral channel for mud passage is formed between the rotor assembly and the stator assembly. A drainage channel is provided inside the rotor assembly. The anti-drop assembly includes: an anti-drop housing connected to the stator assembly of the motor assembly; an anti-drop rod rotatably disposed within the anti-drop housing, connected to the end of the rotor assembly away from the universal joint assembly, with a first drainage hole communicating with the drainage channel through the anti-drop rod along its own axial direction; and a pressure relief valve disposed at the end of the anti-drop assembly away from the rotor assembly, used to control the opening and closing of the first drainage hole. Mud flows inside the screw drill bit. Under pressure, the mud passes through the spiral channel between the rotor assembly and the stator assembly, thereby driving the rotor assembly to rotate. The rotor assembly drives the drive shaft assembly to rotate via the universal joint assembly. The bypass assembly includes: a bypass housing connected to the end of the anti-fall housing furthest from the stator assembly, the bypass housing having a second vent hole communicating with the annulus; a piston disposed within the bypass housing, the piston having a mud channel arranged along its own axial direction and a third vent hole communicating with the mud channel. The piston is slidable along the axial direction of the bypass housing, the piston having a first position state where the third vent hole is offset from the second vent hole and a second position state where the third vent hole is communicating with the second vent hole; and an elastic element disposed within the bypass housing, the two ends of the elastic element abutting against the piston and the bypass housing respectively, so as to keep the piston in the first position state.The universal joint assembly includes a first housing connected to the stator assembly and a universal joint assembly disposed within the first housing. One end of the universal joint assembly is provided with a drive shaft connector. The drive shaft assembly includes: a second housing connected to the end of the first housing away from the stator assembly; a main shaft passing through the second housing and rotatably connected to the second housing via a bearing assembly, with a first annular groove provided on the outer periphery of the main shaft; and an anti-drop ring disposed within the second housing and sleeved on the outer periphery of the main shaft for limiting the first annular groove of the main shaft. In summary, the "screw drill" disclosed in patent CN116357221A includes five parts: a bypass assembly, an anti-drop assembly, a motor assembly, a universal joint assembly, and a drive shaft assembly. The bypass housing of the bypass assembly, the anti-drop housing of the anti-drop assembly, the stator assembly of the motor assembly, the first housing of the universal joint assembly, and the second housing of the drive shaft assembly are connected to form an outer housing. The anti-drop rod, rotor assembly, universal joint assembly, and main shaft are connected to form a central rotating part.

[0021] See another example. Figure 4 The screw drill 102 includes a drive shaft 109, a universal joint 110 connected to one end of the drive shaft 109 away from the support device 108, a motor 111 connected to one end of the universal joint 110 away from the drive shaft 109, a bypass valve 112 connected to one end of the motor 111 away from the universal joint 110, and a drill bit 113 connected to the drive shaft 109 via an anti-drop assembly. Motor 111 consists of a stator and a rotor. When high-pressure drilling fluid (pressure ≥8MPa) enters the motor, a sealed cavity is formed between the stator and the rotor, which drives the rotor to rotate and converts hydraulic energy into mechanical energy. The output speed is 200-300r / min and the torque is 100-200Nm. The universal joint 110 converts the eccentric rotational motion of the rotor into the coaxial rotational motion of the drive shaft 109, while allowing a certain angle of skew (usually ≤3°), providing the possibility for angle adjustment. The drive shaft 109 is connected to the universal joint via a spline to transmit power to the drill bit. A thrust bearing is installed at its lower end to withstand the axial pressure (up to 50kN) during the drilling process. The anti-drop assembly uses a pin or snap ring structure to connect the drill bit to the drive shaft, preventing the drill bit from falling off while transmitting torque and axial force.

[0022] A bypass valve is connected to the top of the screw drill 102, and the end of the screw drill 102 near the bypass valve 112 is a non-magnetic drill rod. A measuring probe is connected to the inner cavity of the non-magnetic drill rod, and the bypass valve 112 is located at the top of the screw drill 102. It is used to control the flow direction of drilling fluid and balance the internal and external pressure difference to prevent backflow and blockage when the pump stops. During normal drilling, the drilling fluid pushes the valve core down to open the main channel; when the pump stops, the spring pushes the valve core up to close the main channel to prevent drilling fluid backflow and blockage of the motor, while balancing the internal and external pressure difference to protect the equipment. After the correction command is transmitted from the cable drill pipe 101 to the screw drill bit 102, the specific execution process is as follows: Tool face angle adjustment: The control box 5 sends an electrical signal to the servo mechanism (such as a stepper motor or hydraulic cylinder) of the screw drill 102. The servo mechanism generates directional thrust or torque, which acts on the movable joint of the universal joint. Since the universal joint is rigidly connected to the elbow joint and the drive shaft, the change in its yaw angle and direction will directly drive the elbow joint to deflect synchronously, thereby changing the relative angle relationship between the elbow joint and the drilling axis. For example, the stepper motor controls the deflection angle of the universal joint through precision gear transmission, while the hydraulic cylinder drives the universal joint to achieve directional yaw through the pressure difference of the hydraulic oil, so that the tool face angle is accurately adjusted to the target value.

[0023] Motor power output control: By adjusting the drilling fluid flow rate (range 20-80L / min) and pressure, the speed and torque of motor 111 are controlled, thereby adjusting the directional drilling intensity. The higher the flow rate, the higher the directional drilling rate.

[0024] Monitoring of the correction process: The probe is measured to provide real-time feedback on the tool face angle and drilling parameters, forming a closed-loop control to ensure the accuracy of the correction process; The measuring probe is installed in the non-magnetic drill rod cavity of the screw drill 102 near the drill bit 113. It adopts a high-precision sensor array to collect the drilling inclination angle (reflecting the degree of drilling inclination), azimuth angle (reflecting the horizontal deviation of the drilling), and tool face angle (a key parameter of the drilling direction of the screw drill 102) in real time. Its working principle is to use a triaxial accelerometer to sense the change of gravity field to calculate the inclination angle, use a triaxial magnetometer to detect the geomagnetic field to determine the azimuth angle, and combine a gyroscope to compensate for attitude changes to achieve parameter monitoring with millimeter-level accuracy. The data acquisition frequency can reach more than 10Hz to ensure real-time performance during dynamic drilling.

[0025] Drill bit 113 adopts a right-angled blade structure, which increases the tooth density. The drill bit body is formed by sintering. Compared with steel-body drill bits, drill bit 113, formed by sintering, has strong wear resistance, is not easy to shrink in diameter, and has a long service life. When the measuring probe detects borehole deviation, the drilling data monitoring system first decomposes the deviation into vertical plane deviation (dip deviation) and horizontal plane deviation (azimuth deviation) through spatial coordinate transformation, and then adopts different correction strategies according to the type and degree of deviation: Small deviation (<1°): Composite directional drilling is adopted, and the deviation is gradually corrected by finely adjusting the main drill rod speed and the tool face angle of the screw drill bit; Large deviation (≥1°): Use sliding directional drilling, stop the main drill rod rotation, precisely adjust the tool face angle to the target direction, and switch to compound drilling after the deviation decreases; Sliding directional drilling: The main drill rod does not rotate; only the screw drill bit rotates, and the direction of directional drilling is controlled by adjusting the tool face angle. It is suitable for scenarios that require large-angle correction. Composite directional drilling: The main drill rod and the screw drill tool 102 rotate simultaneously, and the tool face angle changes dynamically to achieve smooth correction at small angles, which is suitable for fine adjustment stages; When faced with large angular deviations, the drilling angle is gradually corrected to the design requirements by repeatedly adjusting the tool face angle and controlling the drilling depth. For example, when the borehole inclination deviation is large, the tool face angle is adjusted to the depression or elevation direction, and the borehole inclination angle is gradually reduced or increased by drilling through the screw drill 102. When the azimuth deviation is large, the tool face angle is adjusted to the target azimuth direction, so that the borehole azimuth gradually deviates. After each adjustment of the tool face angle, the measuring probe will monitor the borehole parameters in real time and transmit the data to the surface drilling data monitoring system. The system will evaluate the correction effect based on the new measurement data. If the deviation still does not meet the requirements, the tool face angle will be adjusted again until the borehole angle meets the design standards. Principle of directional drilling: When the tool face angle of the screw drill 102 is adjusted to the target direction, since the main drill rod does not rotate, the direction of the bend joint of the screw drill 102 remains fixed. At this time, high-pressure drilling fluid enters the motor 111, which drives the rotor to rotate, converting hydraulic energy into mechanical energy, and driving the drill bit to rotate and break the rock. Due to the presence of the bend joint, the drill bit will generate a lateral force on the hole wall during rotation, causing the borehole to deviate in the direction pointed to by the tool face angle, thereby achieving directional drilling. Furthermore, the elbow joint is a fixed structural component of the screw drill 102, which is rigidly connected to the main body of the screw drill 102, such as the motor 111 and the drive shaft 109. Its angle and direction have been determined according to the design requirements at the factory, and its spatial orientation will not change due to internal power transmission (such as the rotation of the motor rotor) during the drilling process. Furthermore, in composite directional drilling, the main drill rod and the screw drill tool rotate simultaneously, and the tool face angle is in a dynamic state, which is suitable for smooth correction of small angles. In contrast, in sliding directional drilling, the main drill rod does not rotate, and the tool face angle can be precisely fixed in the target direction, which can generate a larger build-up rate and is more suitable for large angle correction scenarios. In actual construction, sliding directional drilling is usually used first to initially correct large angle deviations. When the deviation is reduced to a certain extent (e.g., <1°), it is then switched to composite directional drilling for fine adjustment to achieve precise control of the borehole trajectory.

[0026] Specifically, the cable drill pipe 101 adopts a unique integrated structural design, the connecting device 104 ensures the mechanical strength and electrical connectivity between drill pipes, the high-strength alloy drill pipe body 105 has excellent anti-torsion and anti-bending performance, the insulation device 106 and the transmission device 107 ensure stable signal transmission, and the support device 108 prevents the line from being damaged by vibration. The coordinated action of these components enables the drill pipe to transmit data stably even in the complex environment of ultra-deep hole drilling. The bypass valve of the screw drill tool 102 ensures controllable drilling fluid flow and balanced pressure difference, the anti-drop assembly prevents the drill bit from falling off, and the universal joint 110, drive shaft 109 and other components are reasonably designed to ensure stable power transmission and flexible angle adjustment. These optimized designs effectively enhance the overall stability and reliability of the device, reduce the probability of equipment failure, reduce maintenance frequency, and ensure the smooth progress of the construction process.

[0027] Please see Figure 5 The control box 5 is equipped with a drilling data monitoring and processing system. Based on advanced digital sensing technology, the drilling data monitoring system automatically calculates and analyzes the operating status of the equipment by collecting signals from key parts of the equipment body, and records relevant production data. It integrates the data to output indirect data results such as speed, torque, and operating rate, and realizes early warning and protection functions for motor and mechanism failures. It uses charts and graphs to intuitively display complex data.

[0028] Please see Figure 5 The measuring probe is used to monitor borehole-related data in real time. The cable drill rod 101 is used to transmit borehole inclination data to the ground-based drilling data monitoring system. The drilling data monitoring system is used to calculate, analyze and display borehole inclination data in real time. When borehole inclination deviation is detected, the screw drill tool 102 is controlled to make fine adjustments to the borehole angle, and the main drill rod is controlled to rotate to adjust the borehole azimuth angle.

[0029] Specifically, this device possesses real-time data monitoring and rapid correction response capabilities. The measuring probe collects data at a high frequency, the system quickly analyzes and processes the data and issues correction commands, and the screw drill 102 and the main drill rod work together to quickly adjust the drilling angle, greatly reducing the time delay caused by drilling deviation. This eliminates the need for repeated low-speed calibration, thereby increasing drilling speed and significantly improving construction efficiency. This accelerates the construction progress of the entire water conservancy and hydropower project, which is of great significance for projects with time-sensitive requirements, enabling them to be completed and put into use ahead of schedule.

[0030] The transmission cable 4 is connected to the drilling data monitoring and processing system via the cable drill rod 101 and the screw drill tool 102.

[0031] Working principle: First, the measuring probe can monitor various relevant data in real time during the drilling process. Then, the cable drill rod 101 transmits the borehole inclination data monitored by the measuring probe to the drilling data monitoring system on the ground. After receiving the data, the drilling data monitoring system performs real-time calculation and analysis on the data and displays the borehole inclination data. It also analyzes the deviation of the borehole inclination. If the deviation is ≥1°, the PC terminal 6 will automatically generate a correction control command based on the deviation analysis result. Then, it is transmitted to the cable drill rod 101 through the transmission cable 4 and the communication cable 3, and finally reaches the actuator of the screw drill tool 102 to perform sliding directional drilling operation. Furthermore, the sliding directional drilling operation will keep the main drill rod 105 in a non-rotating state, so that the screw drill tool 102 will transmit the torque output by the actuator to the universal joint 110 through the transmission shaft 109, thereby driving the universal joint 110 to adjust the tool face angle, and then adjust the drill bit's directional direction and the tool face angle of the measuring probe until the deviation of the hole inclination analyzed by the system is reduced to <1°. Then, the PC terminal 6 will automatically generate a correction control command based on its deviation analysis results, and then transmit it to the cable drill rod 101 through the transmission cable 4 and the communication cable 3, and finally reach the actuator of the screw drill tool 102 to perform the composite directional drilling operation. Furthermore, the composite directional drilling operation causes the main drill pipe 105 and the screw drill 102 to rotate simultaneously, resulting in a continuous change in the tool face angle. At this time, the control of the tool face angle is no longer fixed in a certain target direction, but is achieved by adjusting the proportional relationship between the rotation speed of the main drill pipe and the rotation speed of the screw drill 102, as well as controlling parameters such as the flow rate and pressure of the drilling fluid, to control the range of change of the tool face angle and the average direction of the directional drilling until the deviation value of the hole inclination analyzed by the system is equal to 0. This achieves the correction of the deviation. After the deviation correction is completed, the high-pressure drilling fluid is delivered along the high-pressure water delivery hose 2 and the drill pipe 105 until it is delivered to the motor 111 in the screw drill 102. At this time, the high-pressure drilling fluid will drive the rotor to rotate, converting hydraulic energy into mechanical energy, thereby driving the drill bit to rotate and break the rock until the drilling operation is completed, thus ending all operations.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic deviation correction device for ultra-deep hole curtain grouting drilling, comprising a drilling rig swivel (1), characterized in that: One end of the drilling rig swivel (1) is connected to a high-pressure water supply hose (2), and the upper end of the drilling rig swivel (1) is connected to a communication cable (3). One end of the communication cable (3) is connected to a transmission cable (4). The end of the transmission cable (4) away from the communication cable (3) is connected to a control box (5). The end of the control box (5) away from the transmission cable (4) is connected to a PC terminal (6). One end of the PC terminal (6) is connected to a power control (7), and one end of the drilling rig swivel (1) is connected to a geological drilling rig. The swivel (1) of the drilling rig is connected to the cable drill rod (101), and the end of the cable drill rod (101) away from the communication cable (3) is connected to the screw drill tool (102).

2. The automatic deviation correction device for ultra-deep hole curtain grouting drilling according to claim 1, characterized in that: The cable drill rod (101) includes a connecting device (104), the end of the connecting device (104) away from the communication cable (3) is connected to a drill rod body (105), an insulating device (106) is connected in the inner cavity of the drill rod body (105), a conducting device (107) is connected in the inner cavity of the insulating device (106), and a supporting device (108) is connected to the outer side of the end of the insulating device (106) away from the connecting device (104).

3. The automatic deviation correction device for ultra-deep hole curtain grouting drilling according to claim 2, characterized in that: The screw drill (102) includes a drive shaft (109), with a universal joint (110) connected to one end of the drive shaft (109) near the support device (108), a motor (111) connected to one end of the universal joint (110) away from the drive shaft (109), and a bypass valve (112) connected to one end of the motor (111) away from the universal joint (110). The drill bit (113) is connected to the drive shaft (109) through an anti-drop assembly.

4. The automatic deviation correction device for ultra-deep hole curtain grouting drilling according to claim 3, characterized in that: The top end of the screw drill (102) is connected to a bypass valve (112), and the end of the screw drill (102) near the bypass valve (112) is a non-magnetic drill rod, and a measuring probe is connected to the inner cavity of the non-magnetic drill rod.

5. The automatic deviation correction device for ultra-deep hole curtain grouting drilling according to claim 4, characterized in that: The drill bit 113 adopts a right-angled blade structure, increases the tooth density, and the drill bit body is formed by sintering.

6. The automatic deviation correction device for ultra-deep hole curtain grouting drilling according to claim 5, characterized in that: The control box (5) is equipped with a drilling data monitoring and processing system. The drilling data monitoring system collects signals from key parts of the equipment body, automatically calculates and analyzes the operating status of the equipment, records relevant production data, and outputs data results of speed, torque and working rate by integrating the data. At the same time, it realizes the early warning and protection functions for motor and mechanism failures, and uses charts and graphs to intuitively display complex data.

7. The automatic deviation correction device for ultra-deep hole curtain grouting drilling according to claim 6, characterized in that: The measuring probe is used to monitor borehole-related data in real time. The cable drill rod (101) is used to transmit borehole inclination data to the ground drilling data monitoring system. The drilling data monitoring system is used to calculate, analyze and display borehole inclination data in real time. When borehole inclination deviation is detected, the screw drill bit (102) is controlled to make a fine adjustment of the borehole angle, and the main drill rod is controlled to rotate to adjust the borehole azimuth angle.

8. The automatic deviation correction device for ultra-deep hole curtain grouting drilling according to claim 7, characterized in that: The transmission cable (4) is connected to the drilling data monitoring and processing system via the cable drill rod (101) and the screw drill tool (102).

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