Anti-deviation drilling rig

Abstract

The anti-deviation drilling device comprises a base supported on the ground, a clamping mechanism and a drilling mechanism, the clamping mechanism and the drilling mechanism are arranged on the base, and a hole for a drill rod to drill downwards is reserved in the center of the base; the drilling mechanism comprises a supporting column vertically fixed to the base and a fixing seat fixed to the top of the supporting column, a drill rod is installed on the fixing seat, and the drill rod is driven by a driving device arranged on the fixing seat to drill downwards; the clamping mechanism comprises at least two sets of clamping modules which are both arranged between the base and the fixing base and used for clamping the drill rod, the at least two sets of clamping modules are arranged in a vertically spaced mode to effectively restrain the drill rod, and deviation is prevented. According to the invention, deviation prevention can be carried out on the drilling process of the drill rod from a mechanical structure at a source, meanwhile, the deviation angle is dynamically monitored in real time and early warning is carried out in the drilling process, and automatic dynamic adjustment can be carried out according to the early warning condition to ensure that the deviation of the drill rod does not have large deviation.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling devices, and more particularly to an anti-drift drilling device. Background Art

[0002] During geological drilling, the drilling device and the drill bit need to be precisely positioned at the drilling point first, and then the drilling work is carried out according to the drilling depth. Due to geological or drilling device reasons, the drill bit may deviate from the set drilling center during the drilling process. In the existing technology, the deviation is generally detected during the drilling process and the displacement is adjusted to meet the requirements. However, how to adjust it, to what extent, how to ensure that the deviation does not deviate significantly, etc., are not fully disclosed in the existing technology, or only the deviation alarm is disclosed, and how to adjust it later is not disclosed. Another method is to prevent the deviation during the drilling process as much as possible through reasonable structural settings before drilling. This method cannot guarantee the possible deviation during the entire drilling process. If there is a deviation, how to issue an early warning and how to respond after the warning are all existing technical problems, which affect the effective control of anti-drift during the drilling process. Summary of the Invention

[0003] One purpose of the present invention is to provide an anti-drift drilling device, which can not only prevent the drill rod from drifting at the source from a mechanical structure perspective, but also dynamically monitor the deviation angle in real time during the drilling process and issue an early warning, and can also automatically and dynamically adjust according to the early warning situation to ensure that the drill rod deviation will not deviate significantly.

[0004] In order to solve the above technical problems, the present invention provides an anti-drift drilling device, comprising a base supported on the ground and a clamping mechanism and a drilling mechanism arranged on the base, wherein a hole for drilling downwards with a drill rod is reserved in the center of the base; the drilling mechanism comprises a support column vertically fixed to the base and a fixed seat fixed to the top of the support column, a drill rod is installed on the fixed seat, a drill bit is connected to the end of the drill rod, and the drill rod is driven downward to drill by a driving device arranged on the fixed seat; the clamping mechanism comprises at least two groups of clamping modules, both of which are arranged between the base and the fixed seat and are used to clamp the drill rod, and the at least two groups of clamping modules are arranged at intervals up and down to form an effective constraint on the drill rod to prevent deviation.

[0005] Preferably, it also includes a guide sleeve, which is driven into and fixed to the ground. The guide sleeve is located in the hole in the center of the base. The center of the guide sleeve is vertically downward and coincides with the central axis of the borehole to be drilled by the drill rod. The guide sleeve includes an integrally formed upper part, middle part and lower part. The upper part and the lower part are both cylindrical and the inner diameter of the upper part is larger than the inner diameter of the lower part. The middle part is a truncated cone that connects the upper part and the lower part into one. The inner diameter of the lower cylindrical part is consistent with the outer diameter of the drill rod. Half of the upper part protrudes from the ground and is fixedly connected to the base.

[0006] Preferably, the base is composed of a plurality of foundation blocks, a layer of film fixing bag is laid on the ground, which is annular and located outside the guide sleeve, and the fixing bag is filled with epoxy resin to form a fixing layer with a smooth surface. The plurality of foundation blocks are arranged on the fixing layer and anchored underground, and the inner end of the foundation block facing the guide sleeve is arc-shaped to fit tightly against the guide sleeve, and the plurality of foundation blocks are evenly spaced and fixed tightly against the outer wall of the guide sleeve.

[0007] Preferably, the clamping modules are arranged in two groups to form an upper and lower layer, each group of clamping modules includes at least three clamping arms, each clamping arm is correspondingly provided with a hydraulic cylinder and drives the clamping arm to move closer to or away from the drill rod, the moving direction of the clamping arm passes through and is perpendicular to the central axis of the drill rod, the hydraulic cylinder is fixedly provided on the base and the telescopic rod of the hydraulic cylinder is provided parallel to the plane of the base, the telescopic rod of the hydraulic cylinder is fixedly connected to the clamping arm, the inner end face of the clamping arm facing the drill rod is provided to match the arc shape of the outer wall of the drill rod, and the clamping arms corresponding to the upper and lower groups of clamping modules are evenly staggered at 30°-60° on the horizontal projection plane.

[0008] Preferably, a support rod is fixedly provided on the lower surface of the clamping arm, and its bottom end is slidably provided on the base. The base is provided with a slide rail corresponding to the moving direction of each clamping arm, which is used to cooperate with the sliding of the bottom of the support rod.

[0009] Preferably, the drill rod is evenly provided with multiple threaded ends along its vertical direction, which are formed by providing spiral grooves on the surface of the drill rod, and the spiral direction of the spiral grooves is opposite to the rotation direction of the drill rod; a shock-absorbing ring is fixedly provided on the base, and the ring is filled with polyurethane. The shock-absorbing ring is located at the top of the guide sleeve, and the inner diameter of the shock-absorbing ring is the same as the outer diameter of the drill rod.

[0010] Preferably, an intelligent control system is further included, which includes a cylinder control module, and the multiple hydraulic cylinders corresponding to the multiple clamping arms corresponding to each group of clamping modules are all controlled to open, close and travel by the cylinder control module.

[0011] Preferably, the intelligent control system also includes a deflection angle monitoring system, which includes a coordinate acquisition module, a calculation module, a judgment module and an alarm module. A total station is set on the ground, which is used to obtain the coordinates of the initial fixed point at the top of the drill rod, and a downhole inclinometer is set at the bottom of the drill rod, which is used to obtain the real-time coordinates of the bottom of the drill rod. The coordinate acquisition module obtains the initial fixed point coordinate data monitored by the total station and the real-time coordinate data of the bottom of the drill rod monitored by the downhole inclinometer, and transmits them to the calculation module. The calculation module calculates the deflection angle θ in real time through the coordinates of the two points, and transmits the deflection angle to the judgment module. The judgment module determines whether the deflection angle exceeds the set warning threshold. If it exceeds, an alarm is issued through the warning module.

[0012] Preferably, the judgment module also transmits data with the cylinder control module. When the judgment module determines that the deflection angle exceeds the set warning threshold, it calculates the adjustment amount according to the set formula and transmits the adjustment amount to the cylinder control module to control the corresponding hydraulic cylinder to adjust according to the calculated adjustment amount. , where k is the correction coefficient, which is 0.8-1.2, and ΔL is the single drilling depth; if the deviation angle θ is not greater than 0.5°, Δθ is the deviation angle; if the deviation angle θ is greater than 0.5°, Δθ is 0.5°.

[0013] Preferably, a pressure sensor is provided on the inner end face corresponding to each clamping arm and the drill rod, which is used to obtain the pressure value between the clamping arm and the drill rod and transmit it to the cylinder control module. The cylinder control module determines the maximum pressure value and controls the hydraulic cylinder corresponding to the maximum pressure value to move according to the calculated adjustment amount.

[0014] The present invention has at least the following beneficial effects: 1. The present invention uses a guide sleeve structure and multiple groups of clamping modules to pre-align and fix the position of the drill rod during the lowering process to prevent it from deflecting.

[0015] 2. The base of the present invention is adjusted to a horizontal state by a film fixing bag to compensate for the deviation caused by the uneven ground when the drill rod is lowered not vertically. After the base surface is level, the various structures thereon can be installed and set according to the processing state, thereby avoiding the deviation caused by the drill rod swinging during the lowering process and the initial installation state not meeting the requirements from the mechanical structure.

[0016] 3. The rational design of the multiple clamping module structures of the present invention forms a three-dimensional spatial constraint network, which effectively resists lateral forces from different directions. For example, in shale gas drilling, the clamping structure designed in the present invention can withstand lateral pressures of 2000-5000N / m² generated by formation heterogeneity. At the same time, each clamping arm is equipped with an independent hydraulic cylinder, which is controlled by a proportional valve to achieve synchronous clamping, ensuring that the forces at each clamping point are balanced. This can not only prevent deviation during the drilling process, but also compensate for the impact force of the drill pipe during drilling.

[0017] 4. The contact surface between the clamping arm and the drill rod of the present invention is provided with a pressure sensor to obtain the pressure value, and at the same time cooperates with the deflection angle monitoring system to monitor the calculated deflection angle. When it exceeds the set warning threshold range, the corresponding clamping arm is adjusted according to the calculated adjustment amount through the pressure sensor value. While realizing the warning, it can also perform automatic dynamic adjustment according to the warning situation to ensure that the drill rod offset will not have a large deviation.

[0018] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a top view on the base of the present invention.

[0020] Description of reference numerals: 1. Base, 2. Support column, 3. Fixed seat, 4. Drill rod, 5. Guide sleeve, 6. Foundation block, 7. Clamping arm, 8. Hydraulic cylinder, 9. Support rod, 10. Shock absorber ring. DETAILED DESCRIPTION

[0021] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below with reference to the accompanying drawings so that those skilled in the art can implement it according to the description.

[0022] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "horizontal", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0023] like Figure 1 and Figure 2 As shown, the present invention provides an anti-drift drilling device, comprising a base 1 supported on the ground and a clamping mechanism and a drilling mechanism arranged on the base 1, wherein a hole for a drill rod to drill downward is reserved in the center of the base; the drilling mechanism comprises a support column 2 vertically fixed to the base and a fixing seat 3 fixed to the top of the support column 2, a drill rod 4 is installed on the fixing seat 3, a drill bit is connected to the end of the drill rod, and the drill rod is driven downward to drill by a driving device arranged on the fixing seat; the clamping mechanism comprises at least two groups of clamping modules, both of which are arranged between the base and the fixing seat and are used to clamp the drill rod, and the at least two groups of clamping modules are arranged at intervals up and down to form an effective constraint on the drill rod to prevent deviation.

[0024] The base is used to fix the entire drilling device. The top surface of the base is set to be horizontal, the fixing seat is set parallel to the base, and the drill rod is set on the fixing seat to form a vertical downward state, so that the initial state of the drill rod is a standard position state without deviation. The drive device corresponding to the present application is a fixed drive device, such as a rotary drilling rig. The drive device (turntable) is fixed to the base of the drilling rig and does not move with the descent of the drill rod. Large-area and multi-directional clamping of the drill rod can be achieved by at least two sets of clamping modules, thereby forming an effective constraint on the drill rod, thereby preventing the drill rod from deflecting during the drilling process.

[0025] In another technical solution, a guide sleeve 5 is also included, which is driven into and fixed to the ground. The guide sleeve 5 is located in the hole in the center of the base 1. The center of the guide sleeve 5 is vertically downward and coincides with the central axis of the borehole to be drilled by the drill rod 4. The guide sleeve includes an integrally formed upper part, middle part and lower part. The upper part and the lower part are both cylindrical and the inner diameter of the upper part is larger than the inner diameter of the lower part. The middle part is a truncated cone that connects the upper part and the lower part into one. The inner diameter of the lower cylindrical part is consistent with the outer diameter of the drill rod. Half of the upper part protrudes from the ground and is fixedly connected to the base.

[0026] On the one hand, the setting of the guide sleeve can guide the lowering of the drill rod for drilling, preventing the drill rod from deflecting during the lowering process, which is not conducive to deflection adjustment after it is underground; on the other hand, it also has a certain clamping effect on the drill rod, and works together with the clamping module to effectively constrain the drill rod and prevent deflection; on the other hand, the early placement of the guide sleeve in the ground can prevent the formation from being broken during the drilling process, which in turn causes the drill rod to deflect. If the guide sleeve is placed in the ground in advance, the position of the guide sleeve is adjusted, and the cracked soil layer on the ground is treated and reinforced, it is equivalent to pre-treating the surface soil layer in advance, which can facilitate the stable drilling of the drill rod and prevent deflection. The guide sleeve is fixed to the base as a whole, which fixes and guarantees the position and structural stability of the guide sleeve.

[0027] In another technical solution, the base is composed of a plurality of foundation blocks 6, a layer of film fixing bag is laid on the ground, which is annular and located outside the guide sleeve 5, and the fixing bag is filled with epoxy resin to form a fixing layer with a smooth surface. The plurality of foundation blocks 6 are arranged on the fixing layer and anchored underground. The inner end of the foundation block 6 facing the guide sleeve 5 is arc-shaped to fit tightly against the guide sleeve 5, and the plurality of foundation blocks 6 are evenly spaced and tightly fixed to the outer wall of the guide sleeve 5.

[0028] During drilling construction, the ground is often uneven. If the base is installed directly, the base, support columns, and fixed bases all have flat surfaces. If the base is installed tilted, the entire drill pipe will be offset from its initial state after installation, making adjustment difficult. Therefore, before the structure is installed and the guide sleeve is installed, the ground is preliminarily cleaned. On the other hand, a film fixing bag is installed on the outside of the guide sleeve, which is placed directly on the ground and is approximately the same size as the base. The film fixing bag can be confined within it by two annular fixing plates. Epoxy resin is then filled into the film fixing bag. Initially, the epoxy resin is in a fluid state, and the level of the film fixing bag surface is constantly monitored by its fluid state. The epoxy resin solidifies quickly and has high strength. Because the level of the film fixing bag surface is adjusted by its fluid state before the epoxy resin completely solidifies, the base can be installed on the film fixing bag. This ensures that the base is horizontal after installation and is not affected by ground unevenness, thereby ensuring that the initial state of the drill pipe after installation remains unchanged. The foundation blocks are generally set to 3 or 4 pieces of the same size, and are installed evenly spaced outside the guide sleeve. After being tightly pressed against the guide sleeve, the foundation blocks are fixed to the ground by anchor rods or other means to achieve fixed installation of the base.

[0029] In another technical solution, the clamping modules are arranged in two groups to form an upper and lower layer. Each group of clamping modules includes at least three clamping arms 7. Each clamping arm 7 is correspondingly provided with a hydraulic cylinder 8 and drives the clamping arm 7 to move closer to or away from the drill rod 4. The moving direction of the clamping arm 7 passes through and is perpendicular to the central axis of the drill rod 4. The hydraulic cylinder 8 is fixedly arranged on the base 1 and the telescopic rod of the hydraulic cylinder 8 is arranged parallel to the plane of the base. The telescopic rod of the hydraulic cylinder 8 is fixedly connected to the clamping arm 7. The clamping arm 7 is arranged to face the inner end face of the drill rod in an arc shape matching the outer wall of the drill rod. The clamping arms 7 corresponding to the upper and lower groups of clamping modules are evenly staggered at 30°-60° on the horizontal projection plane.

[0030] The clamping arms corresponding to each set of clamping modules are generally set to three or four, which are evenly spaced in the circumference. Fixed hydraulic cylinders drive the clamping arms to stably clamp and fix the drill pipe from different directions after the drill pipe is installed, thereby achieving stable support for the lowering of the drill pipe and avoiding deviation. The multiple clamping arms of the clamping module are staggered in space to form a three-dimensional spatial constraint network, which effectively resists lateral forces from different directions and prevents deviation. Each clamping arm is equipped with an independent hydraulic cylinder, which is controlled by a proportional valve to achieve synchronous clamping to ensure that the force at each clamping point is balanced. On the one hand, it can prevent deviation during the drilling process, and on the other hand, it can compensate for the impact force of the drill pipe during drilling.

[0031] In another technical solution, a support rod 9 is fixedly provided on the lower surface of the clamping arm, and its bottom end is slidably provided on the base 1. The base 1 is provided with a slide rail corresponding to the moving direction of each clamping arm 7, which is used to cooperate with the sliding of the bottom of the support rod 9.

[0032] In the process of the clamping arm supporting and clamping the drill rod, in order to avoid excessive lateral pressure on the drill rod causing the strength of the clamping arm and other supporting forces to be insufficient, resulting in deviation or other situations, a support rod is fixed on the bottom surface of the clamping arm. On the one hand, it increases the strength of the clamping arm, and on the other hand, it can stabilize the position of the clamping arm, and also cooperates with the linear movement of the hydraulic cylinder through the setting of the slide rail.

[0033] In another technical solution, the drill rod is evenly provided with multiple threaded ends along its vertical direction, which are formed by setting spiral grooves on the surface of the drill rod, and the spiral direction of the spiral grooves is opposite to the rotation direction of the drill rod; a shock-absorbing ring 10 is fixedly provided on the base, and the ring is filled with polyurethane. The shock-absorbing ring 10 is located at the top of the guide sleeve, and the inner diameter of the shock-absorbing ring 10 is the same as the outer diameter of the drill rod 4.

[0034] The spiral grooves alter the flow path of the drilling fluid, dissipating vibration energy through eddy currents, significantly reducing the impact of vibrations generated during drilling on the drill pipe. The spiral direction is opposite to the direction of rotation of the drill pipe, enhancing the eddy current braking effect, reducing vibration amplitude by 20% to 30% while also reducing friction between the drill pipe and the wellbore wall. The damping ring actively reduces the impact of vibrations generated during drilling on the drill pipe.

[0035] In another technical solution, an intelligent control system is also included, which includes a cylinder control module. The opening, closing and stroke of the multiple hydraulic cylinders corresponding to the multiple clamping arms corresponding to each group of clamping modules are controlled by the cylinder control module.

[0036] The hydraulic cylinder is intelligently controlled by the cylinder control module to achieve individual control of multiple hydraulic cylinders. It can also control the hydraulic pressure of each hydraulic cylinder, thereby controlling the clamping force of the clamping arm on the drill pipe, keeping the clamping force of multiple clamping arms in all directions equal and stable.

[0037] In another technical solution, the intelligent control system also includes a deflection angle monitoring system, which includes a coordinate acquisition module, a calculation module, a judgment module and an alarm module. A total station is set on the ground, which is used to obtain the coordinates of the initial fixed point at the top of the drill pipe. A downhole inclinometer is set at the bottom of the drill pipe, which is used to obtain the real-time coordinates of the bottom of the drill pipe. The coordinate acquisition module obtains the initial fixed point coordinate data monitored by the total station and the real-time coordinate data of the bottom of the drill pipe monitored by the downhole inclinometer, and transmits them to the calculation module. The calculation module calculates the deflection angle θ in real time through the coordinates of the two points, and transmits the deflection angle to the judgment module. The judgment module determines whether the deflection angle exceeds the set warning threshold. If it exceeds, an alarm is issued through the warning module.

[0038] Ground reference coordinate measurement, using a total station to capture the coordinates of the initial fixed point on the top of the drill pipe in real time , serving as a benchmark for deflection angle calculations. Alternatively, a laser tracking system using an SP80 laser tracker (80m measurement range, 1000Hz sampling rate) can be deployed to monitor the spatial coordinates of the drill pipe top in real time to ensure benchmark accuracy. Downhole coordinates of the drill pipe bottom can be measured in real time using a while-drilling inclinometer (LWD), or a fiber-optic gyro-inertial navigation system (FIG-INS). Data from the LWD inclinometer is transmitted in real time to the coordinate acquisition module in the surface system via mud pulse signals (transmission rate 4 bps). Fiber-optic gyro-inertial navigation system (FIG-INS) and FIG-INS data integration improve downhole coordinate calculation accuracy.

[0039] The deflection angle θ is the current position of the drill pipe Fixed point on the ground The angle between the line connecting the two axes and the vertical axis (Z axis). The calculation module unifies the ground and downhole coordinate systems to eliminate the influence of azimuth and tool face angle on the calculation. Quaternion method is used for coordinate rotation to ensure calculation accuracy of ≤0.01°. The formula for calculating the deflection angle is as follows: .

[0040] The permitted deflection angles for this application are: Soft formations (e.g., sandstone and mudstone): θ ≤ 1° (equivalent to an offset of ≤ 17.5 mm / 100 m); Hard formations (e.g., granite and limestone): θ ≤ 0.5° (offset of ≤ 8.7 mm / 100 m). Warning thresholds: Soft formations: 1° < θ ≤ 1.5°; Hard formations: 0.5° < θ ≤ 0.8°.

[0041] In another technical solution, the judgment module also transmits data with the cylinder control module. When the judgment module determines that the deflection angle exceeds the set warning threshold, it calculates the adjustment amount according to the set formula and transmits the adjustment amount to the cylinder control module to control the corresponding hydraulic cylinder to adjust according to the calculated adjustment amount. , where k is the correction coefficient, which is 0.8-1.2, and ΔL is the single drilling depth; if the deviation angle θ is not greater than 0.5°, Δθ is the deviation angle; if the deviation angle θ is greater than 0.5°, Δθ is 0.5°.

[0042] When the deflection angle θ> the warning threshold, the hydraulic cylinder is started (stroke ±150mm, response time <30ms) for fine adjustment. Adjustment amount calculation: Where k is the correction factor (usually 0.8-1.2), ΔL is the single drilling depth (usually 0.1-1 meter), and Δθ is the allowable single well inclination variation (recommended ≤0.5° to avoid excessive correction). In K zone 1, ΔL is 0.8m, and the calculated inclination angle θ is 0.4°. Therefore, ΔH = 0.0056m = 5.6mm, and the control hydraulic cylinder stroke is 5.6mm.

[0043] In another technical solution, a pressure sensor is provided on the inner end face corresponding to each clamping arm and the drill rod, which is used to obtain the pressure value between the clamping arm and the drill rod and transmit it to the cylinder control module. The cylinder control module determines the maximum pressure value and controls the hydraulic cylinder corresponding to the maximum pressure value to move according to the calculated adjustment amount.

[0044] This application uses hydraulic correction combined with a mechanical structure to change the force direction of the drill bit. The pressure value transmitted by the pressure sensor of each clamping arm indicates that the clamping arm with the highest pressure has the highest pressure on it from the drill rod, which is the position that needs to be adjusted. The hydraulic cylinder corresponding to the clamping arm with the corresponding maximum pressure is adjusted according to the calculated adjustment amount to achieve the offset adjustment of the drill rod. Under normal circumstances, due to the setting of the mechanical structure, it is rare for drill rod offset to require an early warning. However, once an early warning occurs, the intelligent control system of this application can be used to perform real-time intelligent correction.

[0045] It will be understood that the present invention is described by way of some embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and embodiments. They can be fully applied to various fields suitable for the present invention, and further modifications can be easily implemented by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. An anti-drift drilling device, characterized in that: It includes a base supported on the ground and a clamping mechanism and a drilling mechanism arranged on the base. A hole for drilling downward with a drill rod is reserved in the center of the base; the drilling mechanism includes a support column vertically fixed to the base and a fixed seat fixed to the top of the support column, a drill rod is installed on the fixed seat, and a drill bit is connected to the end of the drill rod, and the drill rod is driven downward to drill by a driving device arranged on the fixed seat; the clamping mechanism includes at least two groups of clamping modules, which are both arranged between the base and the fixed seat and are used to clamp the drill rod, and the at least two groups of clamping modules are arranged at intervals up and down to form an effective constraint on the drill rod to prevent deviation.

2. The anti-drift drilling device according to claim 1, characterized in that: It also includes a guide sleeve, which is driven into and fixed to the ground. The guide sleeve is located in the hole in the center of the base. The center of the guide sleeve is vertically downward and coincides with the central axis of the borehole to be drilled by the drill rod. The guide sleeve includes an integrally formed upper part, middle part and lower part. The upper part and the lower part are both cylindrical and the inner diameter of the upper part is larger than the inner diameter of the lower part. The middle part is a frustum that connects the upper part and the lower part into one. The inner diameter of the lower cylinder is consistent with the outer diameter of the drill rod. Half of the upper part protrudes from the ground and is fixedly connected to the base.

3. The anti-drift drilling device according to claim 2, characterized in that: The base is composed of a plurality of foundation blocks, a layer of film fixing bag is laid on the ground, which is annular and located outside the guide sleeve, and the fixing bag is filled with epoxy resin to form a fixing layer with a smooth surface. The plurality of foundation blocks are arranged on the fixing layer and anchored underground. The inner end of the foundation block facing the guide sleeve is arc-shaped to fit tightly against the guide sleeve, and the plurality of foundation blocks are evenly spaced and tightly fixed to the outer wall of the guide sleeve.

4. The anti-drift drilling device according to claim 1, characterized in that: The clamping modules are arranged in two groups, forming an upper and lower layer. Each group of clamping modules includes at least three clamping arms. Each clamping arm is correspondingly provided with a hydraulic cylinder and drives the clamping arm to move closer to or away from the drill rod. The moving direction of the clamping arm passes through and is perpendicular to the central axis of the drill rod. The hydraulic cylinder is fixedly arranged on the base and the telescopic rod of the hydraulic cylinder is arranged parallel to the plane of the base. The telescopic rod of the hydraulic cylinder is fixedly connected to the clamping arm. The inner end surface of the clamping arm facing the drill rod is arranged to match the arc shape of the outer wall of the drill rod. The clamping arms corresponding to the upper and lower groups of clamping modules are evenly staggered at 30°-60° on the horizontal projection plane.

5. The anti-drift drilling device according to claim 4, characterized in that: A support rod is fixedly provided on the lower surface of the clamping arm, and its bottom end is slidably provided on the base. The base is provided with a slide rail corresponding to the moving direction of each clamping arm, which is used to cooperate with the sliding of the bottom of the support rod.

6. The anti-drift drilling device according to claim 2, characterized in that: The drill rod is evenly provided with multiple threaded ends along its vertical direction, which are formed by setting spiral grooves on the surface of the drill rod, and the spiral direction of the spiral grooves is opposite to the rotation direction of the drill rod; a shock-absorbing ring is fixedly provided on the base, and the ring is filled with polyurethane. The shock-absorbing ring is located at the top of the guide sleeve, and the inner diameter of the shock-absorbing ring is the same as the outer diameter of the drill rod.

7. The anti-drift drilling device according to claim 4, characterized in that: It also includes an intelligent control system, which includes a cylinder control module. The opening, closing and stroke of the multiple hydraulic cylinders corresponding to the multiple clamping arms corresponding to each group of clamping modules are controlled by the cylinder control module.

8. The anti-drift drilling device according to claim 7, characterized in that: The intelligent control system also includes a deflection angle monitoring system, which includes a coordinate acquisition module, a calculation module, a judgment module and an alarm module. A total station is set on the ground, which is used to obtain the coordinates of the initial fixed point at the top of the drill pipe. A downhole inclinometer is set at the bottom of the drill pipe, which is used to obtain the real-time coordinates of the bottom of the drill pipe. The coordinate acquisition module obtains the initial fixed point coordinate data monitored by the total station and the real-time coordinate data of the bottom of the drill pipe monitored by the downhole inclinometer, and transmits them to the calculation module. The calculation module calculates the deflection angle θ in real time based on the coordinates of the two points and transmits the deflection angle to the judgment module. The judgment module determines whether the deflection angle exceeds the set warning threshold. If it exceeds, an alarm is issued through the warning module.

9. The anti-drift drilling device according to claim 8, characterized in that: The judgment module also transmits data with the cylinder control module. When the judgment module determines that the deflection angle exceeds the set warning threshold, it calculates the adjustment amount according to the set formula and transmits the adjustment amount to the cylinder control module to control the corresponding hydraulic cylinder to adjust according to the calculated adjustment amount. , where k is the correction coefficient, which is 0.8-1.2, and ΔL is the single drilling depth; if the deviation angle θ is not greater than 0.5°, Δθ is the deviation angle; if the deviation angle θ is greater than 0.5°, Δθ is 0.5°.

10. The anti-drift drilling device according to claim 9, characterized in that: A pressure sensor is provided on the inner end face corresponding to each clamping arm and the drill rod, which is used to obtain the pressure value between the clamping arm and the drill rod and transmit it to the cylinder control module. The cylinder control module determines the maximum pressure value and controls the hydraulic cylinder corresponding to the maximum pressure value to move according to the calculated adjustment amount.

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