A borehole trajectory detection system and method with adjustable window opening direction in drilling casing.

Abstract

This invention relates to a borehole trajectory detection system and method with adjustable window direction in the drilling casing, belonging to the field of borehole trajectory detection technology. It includes a drill pipe and a drill bit. A lower rotation drive module is connected to the lower axial end of the drill pipe. The lower axial end of the lower rotation drive module is also connected to a deflection adjustment component that allows the probe to perform multi-position inclination data acquisition on the same tool section by changing the orientation of the probe window of the detection module. The deflection adjustment component is also connected to a non-magnetic sleeve via a non-magnetic short section. The probe is inserted into the non-magnetic sleeve through a shock-absorbing and straightening component that adaptively buffers external vibrations. The measuring unit of the probe is offsetly installed within the casing. The lower axial end of the non-magnetic sleeve is connected to the drill bit via a non-magnetic drill collar. This invention can reduce detection errors and improve the accuracy of inclination data at a given point by using the median obtained from multi-level mean calculation of multiple sets of inclination data.

Description

Technical Field

[0001] This invention relates to the field of borehole trajectory detection technology, and in particular to a borehole trajectory detection system and method that is adjustable along with the opening direction of the drilling pipe. Background Technology

[0002] The development of directional drilling technology has spurred the rapid advancement of measurement-while-drilling (MWD) tools, resulting in superior performance in data transmission rate, stability, wear resistance, variable operating frequency, vibration resistance, and smaller size. MWD technology effectively solves the problems of shallow drilling depth and uncontrollable trajectory in traditional rotary drilling techniques, representing a key technology in transforming downhole drilling from "uncontrollable trajectory" to "precise directional drilling." With the increasing depth of underground energy extraction, the number of various types of boreholes and their drilling lengths are both increasing. Understanding the actual borehole trajectory significantly improves the accuracy of advanced geological exploration.

[0003] Drilling rigs used in underground drilling can be classified into rotary and non-rotary types according to their drilling methods. Non-rotary drilling rigs are mainly directional drilling rigs. During drilling, a screw motor at the front end of the drill rod drives the drill bit to rotate and cut the rock and soil. The drill rod moves into the hole under the propulsion force of the drilling rig. Directional drilling refers to a drilling technology that uses a specialized directional drilling rig to achieve pre-set directional drilling in a controlled drilling trajectory within a drilling area, thereby reaching a predetermined position. Directional drilling has advantages such as fast construction speed, high accuracy, and low cost, and is widely used in oil drilling, geological exploration, and trenchless pipeline laying. Currently, the main fields using measurement-while-drilling (MWD) systems are oil drilling and coal mine drilling. In the oil drilling field, wireless MWD systems are more commonly used, primarily employing mud pulses as the signal transmission method, and the corresponding technology is relatively mature.

[0004] For example, patent document CN109581522B discloses a probe-type azimuth gamma probe and measurement method for a drilling rig, including an outer protective cylinder and a copper connector threaded to the outer protective cylinder, as well as a centering rubber sleeve, a gamma ray probe, a gamma shielding device, an embedded microprocessor system mounting frame, a high-voltage power supply, three gravity acceleration sensors, a temperature sensor, a shock absorber, and an embedded microprocessor system. This device can reduce costs by simplifying the structure while ensuring detection accuracy.

[0005] However, the probe of this device performs directional gamma detection based on a fixed window to determine the position of the probe-type azimuth gamma in the formation space, resulting in the limited coordinate data collected from a single formation point. Furthermore, because the borehole diameter is slightly larger than the drill string assembly diameter, and because the borehole medium forming the borehole wall varies in hardness across different regions, the drill string will exhibit some tilting and deviation. This causes variations in the tilting posture of the drill string during rotation at a constant formation depth, meaning there is a certain degree of tilt redundancy between the drill string and the borehole. Additionally, the borehole is not perfectly regular, leading to some swaying space between the drill pipe and the probe, meaning the drill pipe is prone to deviation from the actual centerline of the borehole. This results in highly erroneous single-set inclination data, such as the borehole inclination, collected by the inclination probe, making it impossible to improve the accuracy of the inclination data through multi-data integration. Consequently, a significant deviation occurs between the borehole trajectory and the designed trajectory, reducing drilling efficiency, accuracy, and safety. In addition, existing drilling exploration equipment lacks a probe damping and positioning structure. It usually uses a stabilizer with damping pads for positioning, which has a general buffering and damping capacity and a short fatigue life. It cannot effectively adapt to the constantly changing vibration and impact forces during drilling, which can easily lead to a shortened life of the probe after being subjected to vibration and impact, thus reducing the durability of the probe. Summary of the Invention

[0006] The purpose of this invention is to provide a borehole trajectory detection system with adjustable window opening direction for the drilling pipe. This system can acquire multiple sets of differential inclination data at the same formation depth by changing the orientation of the detection window. The median value obtained by multi-level averaging of these multiple sets of inclination data can then be used to reduce detection errors and improve the accuracy of the inclination data at that point. This addresses the problems of existing drilling rigs where the window opening direction is usually fixed, resulting in only one set of inclination data being collected at a single underground point. Furthermore, due to the degree of inclination redundancy between the drill pipe and the borehole, the single set of inclination data is prone to deviation from the actual borehole trajectory, leading to poor accuracy of the collected inclination data and affecting drilling efficiency, quality, and safety. Additionally, existing drilling rigs lack a support and positioning structure capable of adjusting the buffering and shock absorption intensity based on the impact intensity of the drilling fluid, resulting in poor equipment shock absorption and shortened pipe life.

[0007] The technical solution adopted in this invention is as follows: a borehole trajectory detection system with adjustable window opening direction along the drilling pipe, comprising a drill rod and a drill bit. The lower axial end of the drill rod is connected to a lower rotary drive module via a structural bend joint. The lower axial end of the lower rotary drive module is also rotatably connected to a deflection adjustment component that allows the probe to perform multi-position inclination data acquisition on the same tool section by changing the orientation of the probe window of the detection module. The deflection adjustment component is also connected to a non-magnetic sleeve fitted on the probe by a non-magnetic short joint. The probe is coaxially inserted into the non-magnetic sleeve via an anti-vibration straightening component that can adaptively buffer external vibrations and impacts. The measuring unit of the probe is offset and installed in the casing by offsetting from the central axis of the casing. The lower axial end of the non-magnetic sleeve is connected to the drill bit via a non-magnetic drill collar. Its advantage lies in the fact that the detection module set up in this application can intermittently deflect under the drive of the deflection adjustment component by eccentrically arranging the measurement units. This allows for the acquisition of multiple sets of inclination data with different detection window orientations and acquisition points during the detection period when drilling stops. By performing multiple median processing of the inclination data, the accuracy of the inclination data is improved. This effectively eliminates the drill string deviation caused by the redundant gap between the drill string and the borehole, as well as the measurement deviation caused by eccentric installation. It obtains the three-dimensional coordinates and inclination parameters of the drill string attitude at the actual borehole location on the tool cross section, which are close to the actual borehole location. This allows the ground analysis end to more accurately control the overlap between the measured trajectory and the designed trajectory of the borehole, facilitating high-precision adjustment of the actual trajectory during subsequent drilling and enabling subsequent borehole trajectory control. The anti-vibration straightening component in this application can adjust its buffering and shock-absorbing strength according to the pressure changes of the drilling fluid. This allows it to adaptively reduce the vibration impact transmitted from the drilling fluid and non-magnetic casing to the probe, improving the adaptive adjustment capability of the anti-vibration straightening component when subjected to changes in external vibration impact. It effectively buffers vibration impact, reducing the impact damage rate of precision components such as sensors inside the probe to a certain extent, and improving service life and durability. This application also reduces the deviation between the collected data and the actual borehole conditions by performing multi-level median calculations on multiple sets of inclination measurement data collected by the measurement unit at the same drilling depth. This improves the accuracy of the detection results, ensuring that the actual drilling trajectory effectively coincides with the designed trajectory, thereby improving drilling efficiency and safety.

[0008] According to a preferred embodiment, the deflection drive unit of the deflection adjustment assembly is fitted with a first sleeve and a third sleeve coaxially arranged, thereby forming an annular gap between the first sleeve and the third sleeve for the movable insertion of a second sleeve. A deflection transmission disk and a locking mounting base are axially spaced within the second sleeve, which is coaxially connected to the upper axial end of the non-magnetic sleeve. A deflection transmission shaft, which is driven by the output end of the deflection drive unit, movably passes through the deflection transmission disk and the locking mounting base. The deflection transmission shaft adjusts the working posture of the linkage locking component assembly mounted on the locking mounting base by axial lifting, enabling the linkage locking component assembly to limit the insertion and fitting position of the first sleeve and the second sleeve. Its advantage lies in that the deflection adjustment assembly can change its structural form according to requirements to adapt to different working conditions, thereby realizing the transmission of drilling rotational force or deflection drive during the detection period. It achieves switching between rotation and deflection postures through simple up and down movement, improving the convenience of working condition adjustment.

[0009] According to a preferred embodiment, the deflection drive unit is installed inside the third sleeve via a porous conductive ring plate fitted onto its main body, and the surface of the porous conductive ring plate is also connected to the first sleeve; a correction clamping arc plate is embedded in the tube wall of the first sleeve in a circumferentially spaced manner.

[0010] According to a preferred embodiment, the second sleeve includes a coaxial inner tube, a coaxial outer tube, and a connecting crossbar disposed in the annular gap between the two in a manner that can position the coaxial inner tube and the coaxial outer tube in a coaxial insert state. A positioning ring plate is provided on the inner tube wall of the coaxial inner tube, which can define a locking groove that is adapted to the correction locking arc plate.

[0011] According to a preferred embodiment, a plurality of round-headed transmission clips are arranged circumferentially on the deflection drive shaft; a sleeve fitted on the deflection drive shaft is inserted centrally on the deflection drive disc, and an flared limiting groove capable of accommodating the round-headed transmission clips is formed on the inner wall of the sleeve in a rotationally symmetrical manner.

[0012] According to a preferred embodiment, the linkage locking component assembly includes a U-shaped guide block circumferentially spaced on the locking mounting chassis, a transverse locking insert that slides through the through slot cavity formed by the U-shaped guide block and the locking mounting chassis, and a linkage ramp block disposed at the proximal end of the transverse locking insert; the bottom end of the deflection drive shaft is also provided with a frustum head that can push the linkage ramp block to move laterally during its descent.

[0013] According to a preferred embodiment, the upper support bar and radial damping mechanism of the seismic straightening component are evenly and circumferentially spaced on the outer wall of the tube shell, and the lower support bar of the seismic straightening component is circumferentially spaced on the inner wall of the tube of the non-magnetic sleeve. An axial damping member is hinged to the lower support bar, and the end of the axial damping member away from the lower support bar is hinged to the bottom surface of the upper support bar. A pressure-adjusting mechanism capable of changing the initial working state of the radial damping mechanism and the axial damping member is also provided on the upper support bar.

[0014] According to a preferred embodiment, the horizontal groove of the radial damping mechanism is filled with a radial buffer airbag, and the pressing vertical plate of the lower support bar abuts against the side surface of the radial buffer airbag by slidingly inserting into the horizontal groove.

[0015] According to a preferred embodiment, the pressure-adjusting mechanism includes a cylinder mounted on the upper support bar, a lifting connecting rod inserted into the cylinder, a follow-up adjusting piston mounted on the lifting connecting rod, an oil supply pipeline connecting the cylinder and the axial damping component, and a pressure-receiving lifting arc plate and a pressure-adjusting plate respectively mounted at the top and bottom of the lifting connecting rod.

[0016] The present invention also provides a borehole trajectory detection method that is adjustable according to the opening direction of the drill pipe, including the borehole trajectory detection system described above, and further including the following steps:

[0017] S1. Lift the drill pipe, causing the lower rotation drive module and deflection adjustment component at the lower end of the drill pipe to move upward synchronously, changing the working posture of the deflection adjustment component, so that the upward deflection transmission shaft releases the locking limitation on the linkage locking component group and engages with the deflection transmission disc insert sleeve to form a deflection transmission structure.

[0018] S2. The deflection drive unit drives the deflection transmission shaft to deflect in a directional and equal manner, which drives the deflection transmission disk to rotate, thereby driving the second sleeve and the detection module connected to it to deflect synchronously.

[0019] S3. The probe of the detection module is synchronously deflected to the target azimuth angle, and the inclination data of the current position is collected by the measurement unit installed in the probe.

[0020] S4. Repeat steps S2-S3 so that the measuring unit installed offset inside the probe can sequentially collect multi-position inclination data on the same tool section, thereby covering the preset circumferential angle range, so that the processing unit of the probe can obtain the mean inclination data of the center point through multi-level median calculation.

[0021] S5. Lower the drill pipe, causing the deflection drive shaft to move down synchronously, pushing the linkage locking assembly to form a locking and limiting structure in a way that restricts the relative rotation of the first casing and the second casing, thus restoring the drilling posture.

[0022] The beneficial effects of this invention are:

[0023] The detection module in this application uses an eccentrically arranged measurement unit to intermittently deflect under the drive of the deflection adjustment component. During the detection period when drilling stops, it collects multiple sets of inclination data with different detection window orientations and different collection points. By performing multiple median processing on the inclination data, the accuracy of the inclination data is improved. This effectively eliminates the drill string deviation caused by the redundant gap between the drill string and the borehole, as well as the measurement deviation caused by eccentric installation. It obtains the three-dimensional coordinates and inclination parameters of the actual borehole location at the tool cross-section, which are close to the borehole. This allows the ground analysis end to more accurately control the overlap between the measured borehole trajectory and the designed trajectory, facilitating high-precision adjustment of the actual trajectory during subsequent drilling and enabling subsequent borehole trajectory control.

[0024] The deflection adjustment component provided in this application can adjust the working conditions during the drilling and exploration stages by lifting and lowering operations as needed. It can selectively transmit drilling rotation or act as a deflection drive source. It can collect high-precision borehole trajectory data without lifting the drill bit, so that the drill bit can accurately drill along the preset trajectory, making the actual borehole trajectory coincide with the design trajectory, thereby improving the accuracy, quality and safety of drilling.

[0025] The anti-vibration straightening component provided in this application can adjust its buffering and shock-absorbing strength according to the pressure changes of the drilling fluid, so that it can adaptively reduce the vibration impact transmitted from the drilling fluid and non-magnetic casing to the probe. This improves the adaptive adjustment capability of the anti-vibration straightening component when subjected to changes in external vibration impact, and achieves effective buffering of vibration impact. To a certain extent, it reduces the impact damage rate of precision devices such as sensors in the probe, and improves service life and durability.

[0026] This application reduces the deviation between the collected data and the actual borehole conditions by performing multi-level median calculations on multiple sets of inclination measurement data collected by the measurement unit at the same drilling depth, thereby improving the accuracy of the detection results and enabling the actual drilling trajectory to effectively coincide with the design trajectory, thus improving drilling efficiency and safety. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a preferred borehole trajectory detection system with adjustable window opening direction proposed in this invention.

[0028] Figure 2This is an axial cross-sectional schematic diagram of a preferred borehole trajectory detection system with adjustable window opening direction proposed in this invention.

[0029] Figure 3 The present invention proposes a preferred borehole trajectory detection system with adjustable window opening direction in the drilling pipe. Figure 2 A schematic diagram of the cross-section at point AA;

[0030] Figure 4 The present invention proposes a preferred borehole trajectory detection system with adjustable window opening direction in the drilling pipe. Figure 3 A schematic diagram of the axial section at point BB;

[0031] Figure 5 The present invention proposes a preferred borehole trajectory detection system with adjustable window opening direction in the drilling pipe. Figure 4 A schematic diagram of the cross-section at point C;

[0032] Figure 6 This is a schematic diagram of the outer wall of the first casing of a preferred borehole trajectory detection system with adjustable window opening direction proposed in this invention.

[0033] Figure 7 This is a schematic diagram of the inner wall of the coaxial inner tube of a preferred borehole trajectory detection system with adjustable window opening direction proposed in this invention.

[0034] Figure 8 This is a schematic diagram of the axial cross-section of the probe of a preferred borehole trajectory detection system with adjustable window opening direction proposed in this invention.

[0035] Figure 9 This is an axial cross-sectional view of the anti-seismic straightening component of a preferred borehole trajectory detection system with adjustable window opening direction proposed in this invention.

[0036] Figure 10 This is a partial lateral planar schematic diagram of the seismic straightening component of a preferred borehole trajectory detection system with adjustable window opening direction proposed in this invention.

[0037] List of reference numerals

[0038] 1: Drill pipe; 2: Drill bit; 3: Detection module; 4: Deflection adjustment assembly; 5: Non-magnetic short section; 6: Seismic straightening assembly; 7: Non-magnetic drill collar; 8: Lower rotation drive module; 11: Structural bend joint; 31: Probe tube; 32: Non-magnetic sleeve; 311: Measurement unit; 312: Tube shell; 313: Processing unit; 41: Deflection drive unit; 42: First sleeve; 43: Second sleeve; 44: Third sleeve; 45: Deflection drive shaft; 46: Deflection drive disc; 47: Locking mounting chassis; 48: Linkage locking assembly; 411: Multi-hole conductive ring plate; 421: Correction locking arc plate; 422: First sealing gasket; 431: Coaxial inner tube; 432: Coaxial outer tube; 433: Connecting crossbar; 434: Positioning ring plate; 435: Second sealing gasket; 451: Round head transmission locking strip; 452: Frustum shaft head; 461: Sleeve; 462: Flared limiting locking groove; 481: U-shaped guide block; 482: Horizontal positioning insert; 483: Linkage ramp block; 61: Upper support bar; 62: Radial damping mechanism; 63: Lower support bar; 64: Axial damping component; 65: Pressure adjusting mechanism; 611: Side shielding plate; 621: Horizontal groove; 622: Radial buffer airbag; 631: Side connecting vertical plate; 632: Lower horizontal plate; 633: Pressing vertical plate; 651: Cylinder column; 652: Lifting connecting rod; 653: Follow-up adjusting piston; 654: Oil pipeline; 655: Pressure-bearing lifting arc plate; 656: Pressure adjusting plate. Detailed Implementation

[0039] The following is a detailed explanation with reference to the accompanying drawings.

[0040] This application provides a borehole trajectory detection system with adjustable window opening direction along the drilling pipe, which includes a drill rod 1, a drill bit 2, a detection module 3, a deflection adjustment component 4, a non-magnetic short section 5, an anti-vibration straightening component 6, a non-magnetic drill collar 7, and a lower rotation drive module 8.

[0041] according to Figures 1-10In one specific embodiment, the lower axial end of the drill pipe 1 is connected to the guide sleeve shell of the lower rotary drive module 8 via a structural bend joint 11, facilitating the construction of a drilling trajectory capable of turning and exhibiting inclination. The lower axial end of the lower rotary drive module 8 is also rotatably connected to a deflection adjustment component 4, which allows the probe 31 of the detection module 3 to collect multi-position inclination measurement data at different azimuth angles along the same tool section by changing the orientation of the detection window. The probe 31 can perform multi-level median calculations on multiple sets of inclination measurement data collected from multiple directional equal-amount deflections at the same drilling section position, obtaining trajectory data close to the actual drilling situation. This facilitates the use of the final output data to reduce the error of the collected drill bit attitude parameters, making the drill bit attitude parameters more accurately match the actual drilling trajectory. This allows for more precise correction of the measured drilling trajectory during subsequent drilling, ensuring the overlap between the measured trajectory and the designed trajectory. The deflection adjustment assembly 4 is also connected to the non-magnetic sleeve 32, which is mounted on the probe 31, via a non-magnetic short section 5. The probe 31 is coaxially inserted into the non-magnetic sleeve 32 via an anti-vibration straightening assembly 6, which adaptively buffers the vibration impact transmitted to it by the drilling fluid outside and the non-magnetic sleeve 32. The measuring unit 311 of the probe 31 is offset within the casing 312 such that its calibration point for acquiring three-dimensional spatial coordinate data does not coincide with and deviates from the central axis of the casing 312. The lower axial end of the non-magnetic sleeve 32 is connected to the drill bit 2 via a non-magnetic drill collar 7. The detection module 3 in this application, through the eccentric arrangement of the measurement unit 311, can intermittently deflect under the drive of the deflection adjustment component 4. During the detection period when drilling stops, it collects multiple sets of inclination data with different detection window orientations and different collection points. By performing multiple median processing on the inclination data, the accuracy of the inclination data is improved, effectively eliminating the drill bit deviation caused by the redundant gap between the drill bit and the borehole, as well as the measurement deviation caused by the eccentric installation. It obtains the three-dimensional coordinates and inclination parameters of the actual borehole track point at the tool cross section, which are close to the borehole. This allows the ground analysis end to more accurately control the overlap between the measured trajectory and the designed trajectory of the borehole, facilitating high-precision adjustment of the actual trajectory during subsequent drilling and making it easier to implement subsequent borehole trajectory control. The deflection adjustment component 4 provided in this application can adjust the working conditions by lifting and lowering during the drilling and exploration stages as needed. It can selectively transmit drilling rotation or act as a deflection drive source. It can collect high-precision borehole trajectory data without lifting the drill bit, so that the drill bit can accurately drill along the preset trajectory, making the actual borehole trajectory coincide with the design trajectory, thereby improving the accuracy, quality and safety of drilling.The anti-vibration straightening component 6 provided in this application can adjust its buffering and shock-absorbing intensity according to the pressure change of the drilling fluid, so that it can adaptively reduce the vibration impact transmitted from the drilling fluid and the non-magnetic casing 32 to the probe 31, improve the adaptive adjustment capability of the anti-vibration straightening component 6 when subjected to external vibration impact changes, realize effective buffering of vibration impact, reduce the impact damage speed of precision devices such as sensors in the probe 31 to a certain extent, and improve service life and durability.

[0042] Preferably, the drill rod 1 is composed of multiple straight tubular sections of equal length, and the end of the drill rod 1 extending to the ground is connected to the drilling propulsion module, thereby forcing it to selectively transmit drilling thrust and / or a certain intensity of rotational driving force to the drill bit 2. Preferably, the tubular sections of the drill rod 1 can be assembled using structures such as connecting pipe joints, and its lowest structural bend joint 11 has a deflection of 1-1.5°. More preferably, the multiple tubular sections constituting the drill rod 1 can also be connected using structural bend joints 11, and the cooperation of multiple structural bend joints 11 enables large-angle inclined drilling, facilitating the acquisition of boreholes with large inclination angles.

[0043] like Figure 8 and Figure 9As shown, the probe 31 is coaxially inserted into the non-magnetic casing 32 via an anti-vibration straightening assembly 6 that adaptively buffers the vibration impact transmitted to it by the drilling fluid and the non-magnetic casing 32. The probe 31 can measure drill string attitude parameters, including azimuth, inclination, and tool face angle. Based on these data, the three-dimensional coordinates of each measuring point in the borehole coordinate system are determined, thereby obtaining the measured borehole trajectory diagram. The deviation between the measured trajectory and the designed trajectory is observed, facilitating subsequent borehole trajectory control. The anti-vibration straightening assembly 6 can not only position the probe 31 in the non-magnetic casing 32 but also reduce the vibration force transmitted by the probe 31 during drilling, mitigating the impact of the vibration force on the probe 31. Preferably, the measuring unit 311 of the probe 31 is offset within the casing 312 such that the calibration point for acquiring three-dimensional spatial coordinate data does not coincide with and deviates from the central axis of the casing 312. When the axis of the casing 312 is aligned with the center line of the drilling trajectory, the axis of the measuring unit 311 does not coincide with the center line of the drilling trajectory. When the measuring unit 311 deflects with the casing 312, the inclination data collected by the measuring unit 311 at different deflection angles will have certain deviations. Furthermore, the coordinate parameters of the two sets of data collected by the measuring unit 311 at two workstations with a deflection angle difference of 180° are approximately symmetrical in three-dimensional space with respect to the intersection of the center line of the drilling trajectory and the tool section. The coordinate information and other parameters of the two sets of data after median processing indicate that the points are close to or coincide with the center line of the drilling trajectory. Specifically, when collecting inclination data from multiple workstations at the same tool cross section, rotational positioning control is achieved through the deflection adjustment component 4, enabling the measurement unit 311 to collect multiple sets of tilt angles and azimuth angles at different azimuth angles. Combined with the averaging algorithm of the processing unit 313, the inclination data from multiple workstations is fused and processed, effectively reducing the drill bit deviation caused by the redundant gap between the drill bit and the borehole, as well as the measurement deviation caused by eccentric installation, thereby achieving high-precision dynamic inversion and real-time positioning of the borehole trajectory.

[0044] Preferably, the measurement unit 311 adopts a tilt measurement scheme based on magnetoresistive sensors and accelerometers. Its measurement principle involves obtaining the triaxial components of the geomagnetic and gravitational fields of the drill bit in any orientation using a triaxial magnetoresistive sensor and a triaxial accelerometer fixed to the tilt measurement probe inside the drill bit. The triaxial component measurement of the gravitational field determines the dip angle and tool face angle, while the combined measurements of the triaxial components of the geomagnetic and gravitational fields determine the azimuth angle. Preferably, the processing unit 313 is a heterogeneous processor or multi-core DSP processor capable of averaging and optimizing spatial data such as three-dimensional coordinates through AI + parallel computing fusion. Vacuum sealing is designed in the probe 31, utilizing advanced vacuum sealing technology to effectively seal all components of the probe 31. This improves seismic resistance to a certain extent while preventing water and sand ingress into the probe 31, effectively extending its service life and enabling long-term stable operation in harsh environments.

[0045] The detection window refers to the tungsten-nickel alloy shielding shell window designed on the casing 312. The window width is usually set to 90 degrees. The method of opening the detection window in this application is the same as the traditional window opening scheme, which is a fixed window. However, this application changes the orientation of the window by driving the detection module 3 to deflect during the drilling stop period through the deflection adjustment component 4, so that the detection module 3 can collect multiple sets of inclination data with different azimuth measurement bases. Specifically, when the detection window rotates with the casing 312, the inclination measurement data is paired by acquiring data from two points. That is, the detection window acquires a complex number of datasets at multiple positions with different orientations. The two sets of inclination measurement data acquired at two positions with opposite orientations of the detection window serve as a pair of base data that can be used for median calculation. The median inclination measurement data obtained by processing these two sets of inclination measurement data is close to the three-dimensional coordinates and inclination parameters of the actual borehole location at the tool section. This achieves reduced deviation and more accurate acquisition of drill bit attitude parameters, enabling the ground analysis end to more accurately control the overlap between the measured borehole trajectory and the design trajectory. This facilitates high-precision adjustment of the actual trajectory during subsequent drilling, ensuring that the borehole path coincides with the design trajectory.

[0046] The tool section refers to the borehole cross-section where the probe end of probe tube 31 is considered as a point mass. The probe module 3 and drill rod 1 are approximately aligned with the borehole axis. In this case, the inclination data of probe module 3 is approximately the actual coordinates and inclination of the borehole at that point in the formation. When probe module 3 deflects, its theoretical depth in the formation does not change. Therefore, the specific position of the probe end of probe module 3 only changes within the tool section. In particular, when probe module 3 deflects, its data is collected in pairs. That is, during its 360° circular rotation, the multiple sets of inclination data collected after multiple deflections are all even numbers. This makes the coordinate data contained in any two sets of inclination data with a deflection angle difference of 180° approximately symmetrical with respect to the intersection of the borehole axis and the tool section.

[0047] The azimuth line refers to the line with the north-facing line of the tool cross-section as the 0° coordinate line. When the detection module 3 deflects, the angle between the line connecting the detection window and the center of rotation and the 0° line is the deflection angle. At this time, the line connecting the detection window and the center of rotation is the azimuth line. For example, if the tool cross-section is regarded as a circular surface, the angle between the radius line of the deflected detection window and the north-facing 0° line is the deflection angle, and the radius line containing it is an azimuth line. Several azimuth lines distributed at equal angles can divide the circular surface representing the tool cross-section into multiple equal parts, and the number of segments divided is even.

[0048] Multi-station inclination data acquisition refers to the fact that during the aforementioned deflection process, the orientation of the detection window and the actual detection station of the detection module 3 change after each quantitative deflection, resulting in differences in the acquired data. This enables the acquisition of multiple sets of inclination data, facilitating multi-level averaging calculations using these differing sets of inclination data. This allows for the acquisition of drill string attitude parameters that more closely approximate the borehole trajectory parameters at the tool face. By outputting drill string attitude parameters such as azimuth, inclination, and tool face angle, the ground data receiving system can determine the three-dimensional coordinates of each measuring point in the borehole coordinate system, thereby obtaining the measured borehole trajectory diagram. This allows for observation of the deviation between the measured trajectory and the designed trajectory, facilitating subsequent borehole trajectory control.

[0049] The calibration point refers to the relative position of the probe point represented by the measuring unit 311 in the casing 312 when the measuring unit 311 is regarded as a probe point. That is, when the measuring unit 311 is used as a signal measuring point for the sensor to collect data, the three-dimensional spatial coordinates of the measuring point are the three-dimensional spatial coordinates of the probe module 3 in the borehole.

[0050] Multi-level median calculation refers to the process where the detection module 3 collects multiple sets of inclination data with differences from different work positions during the same time period. After performing median processing on each pair of data, the resulting medians still show some differences, but the numerical differences are small. The coordinate parameters in multiple median data are close to the coordinates of points on the actual borehole trajectory centerline. By performing secondary mean calculation on the median data, the data from multiple sets are fused, which effectively reduces measurement deviation and errors in the representation of individual data. This increases the consistency between the calculated final data and the actual underground conditions of the borehole and drilling tools, improves the accuracy of the output inclination data, and achieves higher precision in representing the drilling tool attitude and acquiring the borehole trajectory, making it easier to more accurately control the drilling direction and path of the drilling tools.

[0051] The measured trajectory refers to the borehole trajectory obtained through data measurement and plotting. The designed trajectory, on the other hand, refers to an ideal trajectory pre-designed based on an understanding of geographical and geological conditions before the start of the drilling task. The purpose of borehole trajectory control is to continuously adjust the actual trajectory to make it as close as possible to the designed trajectory. The measured trajectory is composed of numerous measuring points connected sequentially. These measuring points generally refer to the spatial positions of the probe pipe measured by a measurement-while-drilling device after each section of drill pipe 1 has been drilled. Due to the limited number of measuring points, there is actually a certain deviation between the measured borehole trajectory and the actual borehole trajectory. Therefore, this application improves the accuracy of measuring point calibration by increasing the precision of the data collected at each measuring point location, reducing the impact of deviation, and improving the overlap between the measured trajectory and the designed trajectory.

[0052] like Figure 2 and Figure 4As shown, the deflection adjustment assembly 4 includes a deflection drive unit 41, a first sleeve 42, a second sleeve 43, a third sleeve 44, a deflection transmission shaft 45, a deflection transmission disc 46, a locking mounting base 47, and a linkage locking assembly 48. Preferably, the first sleeve 42 and the third sleeve 44 are coaxially arranged and fitted on the outer side of the deflection drive unit 41 of the deflection adjustment assembly 4, forming an annular gap between the first sleeve 42 and the third sleeve 44 for the movable insertion of the second sleeve 43. Preferably, the deflection transmission disc 46 and the locking mounting base 47 are axially spaced within the second sleeve 43, which is coaxially connected to the upper axial end of the non-magnetic sleeve 32. More preferably, the deflection drive shaft 45, which is driven by the output end of the deflection drive unit 41, movably passes through the deflection drive disk 46 and the locking mounting chassis 47. The deflection drive shaft 45 adjusts the working posture of the linkage locking assembly 48 mounted on the locking mounting chassis 47 by axial lifting, allowing the linkage locking assembly 48 to define the insertion and fitting positions of the first sleeve 42 and the second sleeve 43. The deflection drive unit 41 provided in this application can intermittently deflect at a preset angle during drilling stop detection periods as needed, positioning multiple equally spaced detection positions within a rotational circumference. When the deflection drive shaft 45 is raised, it can engage with the deflection drive disk 46 to form a deflection drive structure; when the deflection drive shaft 45 is lowered, it can adjust the working posture of the linkage locking assembly 48, allowing the linkage locking assembly 48 to assist in defining the insertion state of the first sleeve 42 and the second sleeve 43, preventing relative rotation between them and realizing the transmission of drilling rotational power.

[0053] Preferably, both the deflection drive disk 46 and the locking mounting chassis 47 are non-complete circular structure components, with their disk edges exhibiting spaced notches to provide a spatial channel for the axial passage of the correction mounting arc plate 421. Furthermore, the spaced outward convex edge of the deflection drive disk 46 is fixedly connected to the inner wall of the coaxial inner tube 431 of the second sleeve 43; and the spaced outward convex edge of the locking mounting chassis 47 is fixedly connected to the inner wall of the locking ring plate 434 of the second sleeve 43.

[0054] Preferably, the deflection drive unit 41 is installed inside the third sleeve 44 via a porous conductive ring plate 411 fitted onto its main body. More preferably, a first sleeve 42 is also connected to the surface of the porous conductive ring plate 411. More preferably, the first sleeve 42 has two sections, wherein the lower section below the porous conductive ring plate 411 is rotatably connected to the second sleeve 43 to form a relatively rotatable isolation shell structure; the upper section above the porous conductive ring plate 411 is securely connected to the drilling drive shaft of the lower rotary drive module 8 to realize the transmission of drilling rotary driving force. Preferably, the deflection drive unit 41 includes a deflection motor, a battery, and a turbine generator arranged sequentially from bottom to top, wherein the deflection motor is connected to the output terminal of the battery through an output circuit, and the turbine generator is connected to the input terminal of the battery through an input circuit. Specifically, the battery or battery pack should meet the requirements of 7.4 in GB3836.4-2010; the battery or battery pack should be placed in an independent battery compartment; the rated energy of the battery pack should not exceed 100Wh; it should have single-cell overcharge protection, single-cell overdischarge protection, charging overcurrent protection (if the charger has charging overcurrent protection, the device itself may not have this function), discharging overcurrent protection, and output short-circuit protection. Preferably, the power supply can be a 32650 / 10Ah lithium iron phosphate battery pack with a rated output voltage of 6.4V. To meet the explosion-proof design requirements, the output terminal of the battery pack is equipped with a first-stage voltage regulation protection circuit composed of MIC29152 chips and a two-stage current limiting protection circuit composed of MAX14571 chips. This circuit has functions such as overdischarge voltage protection, discharging overcurrent protection, output short-circuit protection, and short-circuit self-recovery. In the design, the protection circuit and the battery pack are encapsulated together in an independent battery tube according to the specified requirements. Preferably, a porous conductive ring plate 411 is fitted onto the outer side of the deflection motor body via a ring weld. More preferably, the porous conductive ring plate 411 is also connected to the inner wall of the third sleeve 44 via a ring weld. Specifically, the surface of the porous conductive ring plate 411 is perpendicular to the axis of the third sleeve 44.

[0055] like Figure 6As shown, a correction-fitting arc plate 421 is embedded in the wall of the first sleeve 42 at circumferential intervals. Preferably, a first sealing gasket 422 capable of achieving rotational isolation between the first sleeve 42 and the coaxial inner tube 431 is also embedded in the outer wall of the first sleeve 42. Preferably, the top end of the first sleeve 42 is fixed to the bottom surface of the porous conductive ring plate 411 by welding a ring weld. Preferably, the correction-fitting arc plate 421 is integrally formed with the first sleeve 42, and the correction-fitting arc plate 421 is formed by protruding outwards from the wall of the first sleeve 42. More preferably, a through slot adapted to the linkage positioning component assembly 48 is provided on the correction mounting arc plate 421. When the first sleeve 42 moves down, the length of the coaxial inner tube 431 of the first sleeve 42 and the second sleeve 43 increases. The relative rotation of the two is restricted by the locking cooperation between the correction mounting arc plate 421 and the positioning ring plate 434. At this time, the end of the linkage positioning component assembly 48 is inserted into the through slot, which further improves the stability of the sleeve connection and avoids relative rotation, so that the drilling thrust and drilling deflection provided by the drill pipe 1 can be effectively transmitted.

[0056] like Figure 3 and Figure 5 As shown, the second sleeve 43 includes a coaxial inner tube 431, a coaxial outer tube 432, and several connecting crossbars 433 arranged in the annular gap between the coaxial inner tube 431 and the coaxial outer tube 432 in a coaxial insertion state capable of positioning the coaxial inner tube 431 and the coaxial outer tube 432. Figure 7 As shown, a positioning ring plate 434 is provided on the inner wall of the coaxial inner tube 431, which defines a locking groove that is adapted to the correction locking arc plate 421. More preferably, a second sealing gasket 435 is also nested on the outer wall of the coaxial outer tube 432, which can realize rotational isolation between it and the third sleeve 44. Preferably, the two ends of the connecting crossbar 433 can be connected to the outer wall surface of the coaxial inner tube 431 and the inner wall surface of the coaxial outer tube 432 respectively by welding. Preferably, the upper axial edge of the positioning ring plate 434 can form a ring tooth groove profile, and the axially downward-moving correction locking arc plate 421 is adapted and locked into the groove cavity defined by the positioning ring plate 434 in an adaptive correction relative position manner. The coaxial inner tubes 431 of the first sleeve 42 and the second sleeve 43 can be locked and connected when the drill pipe 1 is lowered, thereby restricting the relative rotation of the two and enabling them to stably transmit drilling rotational force. The second casing 43 in this application adopts a double-layered gap tube structure, forming a flow channel for the directional delivery of drilling fluid. The double-layered gap tube structure in this application ensures structural stability and separates the flow by arranging several connecting crossbars 433 in an array within the annular cavity. Preferably, the connecting crossbars 433 have a streamlined, rhomboid axial cross section, reducing friction and resistance as the drilling fluid passes through, minimizing fluid pressure loss, and improving the smoothness of directional fluid delivery.

[0057] The sealing ring accessories such as the first sealing gasket 422 and the second sealing gasket 435 provided in this application adopt the O-ring waterproof design. The O-ring waterproof design consists of two-stage sealing: a primary end seal and a primary shaft seal. The sealing ring is made of fluororubber material, and the test probe can withstand 15MPa water pressure in the water pressure test well.

[0058] like Figure 5 As shown, the deflection drive shaft 45 is connected to the output shaft of the deflection motor of the deflection drive unit 41 via a coupling. More preferably, a plurality of round-headed transmission clips 451 parallel to its axis are arranged circumferentially on the shaft of the deflection drive shaft 45. Preferably, the bottom end of the deflection drive shaft 45 is also provided with a frustum-shaped shaft head 452 capable of pushing the linkage ramp block 483 to move laterally during its descent.

[0059] like Figure 5 As shown, a sleeve 461, which is fitted onto the deflection drive shaft 45, is centrally inserted into the deflection drive disk 46. More preferably, a flared limiting groove 462, capable of accommodating a round-headed drive bar 451, is formed on the inner wall of the sleeve 461 in a rotationally symmetrical manner. When the deflection drive shaft 45 moves upward, the round-headed drive bar 451 adaptably engages in the flared limiting groove 462 of the sleeve 461, restricting the relative rotation between the deflection drive disk 46 and the deflection drive shaft 45. Consequently, the deflection drive shaft 45, driven by the deflection drive unit 41, can transmit deflection motion outward through the deflection drive disk 46.

[0060] Preferably, the locking mounting chassis 47 is connected to the inner wall of the locking ring plate 434 via a plurality of rotationally symmetrical connecting legs. Preferably, a through hole for the deflection drive shaft 45 to pass through is centrally located on the chassis of the locking mounting chassis 47.

[0061] Preferably, the linkage locking component assembly 48 includes a U-shaped guide block 481 circumferentially spaced on the locking mounting base 47, a horizontal locking insert 482 that is radially parallel to the locking mounting base 47 and slides through the through slot cavity formed by the U-shaped guide block 481 and the locking mounting base 47, and has a rectangular axial cross-section, and a linkage ramp block 483 disposed at the proximal end of the horizontal locking insert 482. Preferably, the proximal end refers to the end near the central axis of the second sleeve 43. Preferably, a reset elastic element is fitted on the bar of the horizontal locking insert 482 between the U-shaped guide block 481 and the linkage ramp block 483. More preferably, the bar of the horizontal locking insert 482 between the U-shaped guide block 481 and the linkage ramp block 483 can be set as a cylinder to facilitate the extension and retraction movement of the reset elastic element such as the spring. Specifically, the descending frustum-shaped shaft head 452 pushes the linkage ramp block 483, which in turn causes the transverse locking insert 482 to translate along its own axis, allowing the transverse locking insert 482 to insert into the through slot, thereby helping to restrict the relative rotation of the first sleeve 42 and the second sleeve 43. The transverse locking insert 482, in conjunction with the locking ring plate 434, limits the docking position of the first sleeve 42, preventing relative rotation during overall rotary drilling drive, and further improving the docking stability of the first sleeve 42 and the second sleeve 43 when transmitting drilling rotational force.

[0062] like Figure 9 and Figure 10As shown, the seismic straightening component 6 includes an upper support bar 61, a radial damping mechanism 62, a lower support bar 63, an axial damping element 64, and a pressure-adjusting mechanism 65. Preferably, the upper support bar 61 and the radial damping mechanism 62 of the seismic straightening component 6 are arranged circumferentially at intervals on the outer wall surface of the casing 312 of the probe 31. Preferably, the lower support bar 63 of the seismic straightening component 6 is arranged circumferentially at intervals on the inner wall surface of the non-magnetic sleeve 32 in a manner corresponding to the upper support bar 61. More preferably, the radial inner end of the lower support bar 63 abuts against the elastic buffer end face of the radial damping mechanism 62. Preferably, an axial damping element 64 is hinged to the lower support bar 63, and the end of the axial damping element 64 away from the lower support bar 63 is hinged to the bottom surface of the upper support bar 61. Preferably, the upper support bar 61 is further provided with a pressure-adjusting mechanism 65 capable of changing the initial working state of the radial damping mechanism 62 and the axial damping component 64 according to the hydraulic strength of the drilling fluid. Preferably, an elastic sealing strip is provided on the radially outer side of the upper support bar 61 to elastically fill the changing gap between it and the lower support bar 63. Preferably, the two sides of the upper support bar 61 are aligned and connected with shielding side plates 611 by welding or other means. More preferably, the U-shaped side of the generally U-shaped lower support bar 63 is fitted with an L-shaped elastic sealing strip to fill the assembly gap between the lower support bar 63 and the shielding side plate 611. Preferably, the bottom surface of the horizontal groove 621 of the radial damping mechanism 62 is provided with an elastic sealing strip to fill the assembly gap between it and the lower support bar 63. More preferably, an elastic sealing strip to fill the assembly gap between it and the shielding side plate 611 is also fitted on the outer side of the horizontal groove 621. Preferably, the elastic sealing strip is a rubber strip with an internal sealing cavity, allowing it to have a large deformation capacity and effectively fill gaps with varying widths. This application constructs a connecting shell for a centering support structure that can accommodate adaptively adjustable damping intensity and buffer axial and radial vibrations through the cooperation of the upper support strip 61, horizontal groove 621, lower support strip 63, and shielding side plate 611. The pressure-adjusting mechanism 65 provided in this application can change the damping intensity of the radial damping mechanism 62 and the axial damping component 64 according to the impact force of the directional flow of pressurized drilling fluid, enabling them to adaptably and effectively mitigate vibration impacts. This achieves automatic adaptation to impacts of different intensities, reducing damage and impact on the probe 31. Furthermore, the adaptive damping can improve the vibration impact mitigation effect to a certain extent, giving the anti-vibration positioning structure formed by the anti-vibration centering component 6 better support and stability, improving its long-term operational efficiency and fatigue life.

[0063] Preferably, a radial buffer airbag 622 is filled in the horizontal groove 621 of the radial damping mechanism 62. More preferably, the pressing vertical plate 633 of the lower support bar 63 abuts against the side surface of the radial buffer airbag 622 by sliding into the horizontal groove 621. Preferably, at least a portion of the radial buffer airbag 622 is attached to the groove wall of the horizontal groove 621 by applying adhesive, positioning the radial buffer airbag 622 in the horizontal groove 621 and preventing the radial buffer airbag 622 from slipping out. The radial buffer airbag 622 can change volume under the adjustable compression of the pressure adjustment mechanism 65, so that its inflation support strength changes synchronously, thereby giving the radial damping mechanism 62 an automatically adjustable buffer strength.

[0064] Preferably, the pressing vertical plate 633 of the lower support bar 63 is connected to the side connecting vertical plate 631 via the lower horizontal plate 632, thereby forming a U-shaped structure in the axial section. This allows the pressing vertical plate 633 to slide into the horizontal groove 621 and abut against the surface of the radial buffer airbag 622, thus forming a radial vibration damping support structure. Preferably, the side connecting vertical plate 631 is fixed to the inner annular wall of the non-magnetic sleeve 32 by means of countersunk screws or welding. Preferably, the lower axial end of the axial damping member 64 is hinged to the lower horizontal plate 632.

[0065] Preferably, the axial damping component 64 is a hydraulic adjustment mechanism, namely a miniature hydraulic damping rod. The rod body is equipped with a hydraulic valve plug connected to the lifting core rod and an airtight piston located above the lifting core rod, which divides its column cavity into two selectively connected hydraulic oil chambers and a pressurized air chamber of variable size. The centrally located hydraulic oil chamber is connected to the oil storage secondary chamber in the cylinder 651 through the oil supply pipeline 654, so that the buffering and damping strength of the axial damping component 64 can be flexibly adjusted according to the directional delivery pressure of the drilling fluid, thereby realizing the adaptive adjustment of the damping performance of the axial damping structure.

[0066] Preferably, the pressure-adjusting mechanism 65 includes a cylinder 651 mounted on the upper support bar 61, a lifting connecting rod 652 inserted into the cylinder 651, a follow-up adjusting piston 653 mounted on the lifting connecting rod 652, an oil supply pipeline 654 connecting the cylinder 651 and the axial damping member 64, and a pressure-receiving lifting arc plate 655 and a pressure-adjusting plate 656 respectively mounted at the top and bottom ends of the lifting connecting rod 652. Preferably, the lower axial end of the lifting connecting rod 652 extends into the cavity of the horizontal groove 621 by penetrating the upper support bar 61 and the upper groove wall of the horizontal groove 621. More preferably, the pressure-adjusting plate 656 connected to the lower axial end of the lifting connecting rod 652 presses against the top surface of the radial buffer airbag 622, changing the initial size of the radial buffer airbag 622 and its buffering strength. Preferably, multiple pressure-bearing lifting arc plates 655, corresponding one-to-one with the upper support bar 61, form a ring-shaped plate structure by connecting end to end. This allows multiple circumferentially spaced pressure-adjusting mechanisms 65 to undergo equal and synchronous lifting movements under the impact of the directional flow of pressurized drilling fluid, while simultaneously providing equivalent initial working condition adjustment for multiple radial damping mechanisms 62 and axial damping components 64. Specifically, the pressurized delivery parameters of the drilling fluid can be changed according to the actual drilling state of the drill bit 2. The pressure change of the drilling fluid is also positively correlated with the vibration and impact force during the drilling process. By linking the pressure of the drilling fluid with the working strength of the buffer and damping structure, the buffer and damping structure can have different buffering and damping capabilities under different conditions, adaptably buffering and reducing vibration and impact of different intensities, reducing the vibration and impact on the probe 31, and improving the structural stability and lifespan of the probe 31 during drilling.

[0067] Preferably, the lower rotary drive module 8 is a downhole tool powered by drilling fluid, comprising a bypass valve, a screw drill motor, a universal joint, a drilling drive shaft, and a guide casing. The screw drill motor is the core component of the entire screw drill tool and is rotatably mounted within the guide casing. The upper axial end of the guide casing is sealed to the structural bend joint 11, and its lower axial end is rotatably and sealed into the upper port of the third casing 44, allowing the drilling fluid output from the screw drill motor to flow directionally into the third casing 44. Preferably, the drilling drive shaft, coaxially connected to the output end of the screw drill motor, is also connected to the first casing 42, enabling it to drive the deflection adjustment assembly 4 to rotate during drilling, thus rotating the drill string. Specifically, when drilling fluid is pumped into the screw drill motor through the bypass valve, a pressure difference is generated at the outlet of the screw drill motor, which forces the rotor of the screw drill motor to rotate continuously in the stator. At the same time, the generated torque and speed are transmitted to the drilling drive shaft and drill bit 2 through the universal joint, thereby achieving the purpose of drilling.

[0068] Furthermore, this application also provides a borehole trajectory detection method that matches a borehole trajectory detection system with an adjustable window opening direction in the drilling casing, comprising the following steps:

[0069] S1. Lift the drill rod 1 upward, causing the lower rotation drive module 8 and the deflection adjustment component 4 located at the lower end of the drill rod 1 to move upward synchronously, changing the working posture of the deflection adjustment component 4, so that the upward-moving deflection transmission shaft 45 releases the locking limitation on the linkage locking component group 48, unlocks the limiting structure of the deflection transmission shaft 45 and the linkage locking component group 48, and engages with the deflection transmission disk 46 to form a deflection transmission structure, realizing the transformation of the deflection adjustment component 4 from the locking working condition to the transmission working condition;

[0070] S2. The deflection drive unit 41 drives the deflection transmission shaft 45 to deflect in a directional and equal manner, thereby driving the deflection transmission disk 46 to rotate, and in turn driving the second sleeve 43 and the detection module 3 connected to it to deflect synchronously.

[0071] S3. The probe 31 of the detection module 3 is synchronously deflected to the target azimuth angle, and the inclination data of the current position is collected by the measurement unit 311 installed in the probe 31.

[0072] S4. Repeat steps S2-S3 so that the measuring unit 311, which is offset and installed inside the probe 31, performs multi-position inclination data acquisition on the same tool section in sequence, thereby covering the preset circumferential angle range. This allows the processing unit 313 of the probe 31 to obtain the mean inclination data of the centering point through multi-level median calculation, thereby reducing the alignment error.

[0073] S5. Lower the drill rod 1, causing the deflection drive shaft 45 to move down synchronously, pushing the linkage locking assembly 48 to form a locking and limiting structure in a way that restricts the relative rotation of the first casing 42 and the second casing 43, and restoring the drilling posture.

[0074] The deflection adjustment component 4 of this application enables the probe 31 to collect data at different inclinometer points through high-precision deflection adjustment, and the probe 31 corrects and eliminates deviation outliers by calculating the average data, thereby improving the accuracy of inclinometer measurement.

[0075] Preferably, when switching working conditions, the lifting and lowering lengths of the drill rod 1 are preset, which are designed according to the distance required to move based on the working state of the round-headed transmission clip 451 and the frustum head 452 of the deflection drive shaft 45. Specifically, when the round-headed transmission clip 451 is engaged in the flared limiting groove 462, a transmission working condition is established; when the frustum head 452 abuts against the linkage ramp block 483, a locking working condition is established.

[0076] Preferably, the multi-station acquisition of the measurement unit 311 includes the deflection drive unit 41 driving the probe 31 to deflect synchronously in a directional deflection manner at equal angular intervals, and the single deflection angle can be preset, with an adjustable range of 15°-60°.

[0077] Preferably, when the drill rod 1 is lifted, the deflection drive shaft 45 moves upward synchronously, causing the truncated cone shaft head 452 to disengage from the linkage ramp block 483, and the reset elastic element pushes the horizontal locking insert 482 to retract radially inward, releasing the insertion limit of the horizontal locking insert 482 on the correction locking arc plate 421.

[0078] Preferably, during drilling, the anti-vibration straightening component 6 reduces the externally transmitted vibration impact through the radial buffer airbag 622 and the axial damping component 64, thereby reducing the vibration damage intensity of the probe 31. Furthermore, the pressure adjustment mechanism 65 dynamically adjusts the initial air pressure of the radial buffer airbag 622 and the initial hydraulic pressure of the axial damping component 64 according to the changes in the drilling fluid hydraulic pressure, thereby realizing the follow-up adjustment of the vibration damping support strength.

[0079] Preferably, the adjustment process of the pressure-adjusting mechanism 65 includes:

[0080] The drilling fluid impacts the pressurized lifting arc plate 655, pushing the lifting connecting rod 652 to move axially downward.

[0081] The pressure adjustment plate 656 compresses the radial buffer airbag 622, increasing the initial buffer strength of the radial buffer airbag 622;

[0082] Hydraulic oil is simultaneously supplied to the axial damping component 64 through the oil supply pipeline 654 to enhance the axial damping stiffness.

[0083] Preferably, the multi-level median calculation of the processing unit 313 includes:

[0084] Two sets of inclinometer data collected from two workstations with the probe windows facing exactly opposite directions are used as a pair of basic data that can be used for median calculation. Median calculation is performed on multiple pairs of basic data separately.

[0085] By fusing multiple sets of data through secondary mean calculation of the median data, drill string attitude parameters that more closely approximate the trajectory parameters at the tool face section of the borehole can be obtained. By outputting the azimuth, inclination, and tool face angle of the drill string attitude parameters, the ground data receiving system can determine the three-dimensional coordinates of each measuring point in the borehole coordinate system based on these data, thereby obtaining the measured trajectory diagram of the borehole, observing the deviation between the measured trajectory and the design trajectory, and facilitating subsequent borehole trajectory control.

[0086] For example, if eight sets of inclinometer data are collected in a rotating circle, denoted by a1, b1, c1, d1, a2, b2, c2, and d2 respectively, then a1, a2 / b1, b2 / c1, c2 / d1, and d2 represent two sets of inclinometer data collected from two workstations with the detection windows facing exactly opposite directions. After calculating the median, four median data points A, B, C, and D are obtained. Finally, the mean data is obtained by averaging the four median data points.

[0087] This invention is not limited to the above-described optional embodiments. Anyone inspired by this invention can derive various other forms of products. Regardless of any changes in shape or structure, any technical solution falling within the scope of the claims is protected by this invention. Those skilled in the art should understand that this specification and its accompanying drawings are illustrative and not intended to limit the scope of the claims. The scope of protection of this invention is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A borehole trajectory detection system with adjustable drilling direction of a while-drilling pipe windowing device, comprising a drill rod (1) and a drill bit (2), characterized in that, an axial lower end of the drill rod (1) is connected with a lower rotary drive module (8) through a structural elbow joint (11), an axial lower end of the lower rotary drive module (8) is further rotatably connected with a deflection adjustment assembly (4) which changes the detection window orientation of a detection pipe (31) of a detection module (3) in such a way that the detection pipe (31) performs multi-station inclination data acquisition on the same tool section, and the deflection adjustment assembly (4) is further connected with a non-magnetic casing (32) of the detection module (3) which is sleeved on the detection pipe (31) through a non-magnetic short joint (5), wherein, the detection pipe (31) is coaxially inserted into the non-magnetic casing (32) through a shock-resistant righting assembly (6) which can adaptively buffer the shock impact transmitted to it from the outside, and a measurement unit (311) of the detection pipe (31) is offsetly installed in a tube shell (312) in such a way that it deviates from the central axis of the tube shell (312); an axial lower end of the non-magnetic casing (32) is connected with the drill bit (2) through a non-magnetic drill collar (7); an outer side of a deflection drive unit (41) of the deflection adjustment assembly (4) is sleeved with a coaxially arranged first casing (42) and a third casing (44), thereby forming an annular gap in which a second casing (43) is movably inserted between the first casing (42) and the third casing (44); a deflection transmission disc (46) and a lock position installation base plate (47) are axially spaced apart in the second casing (43) which is coaxially connected with an axial upper end of the non-magnetic casing (32), and a deflection transmission shaft (45) which is in transmission connection with an output end of the deflection drive unit (41) movably penetrates the deflection transmission disc (46) and the lock position installation base plate (47), the deflection transmission shaft (45) adjusts the working posture of a linkage clamping part group (48) installed on the lock position installation base plate (47) by means of axial lifting, so that the linkage clamping part group (48) can limit the insertion and sleeving assembly position of the first casing (42) and the second casing (43).

2. The borehole trajectory detection system of claim 1, wherein, the deflection drive unit (41) is installed in the third casing (44) through a multi-hole conductive ring plate (411) sleeved on its main body, and the surface of the multi-hole conductive ring plate (411) is further connected with the first casing (42); a correction clamping arc plate (421) is embedded on the pipe wall of the first casing (42) in a ring direction spaced apart manner.

3. The borehole trajectory detection system of claim 2, wherein the windowing direction of the drilling pipe is adjustable. the second casing (43) comprises a coaxial inner tube (431), a coaxial outer tube (432), and a connecting cross bar (433) arranged in the annular gap between the coaxial inner tube (431) and the coaxial outer tube (432) in such a way that the coaxial insertion and sleeving state of the coaxial inner tube (431) and the coaxial outer tube (432) can be positioned, a clamping ring plate (434) which can limit a clamping groove matched with the correction clamping arc plate (421) is arranged on the inner tube wall of the coaxial inner tube (431).

4. The borehole trajectory detection system of claim 3, wherein the windowing direction of the drilling pipe is adjustable. A plurality of round head transmission clamping strips (451) are arranged on the deflection transmission shaft (45) in a ring-shaped and spaced manner; A sleeve (461) is centrally inserted on the deflection transmission disc (46) and sleeved on the deflection transmission shaft (45), and a flared limiting clamping groove (462) capable of accommodating the round head transmission clamping strip (451) is formed on the inner wall surface of the sleeve (461) in a rotationally symmetrical manner.

5. The borehole trajectory detection system of claim 4, wherein the windowing direction of the drilling pipe is adjustable. The linkage clamping member group (48) comprises a U-shaped guide block (481) installed on the lock position installation base plate (47) in a ring-shaped and spaced manner, a transversely clamped clamping strip (482) slidingly passing through a through groove cavity formed by the U-shaped guide block (481) and the lock position installation base plate (47), and a linkage inclined slope block (483) arranged at the proximal end of the transversely clamped clamping strip (482). The bottom end of the deflection transmission shaft (45) is further provided with a circular table shaft head (452) capable of pushing the linkage inclined slope block (483) to move horizontally during its descent.

6. The borehole trajectory detection system of claim 5, wherein the windowing direction of the drilling pipe is adjustable. The upper support strips (61) and the radial damping mechanisms (62) of the anti-seismic centralizing assembly (6) are arranged on the outer wall surface of the pipe shell (312) in a ring-shaped and spaced manner, the lower support strips (63) of the anti-seismic centralizing assembly (6) are arranged on the inner annular wall surface of the non-magnetic casing (32) in a ring-shaped and spaced manner, the axial damping members (64) are hinged to the lower support strips (63), and one end of the axial damping members (64) away from the lower support strips (63) is hinged to the bottom surface of the upper support strips (61), A pressure-adjusting mechanism (65) capable of changing the initial working state of the radial damping mechanisms (62) and the axial damping members (64) is further arranged on the upper support strips (61).

7. The borehole trajectory detection system of claim 6, wherein the windowing direction of the drilling pipe is adjustable. The lying grooves (621) of the radial damping mechanisms (62) are filled with radial buffer air bags (622), and the pressing vertical plates (633) of the lower support strips (63) are abutted on the side surface of the radial buffer air bags (622) in a sliding insertion manner in the lying grooves (621).

8. The borehole trajectory detection system of claim 7, wherein the windowing direction of the drilling pipe is adjustable. The pressure-adjusting mechanism (65) comprises a cylinder (651) arranged on the upper support strips (61), a lifting connecting rod (652) inserted in the cylinder (651), a follow-up adjusting piston (653) sleeved on the lifting connecting rod (652), an oil delivery pipeline (654) connecting the cylinder (651) and the axial damping members (64), and a pressure-receiving lifting arc plate (655) and a pressure-adjusting plate (656) arranged at the top end and the bottom end of the lifting connecting rod (652), respectively.

9. A method for drilling trajectory detection with adjustable direction of drilling pipe windowing, comprising the drilling trajectory detection system of claim 8, characterized in that, The method further comprises the following steps: S1. The drill rod (1) is lifted to drive the lower rotary drive module (8) at the lower end of the drill rod (1) and the deflection adjusting assembly (4) to move upward synchronously, thereby changing the working posture of the deflection adjusting assembly (4), so that the deflection transmission shaft (45) moving upward is released from the locking limitation of the linkage clamping member group (48), and is clamped and connected with the deflection transmission disc (46) to form a deflection transmission structure. S2. The deflection driving unit (41) drives the deflection transmission shaft (45) to generate a directional equivalent deflection, drives the deflection transmission disc (46) to rotate, and further drives the second sleeve (43) and the detection module (3) connected therewith to deflect synchronously; S3. The probe tube (31) of the detection module (3) deflects to a target azimuth angle synchronously, and the measurement unit (311) offset-mounted in the probe tube (31) collects the current working position's surveying data; S4. Repeat steps S2-S3, so that the measurement unit (311) offset-mounted in the probe tube (31) sequentially collects multi-position surveying data on the same tool section, thereby covering a preset circumferential angle range, so that the processing unit (313) of the probe tube (31) obtains the average surveying data of the center point position through multi-level median calculation; S5. Lower the drill rod (1), drive the deflection transmission shaft (45) to move down synchronously, thereby push the linkage clamping component group (48) to form a locking limiting structure in a manner of limiting the relative rotation of the first sleeve (42) and the second sleeve (43), and restore the drilling posture.

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