Deep borehole deviation testing device

Abstract

This invention relates to the field of engineering geological exploration technology and discloses a deep borehole inclination testing device, including a casing, a probe, a borehole inclination measurement module, a laser emission module, a depth measurement module, and an information retrieval and acquisition module. The probe is fixedly installed inside the casing. The borehole inclination measurement module includes a vertical line movably connected to a movable ring inside the probe, a measuring weight fixed at the bottom of the vertical line, and a photosensitive scale plate fixed inside the probe, with a reference line at the center of the photosensitive scale plate. The laser emission module includes a laser emitter fixed to the top of the vertical line. The depth measurement module includes an accelerometer installed in the upper part of the probe. The information retrieval and acquisition module includes a photoelectric signal converter electrically connected to the photosensitive scale plate, a borehole inclination information acquisition module connected to the photoelectric signal converter, and a wireless signal transmitter connected to the accelerometer and the borehole inclination information acquisition module, respectively. This invention effectively avoids construction problems caused by borehole inclination and improves testing efficiency and accuracy.

Description

Technical Field

[0001] This invention relates to the field of engineering geological exploration technology, specifically to a device for testing the inclination of deep boreholes. Background Technology

[0002] In engineering geological exploration, deep drilling technology is widely used for geological information acquisition in large-scale projects such as pumped storage power stations, with drilling depths often reaching 300-650 meters. Controlling the verticality of such deep boreholes is crucial to ensuring project quality. In actual construction, a 2-3° deviation in the borehole can not only cause difficulties in casing retrieval after bending, but also potentially lead to safety accidents such as wire breakage, severely impacting subsequent construction progress and increasing additional costs. Therefore, how to monitor the borehole's tilt status in real time and accurately during drilling to ensure the borehole advances along the predetermined trajectory has become a pressing technical challenge in the field of deep drilling.

[0003] Currently, most borehole inclination testing equipment used in the industry is based on wired transmission principles, connecting the probe, synchronizer, and computer terminal via cables to achieve data transmission and trajectory mapping. However, this technical solution has significant drawbacks in deep drilling scenarios: on the one hand, the use of long-distance cables not only increases equipment costs, but also involves complex sealing processes at the interfaces, making signal interruptions prone to occur in the high humidity and high pressure environments at depth, affecting monitoring continuity; on the other hand, existing equipment has a relatively large overall structure, making it inconvenient to transport and install, difficult to adapt to confined drilling work spaces, and its measurement accuracy is easily affected by factors such as cable vibration and tension, making it difficult to meet the high-precision monitoring requirements for inclination angles in deep drilling.

[0004] Therefore, developing a borehole inclination testing device that can adapt to the deep drilling environment, adopt a more efficient data transmission method, and has the characteristics of simple structure and accurate measurement is of great significance for improving the safety and efficiency of deep drilling operations. Summary of the Invention

[0005] In view of this, the present invention provides a deep borehole inclination testing device to solve the problems of inconvenience caused by long-distance cables and large overall structure of traditional borehole inclination testing equipment.

[0006] In a first aspect, the present invention provides a deep borehole inclination testing device, comprising: The casing has a drill pipe connecting ring at the top and a drill bit movably connected to the drill bit at the bottom via a drill bit connecting ring. The probe is fixedly installed inside the sleeve; The inclination measurement module includes a vertical line movably connected to a movable ring inside the probe tube, an inclination measuring weight fixed at the bottom end of the vertical line, and a photosensitive scale plate fixed inside the probe tube, with a reference line at the center of the photosensitive scale plate. A laser emitting module includes a laser emitter fixed to the top of the vertical line, the emission direction of which extends along the vertical line to the photosensitive scale plate; The depth measurement module includes an acceleration sensor installed in the upper part of the probe; The information collection module includes a photoelectric signal converter electrically connected to the photosensitive scale plate, a tilt measurement information collection module connected to the photoelectric signal converter, and a wireless signal transmitter connected to the accelerometer and the tilt measurement information collection module, respectively.

[0007] When the deep borehole inclination testing device is working, it is first connected to the drill rod of the drilling machine through the drill rod connecting ring at the top of the casing. During drilling, the bottom drill bit drives the casing deeper into the formation, and the probe moves synchronously with the casing. In the borehole inclination measurement module, the inclination measuring weight remains vertical due to gravity, which in turn drives the laser emitter at the top to maintain the vertical direction through the plumb line. The laser emitted by the laser emitter extends along the plumb line to the photosensitive scale. When the borehole is tilted, the casing and probe tilt accordingly, but the laser still shines vertically on the corresponding scale on both sides of the baseline of the photosensitive scale. This reflects the borehole inclination angle; the accelerometer of the depth measurement module monitors the acceleration changes of the probe movement in real time to obtain borehole depth information; in the information collection module, the light signal received by the photosensitive scale is converted into an electrical signal by a photoelectric signal converter and then transmitted to the inclination information collection module. The inclination information collection module synchronously sends the borehole inclination data and the depth information collected by the accelerometer through a wireless signal transmitter, realizing real-time and accurate monitoring of the inclination angle and depth of deep boreholes, effectively avoiding construction problems caused by borehole inclination, and improving testing efficiency and accuracy.

[0008] In one alternative implementation, when the borehole is tilted, the laser emitter's spot on the photosensitive scale deviates from the baseline, and the amount of deviation directly characterizes the borehole tilt angle.

[0009] When the borehole tilts, the casing and probe tilt synchronously with the borehole, while the measuring weight remains vertical due to gravity. This vertical force drives the laser emitter to maintain its vertical orientation. The laser emitted by the emitter illuminates the photosensitive scale vertically, causing the resulting spot to deviate from the baseline at the center of the scale. Since the graduations on the photosensitive scale correspond to the borehole tilt angle, the offset of the spot relative to the baseline directly reflects the degree of borehole tilt. A larger offset indicates a larger tilt angle, thus providing a direct and accurate representation of the borehole tilt angle and offering clear quantitative data for real-time monitoring of borehole tilt.

[0010] In one alternative implementation: The movable ring allows the vertical line to swing freely during drilling; The weight of the inclinometer ensures that the vertical line remains perpendicular to the horizontal plane.

[0011] The movable ring provides flexible space for the plumb line. During drilling, regardless of the angle at which the probe and casing tilt, the movable ring allows the plumb line to swing freely, ensuring that the plumb line is not constrained by the tilt of the probe. At the same time, the weight of the inclination measuring weight itself generates a continuous downward vertical pull. This pull keeps the plumb line perpendicular to the horizontal plane, thus ensuring that the laser emitter can stably emit laser light in the vertical direction. This lays a reliable reference foundation for the subsequent accurate measurement of the hole inclination angle by the spot offset, ensuring that even when the borehole is tilted, the tilt information can be accurately captured through the cooperation of the laser and the photosensitive scale.

[0012] In one alternative implementation: The accelerometer detects the acceleration components of the probe in the vertical and horizontal directions in real time, and the acceleration data is integrated to generate borehole depth and trajectory information.

[0013] The accelerometer operates continuously during drilling, capturing the vertical and horizontal acceleration components of the probe in real time. After transmission, this acceleration data is integrated to convert the vertical acceleration information into borehole depth data, accurately reflecting the drilling depth. Simultaneously, by combining the horizontal acceleration components, the actual borehole trajectory information is generated, clearly showing the borehole's direction in deep strata. This combination of accelerometer sensing and integration provides accurate data support for real-time monitoring of borehole depth and trajectory, and, in conjunction with the borehole inclination measurement module, enables comprehensive monitoring of the deep borehole's condition.

[0014] In one optional implementation, the information collection module further includes a ground-based mobile terminal and a computer terminal. The wireless signal transmitter synchronously transmits the aperture tilt angle signal and acceleration signal to the mobile terminal and the computer terminal for real-time display.

[0015] The accelerometer operates continuously during drilling, capturing the vertical and horizontal acceleration components of the probe in real time. After transmission, this acceleration data is integrated to convert the vertical acceleration information into borehole depth data, accurately reflecting the drilling depth. Simultaneously, by combining the horizontal acceleration components, the actual borehole trajectory information is generated, clearly showing the borehole's direction in deep strata. This combination of accelerometer sensing and integration provides accurate data support for real-time monitoring of borehole depth and trajectory, and, in conjunction with the borehole inclination measurement module, enables comprehensive monitoring of the deep borehole's condition.

[0016] In one alternative implementation: The photoelectric signal converter converts the light signal of the photosensitive scale into a voltage signal; The inclination information acquisition module includes an AD conversion unit that converts voltage signals into digital inclination angle values.

[0017] In one optional embodiment, the probe is equipped with a power supply module to provide DC power to the laser transmitter, the accelerometer, and the wireless signal transmitter.

[0018] In one alternative implementation: The wireless signal transmitter is connected to the photoelectric signal converter, the inclinometer information acquisition module, and the acceleration sensor via a cable.

[0019] In one optional embodiment, the drill bit connecting ring and the drill rod connecting ring are quick-release snap-fit ​​structures.

[0020] Secondly, the present invention also provides a method for measuring borehole inclination based on the deep borehole inclination testing device, comprising the following steps: During drilling, the inclined weight keeps the vertical line vertical, and the laser emitter projects a laser beam onto the photosensitive scale. The real-time hole tilt angle is determined by the offset of the laser spot relative to the baseline. Simultaneously, triaxial acceleration data is collected through the aforementioned accelerometer, and the drilling depth is generated through integration calculation; The wireless signal transmitter sends the borehole inclination angle and depth data to the ground terminal to generate a drilling trajectory map.

[0021] This borehole inclination measurement method achieves real-time monitoring of deep borehole status through multi-module collaboration: During drilling, the gravity of the inclination measuring weight keeps the plumb line vertical, ensuring that the laser beam projected by the laser transmitter illuminates the photosensitive scale plate vertically; when the borehole tilts, the casing and probe tilt accordingly, while the laser beam remains vertical, causing the light spot on the photosensitive scale plate to shift relative to the baseline. By using a pre-calibrated relationship between the offset and angle, the real-time borehole inclination angle can be accurately calculated. Simultaneously, an accelerometer synchronously collects acceleration data of the probe in three axes. The borehole depth information is obtained by integrating the vertical acceleration, and the trajectory calculation is further optimized by combining it with horizontal acceleration data. After the wireless transmitter sends the real-time borehole inclination angle and depth data to the ground terminal, the terminal system integrates and analyzes the data, determines the borehole's tilt direction and degree based on the inclination angle, and generates a three-dimensional drilling trajectory map based on the depth information, visually presenting the borehole's underground direction. This measurement method, through the combination of optical and inertial sensing technologies, enables efficient and accurate monitoring of deep borehole trajectories, providing reliable geological guidance data for engineering construction. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is an overall schematic diagram (in recovery state) of a deep borehole inclination testing device according to an embodiment of the present invention. Figure 2 This is a schematic diagram of a deep borehole inclination testing device according to an embodiment of the present invention (in working condition). Figure 3 This is a schematic diagram of a photosensitive scale plate in a deep borehole inclination testing device according to an embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures: 1-Casing; 2-Drill bit; 3-Perpendicular lines; 4- Inclinometer weight; 5-Photosensitive scale; 6-Baseline; 7- Photoelectric signal converter; 8- Inclination information acquisition module; 9-Power supply module; 10 - Drill bit connecting ring; 11-Laser emitter; 12-Wireless signal transmitter; 13 - Accelerometer; 14-Fixing clip; 15-Active ring; 16-Probe; 17-Drill pipe connecting ring; 18-Deep soil and rock layers; 19-Mobile terminals; 20-Computer Terminal; 21-Cable. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In engineering geological exploration, deep drilling technology is widely used for geological information acquisition in large-scale projects such as pumped storage power stations, with drilling depths often reaching 300-650 meters. Controlling the verticality of such deep boreholes is crucial to ensuring project quality. In actual construction, a 2-3° deviation in the borehole can not only cause difficulties in casing retrieval after bending, but also potentially lead to safety accidents such as wire breakage, severely impacting subsequent construction progress and increasing additional costs. Therefore, how to monitor the borehole's tilt status in real time and accurately during drilling to ensure the borehole advances along the predetermined trajectory has become a pressing technical challenge in the field of deep drilling.

[0027] Currently, most borehole inclination testing equipment used in the industry is based on wired transmission principles, connecting the probe, synchronizer, and computer terminal via cables to achieve data transmission and trajectory mapping. However, this technical solution has significant drawbacks in deep drilling scenarios: on the one hand, the use of long-distance cables not only increases equipment costs, but also involves complex sealing processes at the interfaces, making signal interruptions prone to occur in the high humidity and high pressure environments at depth, affecting monitoring continuity; on the other hand, existing equipment has a relatively large overall structure, making it inconvenient to transport and install, difficult to adapt to confined drilling work spaces, and its measurement accuracy is easily affected by factors such as cable vibration and tension, making it difficult to meet the high-precision monitoring requirements for inclination angles in deep drilling.

[0028] Therefore, developing a borehole inclination testing device that can adapt to the deep drilling environment, adopt a more efficient data transmission method, and has the characteristics of simple structure and accurate measurement is of great significance for improving the safety and efficiency of deep drilling operations.

[0029] The following is combined with Figures 1 to 3 The following describes embodiments of the present invention.

[0030] According to an embodiment of the present invention, a deep borehole inclination testing device is provided, comprising a casing 1, a probe 16, a borehole inclination measurement module, a laser emission module, a depth measurement module, and an information retrieval and acquisition module. The casing 1 has a drill rod connecting ring 17 at its top and a drill bit 2 movably connected to its bottom via a drill bit connecting ring 10. The probe 16 is fixedly disposed inside the casing 1. The borehole inclination measurement module includes a vertical line 3 movably connected to a movable ring 15 inside the probe 16, a measuring weight 4 fixed at the bottom end of the vertical line 3, and a photosensitive lithography device fixed inside the probe 16. The photosensitive scale plate 5 has a reference line 6 at its center; the laser emission module includes a laser emitter 11 fixed at the top of the vertical line 3, whose emission direction extends along the vertical line 3 to the photosensitive scale plate 5; the depth measurement module includes an acceleration sensor 13 installed in the upper part of the probe tube 16; the information recovery and acquisition module includes a photoelectric signal converter 7 electrically connected to the photosensitive scale plate 5, a tilt measurement information acquisition module 8 connected to the photoelectric signal converter 7, and a wireless signal transmitter 12 connected to the acceleration sensor 13 and the tilt measurement information acquisition module 8 respectively.

[0031] In this embodiment, when the deep borehole inclination testing device is working, it is first connected to the drill rod of the drilling machine through the drill rod connecting ring 17 at the top of the casing 1. During the drilling process inside the deep soil and rock layer 18, the bottom drill bit 2 drives the casing 1 to penetrate deeper into the stratum, and the probe 16 moves synchronously with the casing 1. In the borehole inclination measurement module, the inclination measuring weight 4 always remains vertical due to gravity, and then drives the laser emitter 11 at the top to maintain the vertical direction through the plumb line 3. The laser emitted by the laser emitter 11 extends along the plumb line 3 to the photosensitive scale plate 5. When the borehole is tilted, the casing 1 and the probe 16 tilt accordingly, while the laser still shines vertically on the photosensitive scale plate 5. The baseline 6 has corresponding scale markings on both sides to reflect the borehole inclination angle. The accelerometer 13 of the depth measurement module monitors the acceleration changes of the probe 16 in real time to obtain borehole depth information. In the information acquisition module, the light signal received by the photosensitive scale plate 5 is converted into an electrical signal by the photoelectric signal converter 7 and then transmitted to the inclination information acquisition module 8. The inclination information acquisition module 8 synchronously transmits the borehole inclination data and the depth information acquired by the accelerometer 13 through the wireless signal transmitter 12, realizing real-time and accurate monitoring of the inclination angle and depth of deep boreholes, effectively avoiding construction problems caused by borehole inclination, and improving testing efficiency and accuracy. The accelerometer 13 is stabilized in the upper middle part of the probe by the fixing clamp 14.

[0032] In one embodiment, when the borehole is tilted, the laser emitter 11 deviates from the baseline 6 on the photosensitive scale plate 5, and the amount of deviation directly represents the borehole tilt angle.

[0033] When the borehole tilts, the casing 1 and probe 16 tilt synchronously with the borehole, while the measuring weight 4 remains vertical due to gravity. The plumb line 3 drives the laser emitter 11 to maintain a vertical orientation. At this time, the laser emitted by the laser emitter 11 illuminates the photosensitive scale 5 vertically, and the resulting light spot deviates from the baseline 6 at the center of the photosensitive scale 5. Since the scale on the photosensitive scale 5 corresponds to the borehole tilt angle, the offset of the light spot relative to the baseline 6 directly reflects the degree of borehole tilt. The greater the offset, the greater the borehole tilt angle, thus achieving a direct and accurate representation of the borehole tilt angle and providing a clear quantitative basis for real-time monitoring of the borehole tilt status.

[0034] In one embodiment, the movable ring 15 allows the plumb line 3 to swing freely during drilling; the gravity of the inclinometer weight 4 keeps the plumb line 3 perpendicular to the horizontal plane.

[0035] The movable ring 15 provides flexible movement space for the vertical line 3. During drilling, regardless of the angle at which the probe 16 tilts with the casing 1, the movable ring 15 allows the vertical line 3 to swing freely, ensuring that the vertical line 3 is not constrained by the tilt of the probe 16. At the same time, the weight of the inclination measuring weight 4 itself will generate a continuous vertical downward pull. This pull keeps the vertical line 3 perpendicular to the horizontal plane, thereby ensuring that the laser emitter 11 can stably emit laser in the vertical direction. This lays a reliable reference foundation for the subsequent accurate measurement of the hole inclination angle by the spot offset, ensuring that even when the borehole is tilted, the tilt information can be accurately captured by the cooperation of the laser and the photosensitive scale plate 5.

[0036] In one embodiment, the accelerometer 13 detects the acceleration components of the probe 16 in the vertical and horizontal directions in real time, and the acceleration data is integrated to generate drilling depth and trajectory information.

[0037] Accelerometer 13 operates continuously during drilling, capturing the acceleration components of probe 16 in both the vertical and horizontal directions in real time. After transmission, this acceleration data is integrated to convert the vertical acceleration information into borehole depth data, accurately reflecting the drilling depth. Simultaneously, by combining the horizontal acceleration components, the actual borehole trajectory information is generated, clearly showing the borehole's orientation in deep strata. This combination of acceleration sensing and integration provides accurate data support for real-time monitoring of borehole depth and trajectory, and, in conjunction with the borehole inclination measurement module, enables comprehensive monitoring of the deep borehole's condition.

[0038] In one embodiment, the information collection module further includes a ground-based mobile terminal 19 and a computer terminal 20; wherein the wireless signal transmitter 12 synchronously transmits the aperture angle signal and acceleration signal to the mobile terminal 19 and the computer terminal 20 for real-time display.

[0039] In the information collection and acquisition module, the ground-based mobile terminal 19 and computer terminal 20 serve as data receiving and display terminals, working in conjunction with the wireless signal transmitter 12 to achieve real-time information interaction. The wireless signal transmitter 12 synchronously integrates the borehole inclination angle signal generated by the borehole inclination measurement module and the acceleration signal collected by the accelerometer 13 in the depth measurement module, and then transmits it wirelessly to the mobile terminal 19 and computer terminal 20. Upon receiving the signals, both terminals process the data immediately and display it intuitively. This design allows ground personnel to view the real-time status of the borehole at any time via the mobile terminal 19, and to perform more detailed data recording and analysis via the computer terminal 20. It enables remote real-time monitoring of the borehole inclination angle and drilling trajectory in deep boreholes, improving the convenience and timeliness of data acquisition, and facilitating timely adjustments to drilling strategies based on monitoring results.

[0040] In one embodiment, the photoelectric signal converter 7 converts the light signal of the photosensitive scale 5 into a voltage signal; the inclination information acquisition module 8 includes an AD conversion unit that converts the voltage signal into a digital deflection angle value.

[0041] In this embodiment, when the laser emitted by the laser emitter 11 illuminates the photosensitive scale plate 5 and forms a light spot, the photosensitive scale plate 5 receives the light signal and transmits it to the photoelectric signal converter 7. The photoelectric signal converter 7 converts the light signal into a corresponding voltage signal. The strength or change of the voltage signal reflects the position information of the light spot on the photosensitive scale plate 5. The AD conversion unit in the inclination information acquisition module 8 processes the voltage signal and converts the analog voltage signal into a digital inclination angle value. This achieves accurate conversion from light signal to digital angle information, providing standardized digital data for subsequent transmission by the wireless signal transmitter 12 and display by the ground terminal, ensuring the accuracy of the hole inclination angle measurement and the stability of data transmission.

[0042] In one embodiment, the probe 16 is equipped with a power supply module 9 to provide DC power to the laser transmitter 11, the accelerometer 13, and the wireless signal transmitter 12.

[0043] The power supply module 9 inside the probe 16 serves as the system's energy core, continuously providing a stable DC power supply to the laser transmitter 11, accelerometer 13, and wireless signal transmitter 12. The laser transmitter 11 relies on this power to stably emit laser light, ensuring a clear display of the light spot on the photosensitive scale 5. The accelerometer 13, supported by this power supply, detects the acceleration components of the probe 16 in real time, providing raw data for borehole depth and trajectory calculations. The wireless signal transmitter 12, powered by the power supply module 9, efficiently transmits borehole inclination angle and acceleration signals to the ground terminal. The power supply module 9 ensures the continuous and coordinated operation of all electronic components in the deep borehole environment, providing a reliable energy guarantee for the stable operation of the entire testing device and ensuring that real-time monitoring of borehole inclination and depth is unaffected by power outages.

[0044] In one embodiment, the wireless signal transmitter 12 is connected to the photoelectric signal converter 7, the inclinometer information acquisition module 8, and the acceleration sensor 13 via a cable 21.

[0045] The wireless signal transmitter 12 is connected to the photoelectric signal converter 7, the inclination information acquisition module 8, and the accelerometer 13 via cables 21, forming a stable signal transmission path. Specifically, the voltage signal converted by the photoelectric signal converter 7 is transmitted to the inclination information acquisition module 8 via cable 21. The digital inclination angle value processed by the inclination information acquisition module 8 is transmitted to the wireless signal transmitter 12 via the same cable 21. Simultaneously, the acceleration signal acquired by the accelerometer 13 is also transmitted to the wireless signal transmitter 12 in real time via cable 21. This wired connection method ensures the stability and timeliness of signal transmission between modules, avoids signal loss or interference during transmission, and provides a reliable front-end guarantee for the wireless signal transmitter 12 to collect and transmit data, enabling the ground terminal to accurately receive and display the borehole inclination angle and related depth information.

[0046] In one embodiment, the drill bit connecting ring 10 and the drill rod connecting ring 17 are quick-release snap-fit ​​structures.

[0047] The drill bit connecting ring 10 and the drill rod connecting ring 17 adopt a quick-release snap-fit ​​structure, enabling rapid assembly and disassembly between the drill bit 2 and the casing 1, and between the casing 1 and the drill rod of the drilling rig. This structure eliminates the need for complex tools; connection and disassembly operations are completed simply by engaging and disassembling the snap-fit, significantly reducing the time required for assembly and disassembly. In deep drilling operations, when it is necessary to replace the drill bit 2 or adjust the length of the casing 1, the quick-release snap-fit ​​structure can significantly improve operational efficiency, reduce downtime for equipment preparation and maintenance, and ensure the stability of the connection points, avoiding safety hazards caused by loose connections during drilling. This makes the device more adaptable to the convenience and reliability requirements of field engineering surveys.

[0048] According to an embodiment of the present invention, in another aspect, a method for measuring borehole inclination based on a deep borehole inclination testing device is also provided, comprising the following steps: During drilling, the inclined weight 4 keeps the vertical line 3 vertical, and the laser emitter 11 projects a laser beam onto the photosensitive scale plate 5. The real-time hole tilt angle is determined by the offset of the laser spot relative to the baseline 6. Simultaneously, triaxial acceleration data is collected through accelerometer 13, and the drilling depth is generated through integration calculation; The wireless signal transmitter 12 sends the borehole inclination angle and depth data to the ground terminal to generate a drilling trajectory map.

[0049] This borehole inclination measurement method achieves real-time monitoring of deep borehole status through multi-module collaboration: During drilling, the gravity of the inclination measuring weight 4 keeps the vertical line 3 vertical, ensuring that the laser beam projected by the laser transmitter 11 illuminates the photosensitive scale plate 5 vertically; when the borehole tilts, the casing 1 and probe 16 tilt accordingly, while the laser beam remains vertical, causing the light spot on the photosensitive scale plate 5 to shift relative to the baseline 6. Based on the pre-calibrated relationship between the offset and the angle, the real-time borehole inclination angle can be accurately calculated. Simultaneously, the accelerometer 13 synchronously collects acceleration data of the probe 16 in three axes. The borehole depth information is obtained by integrating the vertical acceleration, and the trajectory calculation is further optimized by combining the horizontal acceleration data. After the wireless signal transmitter 12 transmits the real-time borehole inclination angle and depth data to the ground terminal, the terminal system integrates and analyzes the data, determines the borehole inclination direction and degree based on the borehole inclination angle, and generates a three-dimensional drilling trajectory map based on the depth information, visually presenting the borehole's underground direction. This measurement method, through the combination of optical and inertial sensing technologies, enables efficient and accurate monitoring of deep borehole trajectories, providing reliable geological guidance data for engineering construction.

[0050] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A device for testing the inclination of deep boreholes, characterized in that, include: The casing (1) has a drill rod connecting ring (17) at its top and a drill bit (2) movably connected to its bottom through a drill bit connecting ring (10). The probe (16) is fixedly installed inside the sleeve (1); The borehole inclination measurement module includes a vertical line (3) movably connected to a movable ring (15) inside the probe (16), a measuring weight (4) fixed at the bottom end of the vertical line (3), and a photosensitive scale plate (5) fixed inside the probe (16). The photosensitive scale plate (5) has a reference line (6) at its center. The movable ring (15) allows the vertical line (3) to swing freely during drilling. The gravity of the measuring weight (4) ensures that the vertical line (3) is always perpendicular to the horizontal plane. The laser emitting module includes a laser emitter (11) fixed to the top of the vertical line (3), whose emission direction extends along the vertical line (3) to the photosensitive scale plate (5); when the drilling is tilted, the light spot formed by the laser emitter (11) on the photosensitive scale plate (5) is offset from the baseline (6), and the offset directly represents the hole tilt angle. The depth measurement module includes an acceleration sensor (13) installed in the upper part of the probe (16); the acceleration sensor (13) detects the acceleration components of the probe (16) in the vertical and horizontal directions in real time, and the acceleration data is integrated to generate borehole depth and trajectory information; The information acquisition module includes a photoelectric signal converter (7) electrically connected to the photosensitive scale plate (5), a tilt information acquisition module (8) connected to the photoelectric signal converter (7), and a wireless signal transmitter (12) connected to the accelerometer (13) and the tilt information acquisition module (8) respectively; the photoelectric signal converter (7) converts the light signal of the photosensitive scale plate (5) into a voltage signal; the tilt information acquisition module (8) includes an AD conversion unit that converts the voltage signal into a digital tilt angle value; The information collection module also includes a ground-based mobile terminal (19) and a computer terminal (20); the wireless signal transmitter (12) synchronously transmits the aperture angle signal and acceleration signal to the mobile terminal (19) and the computer terminal (20) for real-time display.

2. The deep borehole inclination testing device according to claim 1, characterized in that, The probe (16) is equipped with a power supply module (9) to provide DC power to the laser transmitter (11), the accelerometer (13), and the wireless signal transmitter (12).

3. The deep borehole inclination testing device according to claim 1, characterized in that: The wireless signal transmitter (12) is connected to the photoelectric signal converter (7), the inclinometer information acquisition module (8) and the acceleration sensor (13) via a cable (21).

4. The deep borehole inclination testing device according to any one of claims 1-3, characterized in that, The drill bit connecting ring (10) and the drill rod connecting ring (17) are quick-release snap-fit ​​structures.

5. A method for measuring borehole inclination based on the deep borehole inclination testing device according to any one of claims 1-4, characterized in that, Includes the following steps: During drilling, the inclined weight (4) keeps the vertical line (3) vertical, and the laser emitter (11) projects a laser beam onto the photosensitive scale plate (5); The real-time hole tilt angle is determined by the offset of the laser spot relative to the baseline (6); The three-axis acceleration data are collected synchronously through the acceleration sensor (13), and the drilling depth is generated by integration. The wireless signal transmitter (12) sends the borehole inclination angle and depth data to the ground terminal to generate a drilling trajectory map.

Images