A directional coring drill and coring method

Abstract

This invention discloses a directional coring drill bit and coring method, belonging to the field of geological drilling technology and equipment technology. It includes a coring inner tube assembly, a transmission tube assembly, a probe tube assembly, and a build-up casing assembly. The transmission tube assembly drives the drill bit as a whole during drilling. The coring inner tube assembly is used for directional coring, drilling azimuth measurement, setting the build-up rate, and sending the data to the build-up casing assembly. The probe tube assembly is used to detect surrounding rock strata and geological structures during drilling, and feeds the data back to the data receiving, storage, and transmission module for analysis to determine whether to adjust the build-up rate. In the build-up casing assembly, the first and second build-up adjustment components of the build-up adjustment mechanism have opposite extension and retraction directions and are not on the same straight line. The build-up casing is located outside the build-up adjustment mechanism. Based on geological analysis results, the attitude of the build-up casing is adjusted by controlling the actions of different build-up adjustment mechanisms, thereby achieving build-up rate adjustment and coring azimuth adjustment.

Description

Technical Field

[0001] This invention belongs to the field of geological drilling technology and equipment technology, specifically a directional coring drill and coring method, which is particularly suitable for complex strata exploration that requires obtaining specific spatial orientation or geological target areas. Background Technology

[0002] In geological scientific research, engineering geological exploration, and mineral resource exploration, obtaining pristine, undisturbed core samples of underground rock strata is crucial. Traditional coring techniques primarily focus on obtaining vertically continuous core columns. However, with the deepening of exploration and the increasing demands for refined geological understanding, obtaining lithological information in only one direction is no longer sufficient. For example, many important geological bodies, such as fault zones, ancient landslide zones, weak interlayers, and fracture zones, are not vertically distributed but exist at inclines or even multiple angles, requiring precise determination of their spatial location and physical and mechanical properties. In mineral resource assessment, it is necessary to understand the extension direction of veins, oil and gas fractures, or specific structural interfaces. All these applications require obtaining oriented cores with clear original spatial orientation information.

[0003] Directional coring drills can achieve directional drilling according to a predetermined trajectory, while continuously acquiring core samples and spatial location information. Currently, there are two main technical solutions for downhole directional coring:

[0004] One approach involves a mechanical screw motor coupled with a wireline coring tool. For example, Chinese invention patent application number 2024100987197 discloses a screw motor coring structure and its coring technology for the directional drilling section. This structure includes a directional drill rod, a guiding system, a screw drill tool, a core tube, and a coring drill bit. The screw drill tool is a bent screw drill tool, which allows directional drilling and coring to be performed simultaneously. That is, the process of directional drilling is also the process of coring, ensuring that the borehole trajectory extends according to the design trajectory and that the core recovery rate is also guaranteed. However, this approach requires changing the drill tool, is inefficient, and cannot achieve continuous coring and continuous directional drilling simultaneously.

[0005] One approach combines a hydraulically pressurized push-type directional drilling device with a wireline coring tool. For example, Chinese invention patent application number 2025107599286 discloses a continuous directional wireline coring drill bit and method for directional drilling. The drill bit includes a directional casing, a hollow motor, and a drill bit. The directional casing includes a spring tube and upper and lower connector tubes at both ends. The directional casing consists of two sections. The first directional casing, the second directional casing, the hollow motor, and the drill bit are connected in series to form a coring cavity. The lower connector tube of the first directional casing and / or the upper connector tube of the second directional casing have an installation groove on their outer side. The directional motor and a push-out device are installed in the installation groove. The push-out device can push against the borehole wall, causing the two sections of the directional casing to bend and achieve directional drilling. However, this approach requires setting the build-up rate before the drill bit is lowered into the well. After lowering the drill bit into the well, a fixed build-up rate is used to achieve continuous directional drilling and coring, and the build-up rate cannot be adjusted.

[0006] In addition, the two methods mentioned above can only extract core samples in a directional manner, and cannot detect and analyze the strata and geological structures around the wellbore, nor can they adjust the drilling trajectory and orientation based on the detection and analysis results.

[0007] Therefore, the research direction required by this invention is to provide a directional coring drill bit and coring method that can simultaneously perform directional coring and trajectory measurement, detect and analyze the surrounding strata and geological structures, and then adjust the build-up rate and drilling coring azimuth in real time based on the geological analysis results to achieve rapid and accurate directional coring. Summary of the Invention

[0008] To address the problems existing in the prior art, this invention provides a directional coring drill bit and coring method, which simultaneously performs directional coring and trajectory measurement, and conducts detection and analysis of the surrounding strata and geological structures. Then, based on the geological analysis results, the build-up rate and drilling coring azimuth are adjusted in real time to achieve rapid and accurate directional coring at different azimuths and build-up rates.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is: a directional coring drill bit, comprising a coring inner tube assembly, a transmission tube assembly, a probe tube assembly, and a directional casing assembly.

[0010] The transmission tube assembly is used to drive the drill bit as a whole to drill.

[0011] The core sampling inner tube assembly is installed inside the transmission tube assembly. It includes a wireline core sampling mechanism, a gyroscope inclination measurement device, a data receiving, storage and transmission module, and a core tube connected in sequence. The core tube is used to obtain rock cores during drilling. The wireline core sampling mechanism is used to remove the core tube from the borehole after core sampling. The gyroscope inclination measurement device is used to measure the overall azimuth data of the drill string after drilling and feed it back to the data receiving, storage and transmission module. The data receiving, storage and transmission module is used to set the build-up rate and send it to the build-up casing assembly so that the entire drill string drills according to the set build-up rate.

[0012] The probe tube assembly is mounted outside the transmission tube assembly and is used to detect the surrounding rock strata and geological structures during drilling. The data is fed back to the data receiving, storage and transmission module for analysis to determine whether to adjust the build-up rate. If adjustment is required, an adjustment command is sent to the build-up casing assembly so that the entire drill string can then drill at the adjusted build-up rate.

[0013] The directional drilling casing assembly includes a directional drilling casing, a data controller installed outside the probe assembly, and multiple sets of directional drilling adjustment mechanisms. Each set of directional drilling adjustment mechanisms includes a first directional drilling adjustment component and a second directional drilling adjustment component, and the extension and retraction directions of the first directional drilling adjustment component and the second directional drilling adjustment component are opposite and not on the same straight line. The directional drilling casing is located outside the directional drilling adjustment mechanism. The data controller is used to receive adjustment commands from the data receiving, storage, and transmission module, and control the synchronous extension and retraction of the first directional drilling adjustment component and the second directional drilling adjustment component in different directional drilling adjustment mechanisms to adjust the attitude of the directional drilling casing, thereby achieving the required directional drilling rate adjustment and core sampling orientation adjustment.

[0014] Furthermore, the transmission tube assembly includes a transmission drill rod and a drill bit. The transmission drill rod has a hollow structure, and the drill bit is mounted at one end of the transmission drill rod with an opening in its center for core sampling during core tube drilling. This structure ensures stable drilling of the entire drilling tool.

[0015] Furthermore, the gyroscope inclination measurement device includes a gyroscope and a battery. The gyroscope is used to measure the overall orientation data of the drill bit and store it in the data receiving, storage and transmission module; the battery powers the gyroscope.

[0016] Furthermore, the detection tube assembly includes a detection component, a data transmission module, and an auxiliary pipe fitted around the transmission drill rod, all three being coaxially connected in sequence. The detection component is used to detect the surrounding rock strata and geological structures; the data transmission module is used to feed the detection data back to the data receiving, storage, and transmission module; and the auxiliary pipe houses the first directional drilling adjustment component, the second directional drilling adjustment component, and the data controller. This structure enables geological exploration of the surrounding coal and rock mass.

[0017] Furthermore, the detection components include a transient electromagnetic measurement module, a resistivity measurement module, a gamma measurement module, an acoustic long-range detection module, and a power supply, with the power supply providing power to each module. These modules are deployed to acquire corresponding geological data through different detection technologies, providing multi-source geological data for subsequent analysis.

[0018] Furthermore, the skewing sleeve assembly also includes a drive power supply on the surface of the auxiliary tube and two hard rubber rings respectively mounted on both ends of the auxiliary tube. The skewing sleeve is fitted onto the two hard rubber rings, enabling the skewing sleeve to tilt and adjust the skewing rate. The drive power supply is used to power the first skewing adjustment component, the second skewing adjustment component, and the data controller.

[0019] Furthermore, the first inclination adjustment component includes a first drive mechanism and a first thrust plate, with the first thrust plate mounted on the telescopic end of the first drive mechanism; the second inclination adjustment component includes a second drive mechanism and a second thrust plate, with the second thrust plate mounted on the telescopic end of the second drive mechanism; when adjusting the inclination rate, the first drive mechanism drives the first thrust plate, and the second drive mechanism drives the second thrust plate, simultaneously applying pressure to the inclination sleeve to control its tilt angle. This structure ensures the accuracy of the inclination rate adjustment.

[0020] Furthermore, the tilt-adjustment mechanism comprises at least four sets, with the tilt-adjustment first and second components of each set evenly distributed along the circumference of the auxiliary tube. By synchronously controlling the tilt-adjustment first and second components of different tilt-adjustment mechanisms, the tilt rate can be adjusted for at least four coring azimuths. This structure satisfies the need for adjustment of different coring azimuths and tilt rates.

[0021] The coring method of the above-mentioned directional coring drill includes the following steps:

[0022] Step 1: Work preparation: On the ground, inspect and adjust the drilling tools, calibrate the parameters, and preset the build-up rate and coring azimuth.

[0023] Step 2, Drilling and Core Sampling: When drilling begins, the data controller receives adjustment instructions from the data receiving, storage and sending module, and controls the first and second components of the corresponding directional adjustment mechanism to adjust the attitude of the directional casing to the preset directional rate and core sampling position, and performs directional core sampling until the core tube is filled with rock sample.

[0024] Step 3, Geological Exploration and Azimuth Determination: Drilling stops when the set position is reached. The gyroscope inclination device measures the azimuth data, while the detection tube assembly performs geological exploration and transmits the azimuth and geological data to the data receiving, storage and sending module for storage.

[0025] Step 4: Obtain rock samples and exploration data: Lift the core tube assembly to the ground, retrieve the rock samples from the core tube, and obtain azimuth data and geological data from the data receiving, storage and distribution module.

[0026] Step 5: Analysis of rock samples and exploration data: Based on the rock samples, azimuth data, and geological data, invert the geological structure model to determine whether to adjust the build-up rate and core sampling azimuth. If no adjustment is needed, repeat steps 2 to 4 until directional core drilling in the area is completed. If it is necessary to maintain the core sampling azimuth and only adjust the build-up rate, proceed to step 7. If it is necessary to maintain the build-up rate and only adjust the core sampling azimuth, proceed to step 6. If it is necessary to adjust both the build-up rate and the core sampling azimuth simultaneously, proceed to steps 6 and 7 in sequence.

[0027] Step 6: Adjusting the coring azimuth: Set the required coring azimuth in the data receiving, storage and sending module. The data controller receives the adjustment data, controls the retraction of the previous directional adjustment mechanism, and controls the action of the directional adjustment mechanism corresponding to the required coring azimuth to adjust the coring azimuth and achieve the preset directional rate in Step 1. After completion, repeat Steps 2 to 5.

[0028] Step 7, Inclination Rate Adjustment: Set the required inclination rate in the data receiving, storage and transmission module. The data controller receives the adjustment data and adjusts the first and second inclination adjustment components in the inclination adjustment mechanism corresponding to the current coring position to adjust to the set inclination rate. Then, repeat steps 2 to 5.

[0029] Furthermore, in step four, rock samples, azimuth data, and geological data are collected more than 10 times. This ensures that the rock samples and data required for subsequent analysis are met, and the accuracy of subsequent analysis is improved through multiple sampling and detection.

[0030] Compared with the prior art, the present invention adopts a combination of the core sampling inner tube assembly, the transmission tube assembly, the detection tube assembly, and the skew-forming sleeve assembly, which has the following advantages:

[0031] 1. This invention achieves directional coring during drilling by cooperating with the inner core tube assembly and the transmission tube assembly. The gyroscope inclination measurement device in the inner core tube assembly is used to measure the overall azimuth data of the drill bit after drilling and feed it back to the data receiving, storage and transmission module. After drilling to the set position, the detection tube assembly conducts geological exploration of the surrounding coal and rock mass and feeds it back to the data receiving, storage and transmission module. Based on the comprehensive geological exploration data and the analysis of the rock samples after coring, it is determined whether the build-up rate and coring azimuth need to be adjusted. If adjustment is required, the build-up rate and coring azimuth are adjusted using the build-up casing assembly. Thus, the build-up rate and coring azimuth can be adjusted in real time according to each coring process, achieving rapid and accurate directional coring at different locations.

[0032] 2. In this invention, the directional casing assembly consists of a first directional adjustment component, a second directional adjustment component, a directional casing, and a data controller. The first and second directional adjustment components extend in opposite directions and are not on the same straight line. This specific arrangement allows the data controller to control the first and second directional adjustment components to extend synchronously in opposite directions during directional rate adjustment, thereby applying a reverse thrust to both ends of the directional casing and adjusting the directional casing's tilt angle to the required directional rate. Furthermore, by setting multiple sets of the first and second directional adjustment components, different coring azimuths and directional rates can be adjusted. Attached Figure Description

[0033] Figure 1 This is a schematic cross-sectional view of the coring drill tool in this invention.

[0034] Figure 2 This is a schematic diagram of the appearance of the coring drill tool removing the directional casing in this invention.

[0035] Figure 3 This is a partial schematic diagram of the skewing sleeve assembly before the skewing rate adjustment in this invention.

[0036] Figure 4 This is a partial schematic diagram of the skewing sleeve assembly after the skewing rate adjustment in this invention.

[0037] Figure 5 This is a flowchart of the core extraction method in this invention.

[0038] In the diagram: 1-Coring inner tube assembly, 11-Wireline coring mechanism, 12-Gyroscope inclination measuring device, 13-Data receiving, storage and transmission module, 14-Core tube, 2-Transmission tube assembly, 21-Transmission drill rod, 22-Drill bit, 3-Detection tube assembly, 31-Detection component, 32-Data transmission module, 33-Auxiliary tube, 4-Inclination casing assembly, 41-Inclination casing, 42-Hard rubber ring, 43-Inclination adjustment first component, 44-Inclination adjustment second component, 45-Drive power supply, 46-Data controller, 431-First thrust reverser, 432-First drive mechanism, 441-Second thrust reverser, 442-Second drive mechanism, α-Inclination angle of the inclination casing. Detailed Implementation

[0039] The present invention will be further described below.

[0040] like Figure 1 As shown, a directional coring drill bit includes a coring inner tube assembly 1, a transmission tube assembly 2, a probe tube assembly 3, and a directional casing assembly 4.

[0041] The transmission tube assembly 2 includes a transmission drill rod 21 and a drill bit 22. The transmission drill rod 21 has a hollow structure, and the drill bit 22 is mounted on one end of the transmission drill rod 21 with an opening in its center for core sampling during the drilling of the core tube 14. This structure ensures stable drilling of the entire drilling tool.

[0042] The core sampling inner tube assembly 1 is installed inside the transmission drill rod 21. It includes a wireline core sampling mechanism 11, a gyroscope inclination measurement device 12, a data receiving, storage and transmission module 13, and a core tube 14 connected in sequence. The core tube 14 is used to obtain rock cores during drilling. The wireline core sampling mechanism 11 is used to remove the core tube 14 from the borehole after core sampling. The gyroscope inclination measurement device 12 includes a gyroscope and a battery. The gyroscope is used to measure the overall azimuth data of the drill string and store it in the data receiving, storage and transmission module 13. The battery powers the gyroscope. The data receiving, storage and transmission module 13 is used to set the build-up rate and send it to the build-up casing assembly 4, so that the entire drill string drills at the set build-up rate.

[0043] The probe assembly 3 is mounted outside the transmission tube assembly 2 with a gap between them, so that when the transmission tube assembly 2 rotates during drilling, the probe assembly 3 does not rotate synchronously with it. It includes a probe component 31, a data transmission module 32, and an auxiliary pipe 33, all fitted around the transmission drill rod 21 and coaxially connected in sequence. The probe component 31 is used to probe the surrounding rock strata and geological structures; the data transmission module 32 is used to feed back the probe data to the data receiving, storage, and distribution module 13; and the auxiliary pipe 33 is used to house the first directional adjustment component 43, the second directional adjustment component 44, and the data controller 46. This structure is used to probe the surrounding rock strata and geological structures during drilling, and after the data is fed back to the data receiving, storage, and distribution module 13 for analysis, it determines whether to adjust the directional rate. If adjustment is needed, an adjustment command is sent to the directional casing assembly 4, causing the entire drill string to subsequently drill at the adjusted directional rate.

[0044] The directional drilling sleeve assembly 4 includes a directional drilling sleeve 41, a data controller 46 installed outside the probe tube assembly 3, and multiple sets of directional drilling adjustment mechanisms. Each set of directional drilling adjustment mechanisms includes a first directional drilling adjustment component 43 and a second directional drilling adjustment component 44, with the extension and retraction directions of the first directional drilling adjustment component 43 and the second directional drilling adjustment component 44 being opposite and not on the same straight line. The directional drilling sleeve 41 is located outside the directional drilling adjustment mechanism. The data controller 46 is used to receive adjustment commands from the data receiving, storage, and transmission module 13, such as... Figure 3 and Figure 4 As shown, the first and second components of the directional adjustment mechanism, directional adjustment, extend and retract synchronously to adjust the attitude of the directional casing 41, i.e., the tilt angle α. It should be noted that the directional rate is different from the tilt angle of the directional casing. The physical essence of the directional rate is the curvature parameter of the borehole axis in three-dimensional space, representing the total bending angle of the borehole trajectory within a unit depth (30 meters or 100 meters). Therefore, the required directional rate adjustment and core sampling orientation adjustment can only be achieved after the entire drill string has drilled along the tilt angle of the directional casing. It also includes two hard rubber rings 42 respectively installed at both ends of the auxiliary tube 33. The directional casing 41 is fitted onto the two hard rubber rings 42, allowing the directional casing 41 to tilt for adjusting the directional rate. The tilt-adjustment mechanism comprises at least four sets. The tilt-adjustment first component 43 and tilt-adjustment second component 44 of each set are evenly distributed circumferentially along the auxiliary tube 33. By synchronously controlling the tilt-adjustment first component 43 and tilt-adjustment second component 44 of different tilt-adjustment mechanisms (i.e., the tilt rate at each coring azimuth is synchronously adjusted by the tilt-adjustment first component 43 and tilt-adjustment second component 44 of one set of tilt-adjustment mechanisms), the tilt rate adjustment at least four coring azimuths can be achieved. This structure satisfies the need for adjustment of different coring azimuths and tilt rates. The drive power supply 45 supplies power to the tilt-adjustment first component 43, the tilt-adjustment second component 44, and the data controller 46.

[0045] As an improvement of the present invention, the detection component 31 includes a transient electromagnetic measurement module, a resistivity measurement module, a gamma measurement module, an acoustic remote sensing module, and a power supply, with the power supply providing power to each module. The above modules are deployed to acquire corresponding geological data through different detection technologies, providing multi-source geological data for subsequent analysis.

[0046] As another improvement of the present invention, such as Figure 2 As shown, the first tilting adjustment component 43 includes a first drive mechanism 432 and a first thrust plate 431, with the first thrust plate 431 mounted on the telescopic end of the first drive mechanism 432; the second tilting adjustment component 44 includes a second drive mechanism 442 and a second thrust plate 441, with the second thrust plate 441 mounted on the telescopic end of the second drive mechanism 442; when adjusting the tilting rate, the first drive mechanism 432 drives the first thrust plate 431, and the second drive mechanism 442 drives the second thrust plate 441, while simultaneously applying pressure to the tilting sleeve 41 to control the tilting angle of the tilting sleeve 41; both the first thrust plate 431 and the second thrust plate 441 are arc-shaped. The above structure ensures the accuracy of the build-up rate adjustment. The specific working process is as follows: When the drill string is guided to build up the angle, the first drive mechanism 432 and the second drive mechanism 442, which are 180° apart in the circumference of each group of build-up adjustment mechanisms (i.e., the extension and retraction directions are opposite and not on the same straight line), work simultaneously. The first drive mechanism 432 pushes out the first thrust plate 431, and at the same time, the second drive mechanism 442 pushes out the second thrust plate 441 in the opposite direction. The two form a reaction force, which makes the build-up casing 41 tilt to form the required build-up rate.

[0047] The coring method of the above-mentioned directional coring drill bit, such as Figure 5 As shown, it includes the following steps:

[0048] Step 1: Work preparation: On the ground, inspect and adjust the drilling tools, calibrate the parameters, and preset the build-up rate and coring azimuth.

[0049] Step 2, Drilling and Core Sampling: When drilling begins, the data controller 46 receives the adjustment instructions from the data receiving, storage and sending module 13, and controls the corresponding directional adjustment mechanism to operate the first directional adjustment component 43 and the second directional adjustment component 44, so that the attitude of the directional casing 41 is adjusted to the preset directional rate and core sampling position, and directional core sampling is performed until the core tube 14 is filled with rock sample.

[0050] Step 3, Geological Exploration and Azimuth Determination: Drilling stops when the set position is reached. The gyroscope inclination device 12 measures the azimuth data, while the detection tube assembly 3 conducts geological exploration and transmits the azimuth data and geological data to the data receiving, storage and sending module 13 for storage.

[0051] Step 4: Obtain rock samples and detection data: The core tube assembly 1 is lifted to the ground via its rope core mechanism 11, the rock sample is retrieved from the core tube 14, and the azimuth data and geological data are obtained from the data receiving, storage and distribution module 13.

[0052] Step 5: Rock Sample and Exploration Data Analysis: Based on the rock samples, azimuth data, and geological data, an inversion geological structural model is performed to determine whether the build-up rate and core sampling azimuth need to be adjusted. The process of inverting the geological structural model uses industry-known techniques, such as full waveform inversion, transient electromagnetic inversion, and DC electrical resistivity inversion, which can be selected as needed. If no adjustment of the build-up rate and core sampling azimuth is required, steps 2 to 4 are repeated to retrieve rock samples, azimuth data, and geological data more than 10 times. This ensures that the rock samples and data required for subsequent analysis are met, and the accuracy of subsequent analysis is improved through multiple sampling and exploration, thereby completing the directional core drilling in this area. If it is necessary to maintain the core sampling azimuth and only adjust the build-up rate, proceed to step 7; if it is necessary to maintain the build-up rate and only adjust the core sampling azimuth, proceed to step 6; if it is necessary to adjust both the build-up rate and core sampling azimuth simultaneously, proceed to steps 6 and 7 in sequence.

[0053] Step 6: Drilling and coring azimuth adjustment: Set the required coring azimuth in the data receiving, storage and sending module 13. The data controller 46 receives the adjustment data, controls the retraction of the previous directional adjustment mechanism, and controls the action of the directional adjustment mechanism corresponding to the required coring azimuth to adjust the coring azimuth and achieve the preset directional rate in step 1. After completion, repeat steps 2 to 5.

[0054] Step 7, Inclination Rate Adjustment: Set the required inclination rate in the data receiving, storage and transmission module 13. The data controller 46 receives the adjustment data and adjusts the inclination adjustment mechanism corresponding to the current coring position, including the first inclination adjustment component 43 and the second inclination adjustment component 44, to adjust to the set inclination rate. Then, repeat steps 2 to 5.

[0055] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A directional coring drill bit, characterized in that, It includes the core sampling inner tube assembly, the transmission tube assembly, the probe tube assembly, and the skew-making sleeve assembly; The transmission tube assembly is used to drive the drill bit as a whole to drill; The core sampling inner tube assembly is installed inside the transmission tube assembly. It includes a wireline core sampling mechanism, a gyroscope inclination measurement device, a data receiving, storage and transmission module, and a core tube connected in sequence. The core tube is used to obtain core samples during drilling. The wireline core sampling mechanism is used to remove the core tube from the borehole after core sampling. The gyroscope inclination measurement device is used to measure the overall azimuth data of the drilling tool after drilling and feed it back to the data receiving, storage and transmission module. The data receiving, storage and transmission module is used to set the build-up rate and send it to the build-up casing assembly. The probe tube assembly is mounted outside the transmission tube assembly and is used to detect the surrounding rock strata and geological structures during drilling. The data is then fed back to the data receiving, storage and transmission module for analysis to determine whether to adjust the inclination rate. The directional drilling sleeve assembly includes a directional drilling sleeve, a data controller installed outside the probe assembly, and multiple sets of directional drilling adjustment mechanisms. Each set of directional drilling adjustment mechanisms includes a first directional drilling adjustment component and a second directional drilling adjustment component, with the extension and retraction directions of the first and second directional drilling adjustment components being opposite and not on the same straight line. The directional drilling sleeve is located outside the directional drilling adjustment mechanism. The first directional drilling adjustment component includes a first drive mechanism and a first thrust plate, with the first thrust plate mounted on the extension and retraction end of the first drive mechanism. The second directional drilling adjustment component includes a second drive mechanism and a second thrust plate, with the second thrust plate mounted on the extension and retraction end of the second drive mechanism. When adjusting the directional drilling rate, the first drive mechanism drives the first thrust plate, and the second drive mechanism drives the second thrust plate, simultaneously applying pressure to the directional drilling sleeve to control its tilt angle. The data controller is used to receive adjustment commands from the data receiving, storage, and transmission module, controlling the synchronous extension and retraction of the first and second directional drilling adjustment components in different directional drilling adjustment mechanisms to adjust the attitude of the directional drilling sleeve, thereby achieving the required directional drilling rate adjustment and core sampling orientation adjustment. The tilting adjustment mechanism consists of at least four groups. The tilting adjustment first component and the tilting adjustment second component of each group are evenly distributed along the circumference of the auxiliary tube. By controlling the tilting adjustment first component and the tilting adjustment second component of different tilting adjustment mechanisms synchronously, the tilting rate adjustment of at least four coring positions can be achieved.

2. The directional coring drill bit according to claim 1, characterized in that, The transmission tube assembly includes a transmission drill rod and a drill bit. The transmission drill rod has a hollow structure, and the drill bit is mounted on one end of the transmission drill rod with an opening in the center for core sampling during core tube drilling.

3. The directional coring drill bit according to claim 1, characterized in that, The gyroscope inclination measurement device includes a gyroscope and a battery. The gyroscope is used to measure the overall orientation data of the drill bit and store it in the data receiving, storage and transmission module; the battery powers the gyroscope.

4. The directional coring drill bit according to claim 2, characterized in that, The detection tube assembly includes a detection component, a data transmission module, and an auxiliary tube that are fitted around the outside of the transmission drill rod, and the three are coaxially connected in sequence; the detection component is used to detect the surrounding rock strata and geological structures; The data transmission module is used to feed back the probe data to the data receiving, storage and transmission module; the auxiliary pipe is used to house the first tilting adjustment component, the second tilting adjustment component and the data controller.

5. The directional coring drill bit according to claim 4, characterized in that, The detection components include a transient electromagnetic measurement module, a resistivity measurement module, a gamma measurement module, an acoustic remote sensing module, and a power supply, which supplies power to each module.

6. The directional coring drill bit according to claim 4, characterized in that, The directional tube assembly also includes a drive power supply on the surface of the auxiliary tube and two hard rubber rings respectively mounted on both ends of the auxiliary tube. The directional tube is fitted onto the two hard rubber rings, allowing the directional tube to tilt and adjust the directional rate. The drive power supply is used to power the first directional adjustment component, the second directional adjustment component, and the data controller.

7. A coring method using a directional coring drill according to any one of claims 1 to 6, characterized in that, Includes the following steps: Step 1: Work preparation: On the ground, inspect and adjust the drilling tools, calibrate parameters, and preset the build-up rate and coring azimuth. Step 2, Drilling and Core Sampling: When drilling begins, the data controller receives adjustment instructions from the data receiving, storage and sending module, and controls the first and second components of the corresponding directional adjustment mechanism to adjust the attitude of the directional casing to the preset directional rate and core sampling position, and performs directional core sampling until the core tube is filled with rock sample. Step 3, Geological Exploration and Azimuth Determination: Drilling stops when the set position is reached. The gyroscope inclination device measures the azimuth data, and at the same time, the detection tube assembly performs geological exploration and transmits the azimuth data and geological data to the data receiving, storage and sending module for storage. Step 4: Obtain rock samples and exploration data: Lift the core tube assembly to the ground, retrieve the rock sample from the core tube, and obtain the orientation data and geological data from the data receiving, storage and transmission module; Step 5: Rock Sample and Exploration Data Analysis: Based on the rock samples, azimuth data, and geological data, invert the geological structural model to determine whether to adjust the build-up rate and core sampling azimuth. If no adjustment is needed, repeat steps 2 to 4 until directional core drilling in the area is completed. If it is necessary to maintain the core sampling azimuth and only adjust the build-up rate, proceed to step 7. If it is necessary to maintain the build-up rate and only adjust the core sampling azimuth, proceed to step 6. If it is necessary to adjust both the build-up rate and the core sampling azimuth simultaneously, proceed to steps 6 and 7 in sequence. Step 6: Drilling and coring azimuth adjustment: Set the required coring azimuth in the data receiving, storage and sending module. The data controller receives the adjustment data, controls the retraction of the previous directional adjustment mechanism, and controls the action of the directional adjustment mechanism corresponding to the required coring azimuth to adjust the coring azimuth and achieve the preset directional rate in Step 1. After completion, repeat Steps 2 to 5. Step 7, Inclination Rate Adjustment: Set the required inclination rate in the data receiving, storage and transmission module. The data controller receives the adjustment data and adjusts the first and second inclination adjustment components in the inclination adjustment mechanism corresponding to the current coring position to adjust to the set inclination rate. Then, repeat steps 2 to 5.

8. The coring method according to claim 7, characterized in that, In step four, rock samples, azimuth data, and geological data are collected more than 10 times.

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