Flexible bundling drill pipe and drilling process without extension rod

Abstract

The invention provides a flexible bunched drill pipe and a drilling process without extension rod, the flexible bunched drill pipe is integrated by a thick pipe and a plurality of rows of channels, the plurality of rows of channels are respectively used for laying cables and signal lines, conveying fluid into a drill hole and sucking drilling slag from the hole, and meanwhile, the flexible bunched drill pipe can be used for drilling and drilling. The flexible bunched drill pipe can be bent without being broken under the action of external force, and the integrated flexible bunched drill pipe is used for replacing a traditional rigid drill pipe for underground drilling. The working procedures of rod connecting and rod disassembling are omitted, the working efficiency and safety of underground drilling are improved, and drill burying accidents can be avoided.

Description

Technical Field

[0001] The present invention relates to the field of underground drilling technology and equipment, and in particular to a flexible cluster drill pipe and a connecting rod-free drilling process. Background Art

[0002] Most existing underground drilling technologies use rigid drill rods to transmit drilling torque and drilling pressure. When the drilling depth is greater than the height of the drilling tower, the drill rod needs to be connected when lowering the drill and the rod needs to be removed when pulling the drill out. These two processes not only consume a lot of time and manpower, reducing work efficiency, but also easily cause drill burial accidents due to the interruption of slag return fluid during the connection and removal of the rod.

[0003] In recent years, scholars both domestically and internationally have conducted extensive research addressing the shortcomings of traditional drilling techniques. While some new drilling technologies, such as hydraulic hammer drilling and air drilling, have improved drilling efficiency to a certain extent, they still cannot avoid the problems of connecting and removing rods. Coiled tubing drilling technology theoretically allows for drilling without connecting rods, but existing coiled tubing, with its single channel, presents practical challenges such as difficulty in slag return, difficulty in controlling the drilling direction, and insufficient weight on bit. Summary of the Invention

[0004] The purpose of the present invention is to solve the above technical problems, thereby providing a flexible cluster drill pipe and a drilling process without connecting rods; In order to solve the above technical problems, the present invention provides the following technical solutions: The first object of the present invention is to provide a flexible cluster drill pipe. The flexible cluster drill pipe is integrated with a thick pipe and multiple columns of channels, wherein the multiple columns of channels are used for laying cables and signal lines, transporting fluids into the borehole, and sucking drill cuttings from the hole. At the same time, the flexible cluster drill pipe can bend without breaking under the action of external force, and this integrated flexible cluster drill pipe is used to replace traditional rigid drill rods for underground drilling purposes.

[0005] Another object of the present invention is to provide a drilling process that does not require connecting rods, using flexible bundled drill pipes to replace traditional rigid drill rods for underground drilling operations. No connecting rods are required during the drilling process, and no rods need to be removed during the drilling process. Fluid can be continuously transported into the hole during both drilling and pulling out of the hole, without interrupting the flow.

[0006] Optionally, a fluid generating device, a drill pipe axial driver, a drill pipe guide fixing device, a drill bit, a down-the-hole power and a slag inlet device are used in conjunction with a flexible cluster drill pipe for drilling operations.

[0007] Optionally, the flexible cluster drill pipe is provided with a first channel and a second channel, the first channel is used to transport the material and energy required for drilling to the drill bit and the down-the-hole power and slag inlet device, the second channel is connected to the down-the-hole power and slag inlet device, and is used to receive and discharge drill cuttings, the fluid generating device is used to transport fluid into the hole or to suck drill cuttings from the hole, the drill pipe axial drive drives the flexible cluster drill pipe to drill down or lift, the guide fixing device is used to constrain the radial position of the flexible cluster drill pipe to ensure the stability of the drilling direction, the drill bit directly acts on the formation, the down-the-hole power and slag inlet provide power for the drill bit and collect drill cuttings, one end of the flexible cluster drill pipe is connected to the fluid generating device, and the other end is connected to the down-the-hole power and slag inlet device, the down-the-hole power and slag inlet device are connected to the drill bit or integrated with the drill bit, the drill pipe guiding fixing device and the drill pipe axial drive are both installed around the outer wall of the drill pipe.

[0008] Optionally, the drill pipe axial drive includes a drive chain and a holding mechanism. The holding mechanism is arranged on the drive chain and wrapped around the outer surface of the drill pipe. When the drive chain rotates, the holding mechanism is driven to clamp the outer surface of the drill pipe, and the drill pipe is driven to rise and fall through static friction.

[0009] Optionally, the down-the-hole power and slag inlet device is connected to or integrated with the drill bit, and the drill bit also includes one or more fluid nozzles, which are connected to the first type of channel and are used to provide fluid to the drill bit to assist drilling, and simultaneously flush and cool the drill bit, and help discharge drill cuttings from the borehole.

[0010] Optionally, the drill pipe guide fixture includes a distributed pressure sensor array and an adaptive adjustment mechanism, which dynamically adjusts the force application angle of the guide wheel by real-time monitoring of the circumferential contact pressure distribution of the drill pipe. The correction formula is:

[0011] where Δθ is the correction angle, Kp is the formation coupling coefficient, Pi is the real-time contact pressure of the i-th sensor, φi is the sensor circumferential angle, and P̅ is the average contact pressure.

[0012] Alternatively, a drilling process without an adapter comprises the following steps: S1. Flexible bundled drill pipe replaces traditional rigid drill pipe for underground drilling operations. This eliminates the need for connecting rods during drilling and removing rods during pull-out. Fluid can be continuously delivered to the hole during both drilling and pull-out. The flexible bundled drill pipe integrates a first-type channel for delivering the power medium and a second-type channel for slag removal. S2. The flexible bundled drill pipe is axially advanced by the drill pipe axial drive, which uses an adjustable speed drive to match the formation drilling resistance in real time. S3 during the drilling process by the distributed pressure sensor array to collect real-time data on the circumferential contact pressure distribution of the drill pipe, and dynamically adjust the force angle of the guide wheel to maintain a stable drilling axis; S4. The drill bit is driven by a down-the-hole power unit to cut the formation; S5. Continuous slag discharge is performed using the slag discharge port connected to the second type of channel; S6. After reaching the designed hole depth, maintain the integrity of the drill pipe and lift the drill to complete the full hole without connecting rods or removing rods.

[0013] In summary, the present invention has the following beneficial effects: The present invention does not require the rod connecting and removing processes, saves a lot of time and labor, can greatly improve the work efficiency of underground drilling, avoids drilling accidents caused by the interruption of slag return fluid during the rod connecting and removing processes, and improves the safety and reliability of drilling operations. It is expected to be applied to water conservancy project anti-seepage construction, pile foundation construction, mineral resource mining, geological exploration, trenchless pipeline laying and other fields, and has important practical significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a sectional view of the main structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the drill pipe of the present invention.

[0016] Explanation of the accompanying figures: 1-first type of channel; 2-second type of channel; 3-drill pipe axial drive; 4-drill pipe guiding and fixing device; 5-drill bit; 6-down-the-hole power and slag inlet device, 7-drive chain, 8-holding mechanism, 9-first fluid generating device, 10-second fluid generating device. DETAILED DESCRIPTION

[0017] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the new embodiments of the system. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0018] Example: like Figure 1-Figure 2 As shown, one object of the present invention is to provide a flexible cluster drill pipe, The flexible cluster drill pipe is integrated with a thick pipe and multiple columns of channels, wherein the multiple columns of channels are used for laying cables and signal lines, transporting fluids into the borehole, and sucking drill cuttings from the hole. At the same time, the flexible cluster drill pipe can bend without breaking under the action of external force, and this integrated flexible cluster drill pipe is used to replace traditional rigid drill rods for underground drilling purposes.

[0019] Another object of the present invention is to provide a drilling process that does not require connecting rods, using flexible bundled drill pipes to replace traditional rigid drill rods for underground drilling operations. No connecting rods are required during the drilling process, and no rods need to be removed during the drilling process. Fluid can be continuously transported into the hole during both drilling and pulling out of the hole, without interrupting the flow.

[0020] Optionally, a fluid generating device, a drill pipe axial driver 3, a drill pipe guide fixing device 4, a drill bit 5, a down-the-hole power and a slag inlet device 6 are used in conjunction with a flexible bundled drill pipe for drilling operations. The flexible cluster drill pipe is provided with a first channel 1 and a second channel 2. The first channel 1 is used to transport the required materials and energy to the drill bit 5 and the down-the-hole power and slag inlet device 6. The second channel 2 is connected to the down-the-hole power and slag inlet device 6 for receiving and discharging drill cuttings. The fluid generating device is used to transport fluid into the hole or to suck drill cuttings from the hole. The drill pipe axial driver 3 drives the flexible cluster drill pipe to drill down or lift. The guide fixing device is used to constrain the radial position of the flexible cluster drill pipe to ensure the stability of the drilling direction. The drill bit 5 acts directly on the formation. The down-the-hole power and slag inlet provide power for the drill bit 5 and collect drill cuttings. One end of the flexible cluster drill pipe is connected to the fluid generating device, and the other end is connected to the down-the-hole power and slag inlet device 6. The down-the-hole power and slag inlet device 6 is connected to the drill bit 5 or integrated with the drill bit 5. The drill pipe guide fixing device 4 and the drill pipe axial drive 3 are both installed around the outer wall of the drill pipe. The fluid generating device includes a first fluid generating device 9 and a second fluid generating device 10. The first fluid generating device 9 adopts a slurry pump or an air compressor, and the second fluid generating device 10 adopts a sand and gravel pump.

[0021] The first type of channel 1 serves as a channel for transporting power and materials, ensuring that the mud, power cables and high-pressure fluid required during the drilling process can smoothly reach the drill bit 5 and the down-the-hole power device. These materials and energy are the indispensable basis for drilling operations, and their stable supply is directly related to the drilling efficiency and success rate.

[0022] The second type of channel 2 is responsible for quickly discharging the drill cuttings generated during the drilling process out of the hole, avoiding the accumulation of drill cuttings in the hole, thereby ensuring the continuity and efficiency of drilling. The timely discharge of drill cuttings is a key factor in maintaining the working efficiency of the drill bit 5 and extending the service life of the drill bit 5.

[0023] The drill pipe axial driver 3 enables the drill pipe to be flexibly drilled down or lifted in the hole, adapting to different drilling depths and changes in formation conditions, thereby improving operational flexibility and drilling efficiency.

[0024] The drill pipe guide fixture 4 greatly reduces the deviation during the drilling process by ensuring the stability of the drilling direction, thereby improving the accuracy and quality of the drilling, which is particularly important for drilling operations over long distances and in complex formations.

[0025] The drill bit 5 is a key executive component in the drilling process and directly acts on the formation. Its performance directly affects the drilling speed and efficiency.

[0026] The down-the-hole power and slag inlet device 6 provides power to the drill bit 5 and collects drill cuttings at the same time, realizing the integration of drilling and slag discharge, and improving the integration and efficiency of the drilling operation.

[0027] Optionally, the drill pipe axial drive 3 includes a drive chain 7 and a holding mechanism 8. The holding mechanism 8 is arranged on the drive chain 7 and wrapped with the outer surface of the flexible bundle drill pipe. When the drive chain 7 rotates, the holding mechanism 8 is driven to clamp the outer surface of the flexible bundle drill pipe, and the flexible bundle drill pipe is driven to rise and fall by static friction. The drill pipe axial drive 3 has an adjustable speed function to adjust the drilling or lifting speed of the drill pipe according to actual needs during the drilling process.

[0028] The drill pipe axial drive 3 allows the drill pipe's lowering or lifting speed to be adjusted in real time according to the actual needs of the drilling process. When the formation conditions change or drilling resistance is encountered, the speed can be adjusted in time to optimize drilling efficiency and reduce energy waste, providing more options to adapt to different drilling environments and operational requirements.

[0029] The down-the-hole power and slag inlet device 6 is connected to or integrated with the drill bit 5. The drill bit 5 also includes one or more fluid nozzles, which are connected to the first type of channel 1 and are used to provide fluid to the drill bit 5 to assist drilling, and simultaneously flush and cool the drill bit 5, and carry the drill cuttings out of the borehole.

[0030] The fluid can more effectively break up the formation and increase the drilling speed. At the same time, the fluid can also flush and cool the drill bit 5, reduce the wear and damage of the drill bit 5, and extend its service life. During the drilling process, the fluid nozzle also helps to discharge the drill cuttings from the borehole, keeping the borehole clean and unobstructed, and further improving the continuity and efficiency of the drilling operation.

[0031] Optionally, the drill pipe guide fixture 4 includes a distributed pressure sensor array and an adaptive adjustment mechanism, which dynamically adjusts the force angle of the guide wheel by real-time monitoring of the circumferential contact pressure distribution of the drill pipe. The correction formula is:

[0032] where Δθ is the correction angle, Kp is the formation coupling coefficient, Pi is the real-time contact pressure of the i-th sensor, φi is the sensor circumferential angle, and P̅ is the average contact pressure.

[0033] The distributed pressure sensor array and adaptive adjustment mechanism in the drill pipe guide fixture 4 monitor the circumferential contact pressure distribution of the drill pipe in real time and dynamically adjust the force angle of the guide wheel, which significantly improves the accuracy and quality of drilling. It can promptly detect and correct deviations in the drilling process, avoiding drilling failure or quality degradation due to accumulated deviations. According to the pressure data monitored in real time, the adaptive adjustment mechanism can quickly adjust the force angle of the guide wheel to ensure the stability of the drilling axis, making the adjustment process more scientific and accurate, and improving the efficiency and accuracy of correction.

[0034] Optionally, the present invention provides a connecting rod-free drilling process, comprising the following steps: S1. Flexible bundled drill pipe replaces traditional rigid drill pipe for underground drilling operations. This eliminates the need for connecting rods during drilling and removing rods during pull-out. Fluid can be continuously delivered to the hole during both drilling and pull-out. The flexible bundled drill pipe integrates a first-type channel for delivering the power medium and a second-type channel for slag removal. S2. The flexible bundled drill pipe is axially advanced by the drill pipe axial drive, which uses an adjustable speed drive to match the formation drilling resistance in real time. S3 during the drilling process by the distributed pressure sensor array to collect real-time data on the circumferential contact pressure distribution of the drill pipe, and dynamically adjust the force angle of the guide wheel to maintain a stable drilling axis; S4. The drill bit is driven by a down-the-hole power unit to cut the formation; S5. Continuous slag discharge is performed using the slag discharge port connected to the second type of channel; S6. After reaching the designed hole depth, maintain the integrity of the drill pipe and lift the drill to complete the full hole without connecting rods or removing rods.

[0035] By means of continuous axial propulsion, continuous drilling of the entire hole section is achieved, which improves the efficiency and continuity of the drilling operation. According to the changes in the drilling resistance of the formation, the drilling or lifting speed of the drill pipe is adjusted in real time, which optimizes the drilling efficiency and energy utilization. By real-time monitoring and adjustment of the force application angle of the guide wheel, the stability of the drilling axis is maintained, and the accuracy and quality of the drilling are improved. By adjusting the jet speed of the fluid nozzle, the drilling efficiency and the service life of the drill bit 5 are optimized. The slag discharge structure realizes continuous slag discharge, which keeps the borehole clean and unobstructed.

[0036] The present application realizes efficient, accurate and reliable drilling operation by integrating multiple functional modules. Through the first type of channel 1, the system provides the drill bit 5 and the down-the-hole power device with necessary power and material support, such as mud, power cables, high-pressure fluid, etc. These materials and energy are the basis of drilling operations, ensuring that the drill bit 5 can work normally and break the formation. The second type of channel 2 is responsible for quickly discharging the drill cuttings generated during the drilling process out of the hole. Through the slag discharge structure, the continuity and stability of the slag discharge process are ensured to prevent the accumulation of drill cuttings in the hole and affect the drilling efficiency. The drill pipe axial drive 3 realizes the drilling or lifting of the drill pipe in the hole, and the adjustable speed Function, adjust the drilling or lifting speed according to the actual needs during the drilling process, adapt to changes in different formations and drilling conditions, the drill pipe guide fixing device 4 monitors the circumferential contact pressure distribution of the drill pipe in real time through the distributed pressure sensor array and the adaptive adjustment mechanism, dynamically adjusts the force application angle of the guide wheel, corrects the deviation during the drilling process, and maintains the stability of the drilling axis, the down-the-hole power and slag inlet device 6 provides power for the drill bit 5 and collects drill slag at the same time, the fluid nozzle provides high-pressure fluid to the drill bit 5 to assist drilling and flush and cool the drill bit 5, thereby extending the service life of the drill bit 5, and the fluid nozzle improves drilling efficiency and the service life of the drill bit 5.

[0037] During use, the present application starts the drill pipe axial drive 3 to slowly drill down to a predetermined depth. During the drilling process, the drill pipe guide fixture 4 monitors the circumferential contact pressure distribution of the drill pipe in real time, dynamically adjusts the force angle of the guide wheel, and maintains the stability of the drilling axis. When the drill bit 5 reaches the predetermined depth, the down-the-hole power device is started to provide power for the drill bit 5 to start drilling. At the same time, high-pressure fluid is provided to the drill bit 5 through the first type of channel 1 to assist drilling and flush and cool the drill bit 5. The drill cuttings generated during the drilling process are quickly discharged out of the hole through the second type of channel 2 to ensure the continuity and efficiency of drilling. According to the changes in the drilling formation and the real-time situation of the drilling resistance, the drilling or lifting speed of the drill pipe is adjusted to optimize the drilling efficiency. When the drilling reaches the predetermined depth or the drilling task is completed, the drill pipe axial drive 3 is started to slowly lift the drill pipe out of the hole. During the lifting process, the drill pipe guide fixture 4 continues to monitor and adjust the stability of the drilling axis to ensure the safe lifting of the drill pipe.

[0038] Through an integrated design, the present application combines multiple functional modules required in the drilling process, such as power, material transmission, cuttings discharge, axial propulsion and lifting, drilling direction control, and power and cuttings feeding of the drill bit 5, to form an efficient and coordinated working system, which greatly reduces the coordination time and energy loss between the various components and improves the overall efficiency of the drilling operation. The adjustable speed function of the drill pipe axial drive 3 allows the drilling or lifting speed to be flexibly adjusted according to the actual needs of the drilling process, adapts to changes in different formations and drilling conditions, and further optimizes the drilling efficiency. The fluid nozzle increases the drilling speed and the service life of the drill bit 5.

[0039] The drill pipe guide fixture 4 monitors the circumferential contact pressure distribution of the drill pipe in real time through a distributed pressure sensor array and an adaptive adjustment mechanism, dynamically adjusts the force angle of the guide wheel, effectively corrects deviations during drilling, maintains the stability of the drilling axis, and greatly improves the accuracy of drilling.

[0040] This application adopts a flexible cluster drill pipe as a continuous drilling unit. Through continuous axial propulsion, real-time matching of formation drilling resistance, dynamic adjustment of the guide wheel force angle, continuous slag discharge, etc., it realizes continuous operation without connecting rods in the entire hole section, avoids problems that may arise during the connecting rod process, and improves the reliability of the drilling operation. The design of the slag discharge structure ensures the continuity and stability of the slag discharge process, prevents the accumulation of drill cuttings in the hole that affects work efficiency, and further improves the efficiency of drilling.

[0041] While the down-the-hole power and slag inlet device 6 provides power to the drill bit 5, it also provides high-pressure fluid to the drill bit 5 through the fluid nozzle to flush and cool the drill bit 5, thereby reducing wear and damage to the drill bit 5 and extending the service life of the drill bit 5. The fluid nozzle further extends the service life of the drill bit 5.

[0042] This application greatly reduces the cost of drilling operations by optimizing many aspects such as improving drilling efficiency, enhancing drilling accuracy, improving drilling reliability and extending the service life of the drill bit 5. The drilling process without connecting rods reduces the time and cost consumption in the connecting rod process, improves operating efficiency and further reduces operating costs.

[0043] This application does not require the rod connection and removal processes, saving a lot of time and labor, and can greatly improve the work efficiency of underground drilling. It avoids drilling accidents caused by the interruption of slag return fluid during the rod connection and removal process, and improves the safety and reliability of drilling operations. It is expected to be applied to water conservancy project anti-seepage construction, foundation pile construction, mineral resource mining, geological exploration, trenchless pipeline laying and other fields, and has important practical significance.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A flexible cluster drill pipe, characterized in that: The flexible cluster drill pipe is integrated with a thick pipe and multiple columns of channels, wherein the multiple columns of channels are respectively used for laying cables and signal lines, conveying fluid into the borehole, and sucking drill cuttings from the borehole. At the same time, the flexible cluster drill pipe can bend without breaking under the action of external force, and this integrated flexible cluster drill pipe is used to replace traditional rigid drill rods for underground drilling purposes.

2. A drilling process without connecting rods, characterized in that: The flexible cluster drill pipe described in claim 1 is used to replace the traditional rigid drill rod for underground drilling operations. There is no need to connect the rods during the drilling process, and there is no need to remove the rods during the drilling process. Fluid can be continuously transported into the hole during both the drilling and drilling processes without interrupting the flow.

3. The connecting rod-free drilling process according to claim 2, characterized in that: The drilling operation is carried out by using a fluid generating device, a drill pipe axial driver, a drill pipe guide fixing device, a drill bit, a down-the-hole power and a slag inlet device in conjunction with a flexible cluster drill pipe.

4. The connecting rod-free drilling process according to claim 3, characterized in that: The flexible cluster drill pipe is provided with a first type of channel and a second type of channel. The first type of channel is used to transport the materials and energy required for drilling to the drill bit and the down-the-hole power and slag inlet device. The second type of channel is connected to the down-the-hole power and slag inlet device for receiving and discharging drill cuttings. The fluid generating device is used to transport fluid into the hole or to suck drill cuttings from the hole. The drill pipe axial driver drives the flexible cluster drill pipe to drill down or lift. The guide fixing device is used to constrain the radial position of the flexible cluster drill pipe to ensure the stability of the drilling direction. The drill bit directly acts on the formation. The down-the-hole power and slag inlet provide power for the drill bit and collect drill cuttings. One end of the flexible cluster drill pipe is connected to the fluid generating device, and the other end is connected to the down-the-hole power and slag inlet device. The down-the-hole power and slag inlet device are connected to the drill bit or integrated with the drill bit. The drill pipe guide fixing device and the drill pipe axial driver are both installed around the outer wall of the drill pipe.

5. The connecting rod-free drilling process according to claim 4, characterized in that: The drill pipe axial driver includes a driving chain and a holding mechanism. The holding mechanism is arranged on the driving chain and installed around the outer wall of the drill pipe. When the driving chain rotates, the holding mechanism is driven to clamp the outer surface of the drill pipe, and the drill pipe is driven to rise and fall through static friction.

6. The connecting rod-free drilling process according to claim 4, characterized in that: The drill pipe guide fixing device comprises a distributed pressure sensor array and an adaptive adjustment mechanism, which dynamically adjusts the force angle of the guide wheel by real-time monitoring of the circumferential contact pressure distribution of the drill pipe. The correction formula is: Where Δθ is the correction angle, Kp is the formation coupling coefficient, Pi is the real-time contact pressure of the i-th sensor, φi is the circumferential angle of the sensor, and P̅ is the average contact pressure.

7. The connecting rod-free drilling process according to claim 4, characterized in that: The down-the-hole power and slag inlet device is connected to or integrated with the drill bit. The drill bit also includes one or more fluid nozzles, which are connected to the first type of channel and are used to provide fluid to the drill bit to assist drilling, and simultaneously flush and cool the drill bit, and carry the drill cuttings out of the borehole.

8. The connecting rod-free drilling process according to claim 4, characterized in that: The following steps are involved: S1. A flexible cluster drill pipe is used to replace the traditional rigid drill pipe for underground drilling operations. No rod connection is required during the drilling process, and no rod removal is required during the drilling process. Fluid can be continuously transported into the hole during both the drilling and the drilling process. The flexible cluster drill pipe is integrated with a first channel for transporting power medium and a second channel for slag removal; S2. The flexible cluster drill pipe is axially advanced by the drill pipe axial drive, wherein the drill pipe axial drive adopts an adjustable speed drive mode to match the formation drilling resistance in real time; S3. During the drilling process, the distributed pressure sensor array collects the circumferential contact pressure distribution data of the drill pipe in real time, and dynamically adjusts the force angle of the guide wheel to keep the drilling axis stable; S4. The drill bit is driven by a down-the-hole power device to cut the formation; S5. Continuous slag discharge is performed by using the slag discharge port connected to the second type of channel; S6. After reaching the designed hole depth, the drill pipe integrity is maintained and the drill is lifted to complete the full-hole continuous operation without connecting rods or removing rods.

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