Downhole directional drilling ventilation drilling device and using method thereof

Abstract

The underground directional drilling ventilation drilling device comprises a moving device, a lifting mechanism is mounted on one side of the top of the moving device, an angle adjusting mechanism is connected to the power output end of the lifting mechanism, a guide mechanism is mounted at the power output end of the angle adjusting mechanism, and a driving device is slidably mounted on one side of the top of the guide mechanism; a drill rod is rotationally installed in the driving device, a drill bit is installed on one side of the drill rod, and a ventilation device is installed on the other side of the drill rod. The using method of the underground directional drilling ventilation drilling device comprises the following steps that S1, the moving device is arranged; S2, the air source is selected; S3, the height position and the angle position of the drilling rod are adjusted; S4, drilling is conducted;

Description

Technical Field

[0001] This invention belongs to the field of downhole directional drilling technology, specifically relating to a downhole directional drilling ventilation and drilling device and its usage method. Background Technology

[0002] In the field of directional drilling in coal mines, existing technologies generally employ hydraulic directional drilling. Its core principle involves using a high-pressure mud pump to output high-pressure clean water. This water drives a hydraulic screw motor at the bottom of the hole, rotating the drill bit to break up rock. Simultaneously, the high-pressure water carries drill cuttings out of the hole. However, hydraulic directional drilling consumes a large amount of water. The wastewater generated during construction contains a large amount of coal slime and rock cuttings, making secondary filtration and recycling difficult. Direct discharge also faces the problem of overloading the underground drainage system. Furthermore, coal slime cleaning requires additional manpower and resources, further increasing operating costs. Secondly, as the drilling depth increases, the pressure loss along the water supply pipeline increases linearly. To ensure the required water flow and pressure for drilling, the power of the high-pressure mud pump needs to be continuously increased. This not only leads to a surge in water and electricity costs but also requires additional personnel for pipeline laying and maintenance, significantly increasing labor costs. If drainage is inadequate... Immediately, water accumulation can easily lead to roadway flooding, and it can also threaten the insulation performance of underground electrical equipment, increasing the risk of electric shock. Furthermore, hydraulic directional drilling has extremely poor adaptability under special geological conditions. When operating in soft coal seams or mudstone layers, the continuously injected high-pressure water can seep into the pores of the coal and rock layers, causing the coal and rock layers to absorb water and expand or break down, making it impossible to form a stable borehole. This directly affects the achievement of gas drainage and exploration and drainage construction goals, and in more serious cases, it can easily lead to borehole collapse accidents. Once the drill rod is buried in a long and deep hole, it is extremely difficult to retrieve, often resulting in the loss of the drill and the scrapping of drill rods and other equipment, wasting a lot of manpower and resources. Moreover, the hydraulic method cannot effectively treat the gas in the drilling area, and the gas can easily accumulate in the hole, increasing the risk of gas explosion and hindering subsequent gas drainage and management. Therefore, there is an urgent need for an underground directional drilling ventilation and drilling device and its usage method to solve the above problems. Summary of the Invention

[0003] In view of the problems mentioned above in the background art, the purpose of this invention is to provide a downhole directional drilling ventilation and drilling device and its usage method.

[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows: A downhole directional drilling and ventilation device includes a moving device, a lifting mechanism installed on one side of the top of the moving device, an angle adjustment mechanism connected to the power output end of the lifting mechanism, a guide mechanism installed on the power output end of the angle adjustment mechanism, a drive device slidably installed on one side of the top of the guide mechanism, a drill rod rotatably installed inside the drive device, a drill bit installed on one side of the drill rod, and a ventilation device installed on the other side of the drill rod.

[0005] Furthermore, the mobile device includes a base, two sets of drive wheels are mounted on both sides of the base, and a track is installed between the two sets of drive wheels. This structural design ensures the stability of movement.

[0006] Furthermore, the lifting mechanism includes hydraulic cylinders mounted on both sides of the top of the base, and the power output ends of the hydraulic cylinders on both sides are connected to an angle adjustment mechanism. This structural design facilitates the height adjustment of the drill rod.

[0007] Furthermore, the angle adjustment mechanism includes a rotary reducer installed at the power output ends of the hydraulic cylinders on both sides, with a mounting base installed between the two rotary reducers, and the guide mechanism fixedly mounted on the mounting base. This structural design facilitates the adjustment of the drilling angle of the drill rod.

[0008] Further specifying, the guiding mechanism includes a guide rail mounted on a mounting base, a hydraulic cylinder mounted on one side of the top of the guide rail, a slide block connected to the power output end of the hydraulic cylinder, the slide block being slidably mounted on the guide rail, and the driving device mounted on the slide block. This structural design provides stable guiding motion.

[0009] Furthermore, the drive device includes a rotary head, and the drill rod is rotatably disposed within the rotary head. This structural design facilitates the rotation of the drill rod to break rocks and must meet the drilling process requirements such as speed regulation, reversal, and directional drilling.

[0010] Further specifying, the drill rod includes a main rod, with a pneumatic motor fixedly mounted on one side and rotatably mounted on a ventilation device on the other side. A threaded post is provided on the other side of the main rod, and an extension rod is threadedly connected to the main rod via the threaded post. One side of the extension rod has a threaded groove that mates with the threaded post. An extension threaded post is provided on the other side of the extension rod, and a secondary rod is connected to the extension rod via the extension threaded post. Both sides of the secondary rod have assembly threaded grooves; one side of the assembly threaded groove mates with the extension threaded post, and the other side of the assembly threaded groove is threadedly connected to the drill bit. The drill rod has an internal cavity, and the drill bit has several vent holes. This structural design facilitates extension according to actual usage requirements.

[0011] Furthermore, a clamp is installed on the outer side of the auxiliary rod, and the clamp is fixedly mounted on the guide rail. This structural design ensures the stability of the drill pipe during use.

[0012] Further specifying, the ventilation device includes a mounting box installed on a base, an assembly frame installed inside the mounting box, an external air source device installed on the top of the assembly frame, an air pipe connected to the input end of the external air source device, a first pipe connected to the output end of the external air source device, a first control valve installed on the first pipe, a self-contained air source device installed at the bottom of the assembly frame, a second pipe connected to the output end of the self-contained air source device, a second control valve installed on the second pipe, a third pipe connected to the output ends of the first and second pipes, a third control valve installed on the third pipe, a flexible tube connected to the output end of the third pipe, and a wind-driven motor connected to the input end of the flexible tube. The self-contained air source device is an air pump or air cylinder. This structural design facilitates ventilation.

[0013] A method for using a downhole directional drilling ventilation and drilling device, characterized by comprising the following steps: S1: First, place the mobile device at the location of the coal and rock strata where drilling is required underground; S2: Select an external air source device or a self-contained air source device according to the actual drilling requirements. When an external gas supply device is selected for use, it is connected to the gas inlet downhole via a gas pipe, allowing gas to be introduced into the external gas supply device through the gas pipe. The external gas supply device then delivers the gas to the drill pipe for use through the first pipeline. When the self-contained air source device is selected, the first control valve on the first pipeline is closed and the second control valve on the second pipeline is opened. The self-contained air source device delivers gas through the second pipeline into the third pipeline, and the third pipeline provides high-pressure air into the drill pipe. S3: Adjust the drilling height and angle of the drill rod by operating the lifting mechanism and the angle adjustment mechanism; S4: The rotary head drives the drill rod to rotate to break the coal and rock layers. At the same time, the hydraulic cylinder pushes the slide block, which slides along the guide rail. This causes the slide block to drive the rotary head, which in turn drives the drill rod to move and drill. S5: As the drilling depth increases, high-pressure air also reaches the drilling position of the drill bit through the extended inner cavity of the drill rod and is output from the exhaust port on the drill bit. The output high-pressure air can effectively discharge gas from the outside of the drill rod. At the same time, the high-pressure air infiltrates into the formation and also dilutes the concentration of gas to a certain extent.

[0014] The beneficial effects of this invention are as follows: This invention adopts pneumatic drilling, which simplifies pipeline laying, greatly reduces water costs, equipment power, and pipeline laying costs, and reduces the labor intensity of operators. It also reduces the generation of coal slime and effectively solves the problems of secondary treatment of water supply, slag discharge and sewage, drainage difficulties, and the difficulty in cleaning coal slime. At the same time, the pneumatic directional drilling method allows air to effectively penetrate into the gaps between strata particles. For soft strata, it reduces the risk of collapse caused by expansion or fracture of coal and rock layers due to high-pressure water erosion, and also reduces the risk of roadway flooding. For coal seams with gas, the gas can be discharged by high-pressure air and continuously diluted by high-pressure air, which can reduce the gas concentration to a certain extent, improve drilling safety, reduce risks, and promote gas drainage and treatment. Attached Figure Description

[0015] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings; Figure 1 This is a schematic diagram of a downhole directional drilling ventilation and drilling device according to an embodiment of the present invention; Figure 2 This is a schematic cross-sectional view of the drill rod and ventilation device of a downhole directional drilling ventilation and drilling device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the usage state of a downhole directional drilling ventilation and drilling device according to an embodiment of the present invention; The symbols for the main components are explained below: 1. Mobile device; 2. Lifting mechanism; 3. Angle adjustment mechanism; 4. Guide mechanism; 5. Drive device; 6. Drill rod; 7. Drill bit; 8. Ventilation device; 9. Base; 10. Drive wheel; 11. Track; 12. Hydraulic cylinder; 13. Rotary reducer; 14. Guide rail; 15. Cylinder; 16. Slide seat; 17. Rotary head; 18. Main rod; 19. Pneumatic motor; 20. Threaded column; 21. Extension rod; 22. Threaded groove; 23. Extension threaded column; 24. Secondary rod; 25. Assembly threaded groove; 26. Cavity; 27. Exhaust hole; 28. Clamp; 29. ​​Mounting box; 30. Assembly frame; 31. External air source device; 32. First pipeline; 33. First control valve; 34. Self-contained air source device; 35. Second control valve; 36. Third pipeline; 37. Third control valve; 38. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Example 1, such as Figure 1 , Figure 2 and Figure 3As shown, a downhole directional drilling ventilation and drilling device includes a lifting mechanism 2 installed on one side of the top of a mobile device 1. An angle adjustment mechanism 3 is connected to the power output end of the lifting mechanism 2. A guide mechanism 4 is installed on the power output end of the angle adjustment mechanism 3. A drive device 5 is slidably installed on one side of the top of the guide mechanism 4. A drill rod 6 is rotatably installed inside the drive device 5. A drill bit 7 is installed on one side of the drill rod 6. A ventilation device 8 is installed on the other side of the drill rod 6.

[0018] In this embodiment, during use, the moving device 1 drives the lifting mechanism 2, angle adjustment mechanism 3, guide mechanism 4, drive device 5, drill rod 6, drill bit 7, and ventilation device 8 to move. During directional drilling, the drive device 5 drives the drill rod 6, which in turn drives the drill bit 7 to rotate, initiating the drilling operation. During drilling, the guide mechanism 4 drives the drill rod 6 to move laterally, controlling the drilling depth. Simultaneously, the lifting mechanism 2 can be activated, causing it to drive the angle adjustment mechanism 3, guide mechanism 4, drive device 5, and drill rod 6. The drill bit 7 moves up and down to adjust the height of the borehole, and the angle adjustment mechanism 3 can also be controlled. The angle adjustment mechanism 3 drives the guide mechanism 4, drive device 5, drill rod 6 and drill bit 7 to change the drilling angle and improve the drilling effect. During the drilling process, high-pressure air provided by the ventilation device 8 is delivered into the drill rod 6 and delivered from the drill bit 7 through the drill rod 6. The high-pressure air can discharge the gas in the hole from the outside of the drill rod 6. At the same time, the high-pressure air seeps into the stratum and dilutes the concentration of gas to a certain extent.

[0019] The pneumatic directional drilling method can utilize the drilling rig's own electricity to power the air pump, or use existing underground air sources for drilling. Pipeline laying is also relatively simple, significantly reducing water costs, equipment power, and pipeline laying costs, as well as alleviating the labor intensity of operators. It also reduces coal slurry production, effectively solving problems related to water supply, secondary treatment of slag and wastewater, drainage difficulties, and the difficulty in cleaning coal slurry. Furthermore, the pneumatic directional drilling method allows air to effectively penetrate into the intergranular spaces of the formation. For soft formations, this reduces the risk of collapse caused by high-pressure water erosion leading to expansion or fracturing of the coal and rock layers, and also reduces the risk of roadway flooding. For gaseous coal seams, the high-pressure air can expel the gas, and the continuous dilution through high-pressure air can reduce the gas concentration to a certain extent, improving drilling safety, reducing risks, and promoting gas drainage and control.

[0020] Among them, drilling with fluid can easily cause expansion or breakage, leading to the risk of collapse, which can result in the drill rod being buried or even the drill being lost. However, when drilling with a pneumatic directional drilling device, the drill rod is less likely to be buried in the stratum, reducing the workload of workers in retrieving buried drill rods and reducing the cost of losing drill rods.

[0021] Example 2, as Figure 1 and Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: the mobile device 1 includes a base 9, two sets of drive wheels 10 are installed on both sides of the base 9, and a track 11 is installed between the two sets of drive wheels 10.

[0022] In this embodiment, during use, the drive wheel 10 drives the track 11 to move. The track 11 increases its ground contact area, reducing the ground pressure to 10-20 kPa, effectively preventing sinking and ensuring stable movement. Example 3, as Figure 1 and Figure 3 As shown, this embodiment adds the following structure to the embodiment 1: the lifting mechanism 2 includes hydraulic cylinders 12 installed on both sides of the top of the base 9, and the power output ends of the hydraulic cylinders 12 on both sides are connected to the angle adjustment mechanism 3.

[0023] In this embodiment, during use, the angle adjustment mechanism 3 is driven by the hydraulic cylinder 12 to move up and down, so that the angle adjustment mechanism 3, the guide mechanism 4, the drive device 5, the drill rod 6 and the drill bit 7 move up and down to adjust the height of the drill hole.

[0024] Example 4, as Figure 1 and Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: the angle adjustment mechanism 3 includes a rotary reducer 13 installed at the power output end of the hydraulic cylinders 12 on both sides, an assembly seat is installed between the rotary reducers 13 on both sides, and the guide mechanism 4 is fixedly installed on the assembly seat.

[0025] In this embodiment, when it is necessary to perform oblique drilling, the rotary reducer 13 is controlled to drive the assembly seat, which in turn drives the guide mechanism 4. The guide mechanism 4 then drives the drive device 5, drill rod 6, and drill bit 7 to adjust their angles so that oblique drilling can be performed after the angle adjustment.

[0026] Example 5, as Figure 1 and Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: the guide mechanism 4 includes a guide rail 14, the guide rail 14 is mounted on the mounting base, a hydraulic cylinder 15 is mounted on one side of the top of the guide rail 14, the power output end of the hydraulic cylinder 15 is connected to a slide block 16, the slide block 16 is slidably mounted on the guide rail 14, and the drive device 5 is mounted on the slide block 16.

[0027] In this embodiment, during use, the hydraulic cylinder 15 pushes the slide block 16, causing the slide block 16 to slide along the guide rail 14, thereby driving the drive device 5, and the drive device 5 drives the drill rod 6 to move and drill.

[0028] Example 6, as Figure 1 and Figure 3 As shown, this embodiment adds the following structure to the embodiment 1: the drive device 5 includes a rotary head 17, and the drill rod 6 is rotatably disposed inside the rotary head 17.

[0029] In this embodiment, the core function of the rotary device 17 is to provide a reasonable rotational speed and torque. During use, the rotary device 17 drives the drill rod 6 to rotate to break the coal and rock layers, thereby achieving the drilling effect.

[0030] Example 7, as Figure 1 , Figure 2 and Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: the drill rod 6 includes a main rod 18, a pneumatic motor 19 is fixedly installed on one side of the main rod 18, and the other side of the pneumatic motor 19 is rotatably installed on the ventilation device 8. A threaded post 20 is provided on the other side of the main rod 18, and an extension rod 21 is threadedly connected to the main rod 18 through the threaded post 20. A threaded groove 22 is provided on one side of the extension rod 21, and the threaded groove 22 cooperates with the threaded post 20. An extension threaded post 23 is provided on the other side of the extension rod 21, and a secondary rod 24 is connected to the extension rod 21 through the extension threaded post 23. Both sides of the secondary rod 24 are provided with mounting threaded grooves 25. One side of the mounting threaded groove 25 cooperates with the extension threaded post 23, and the other side of the mounting threaded groove 25 is threadedly connected to the drill bit 7. A cavity 26 is provided inside the drill rod 6, and several vent holes 27 are provided on the drill bit 7.

[0031] In this embodiment, during use, when the main rod 18 is rotated by the rotary device 17, the internal part of the pneumatic motor 19 also rotates, converting the air pressure energy output by the ventilation device 8 into rotational air energy, so that the high-pressure air can flow quickly in the main rod 18, extension rod 21 and auxiliary rod 24, and finally output through the exhaust hole 27 on the drill bit 7. When the main rod 18 first drives the auxiliary rod 24, and the auxiliary rod 24 drives the drill bit 7 to drill a certain distance in the coal and rock layer, the guide mechanism 4 drives the drive device 5, and the drive device 5 drives the main rod 18. After the main rod 18 drives the auxiliary rod 24 out of the coal and rock layer, the auxiliary rod 24 can be rotated to make the auxiliary rod 24 detach from the main rod 18. Then, the extension rod 21 is installed between the main rod 18 and the auxiliary rod 24. The extension rod 21 is threadedly connected to the threaded post 20 on the main rod 18 and the assembly threaded groove 25 on the auxiliary rod 24 through the threaded grooves 22 on both sides and the extension threaded post 23, thereby increasing the length and facilitating the drilling of the drill bit 7.

[0032] Among them, the threaded post 20, threaded groove 22, extended threaded post 23, and assembly threaded groove 25 are all designed with tapered thread structure. Through the tapered thread connection, the tightening torque can be precisely controlled by a torque wrench. At the same time, the good axis alignment ensures the alignment of the installation and improves the subsequent drilling effect.

[0033] Example 8, as Figure 1 and Figure 3 As shown, this embodiment adds the following structure to the embodiment 1: a clamp 28 is installed on the outer side of the auxiliary rod 24, and the clamp 28 is fixedly installed on the guide rail 14.

[0034] In this embodiment, during use, the clamp 28 can suppress vibration and displacement of the drill pipe 6 during high-intensity operations, thereby improving the stability of the drill pipe 6 during use. Example 9, as Figure 1 , Figure 2 and Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: the ventilation device 8 includes a mounting box 29 mounted on the base 9, an assembly frame 30 is installed inside the mounting box 29, an external air source device 31 is installed on the top of the assembly frame 30, an air pipe is connected to the input end of the external air source device 31, a first pipe 32 is connected to the output end of the external air source device 31, a first control valve 33 is installed on the first pipe 32, a self-contained air source device 34 is installed at the bottom of the assembly frame 30, a second pipe 35 is connected to the output end of the self-contained air source device 34, a second control valve 36 is installed on the second pipe 35, a third pipe 37 is connected to the output ends of the first pipe 32 and the second pipe 35, a third control valve 38 is installed on the third pipe 37, a flexible pipe is connected to the output end of the flexible pipe, and the output end of the flexible pipe is connected to the input end of the pneumatic motor 19. The self-contained air source device 34 is an air pump or an air cylinder.

[0035] In this embodiment, during drilling, the external air source device 31 or the self-contained air source device 34 of the ventilation device 8 can be selected according to the actual situation. When the external air source device 31 is selected, it is connected to the gas inlet in the well through the air pipe, so that the gas is input into the external air source device 31 through the air pipe and then transported to the drill pipe 6 through the first pipe 32. When the self-contained air source device 34 is used, the first control valve 33 on the first pipe 32 is closed and the second control valve 36 on the second pipe 35 is opened. The self-contained air source device 34 transports the gas into the third pipe 37 through the second pipe 35, and the third pipe 37 provides high-pressure air into the drill pipe 6. As the drilling depth increases, the high-pressure air also reaches the drilling position of the drill bit 7 through the extended rod 21 and is output from the exhaust hole 27 on the drill bit 7. The output high-pressure air can effectively discharge the gas from the outside of the drill pipe 6. At the same time, the high-pressure air infiltrates into the formation and dilutes the concentration of the gas to a certain extent.

[0036] In actual use, the built-in air source device 34 can be used with an air pump or an air cylinder.

[0037] A method for using a downhole directional drilling ventilation and drilling device, characterized by comprising the following steps: S1: First, place the mobile device 1 at the location of the coal and rock strata where drilling is required underground; S2: Select either an external air source device 31 or a self-contained air source device 34, depending on the actual drilling requirements. When the external gas source device 31 is selected for use, it is connected to the gas inlet downhole via a gas pipe, allowing gas to be input into the external gas source device 31 through the gas pipe, and then transported by the external gas source device 31 to the drill pipe 6 for use through the first pipeline 32. When the self-contained air source device 34 is selected, the first control valve 33 on the first pipeline 32 is closed, and the second control valve 36 on the second pipeline 35 is opened. The self-contained air source device 34 delivers gas through the second pipeline 35 into the third pipeline 37, and the third pipeline 37 provides high-pressure air into the drill pipe 6. S3: By operating the lifting mechanism 2 and the angle adjustment mechanism 3, the drilling height and angle position of the drill rod 6 are adjusted; S4: The rotary head 17 drives the drill rod 6 to rotate to break the coal and rock layers. At the same time, the hydraulic cylinder 15 pushes the slide 16, so that the slide 16 slides along the guide rail 14, thereby driving the rotary head 17, and the rotary head 17 drives the drill rod 6 to move and drill. S5: As the drilling depth of drill rod 6 increases, high-pressure air also reaches the drilling position of drill bit 7 through the inner cavity of the extended rod 21 and is output from the exhaust port 27 on drill bit 7. The output high-pressure air can effectively discharge gas from the outside of drill rod 6. At the same time, the high-pressure air infiltrates into the formation and dilutes the concentration of gas to a certain extent.

[0038] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A downhole directional drilling and ventilation device, comprising a moving device (1), characterized in that: A lifting mechanism (2) is installed on one side of the top of the mobile device (1). An angle adjustment mechanism (3) is connected to the power output end of the lifting mechanism (2). A guide mechanism (4) is installed on the power output end of the angle adjustment mechanism (3). A drive device (5) is slidably installed on one side of the top of the guide mechanism (4). A drill rod (6) is rotatably installed inside the drive device (5). A drill bit (7) is installed on one side of the drill rod (6). A ventilation device (8) is installed on the other side of the drill rod (6).

2. The downhole directional drilling ventilation and drilling device according to claim 1, characterized in that: The mobile device (1) includes a base (9), two sets of drive wheels (10) are installed on both sides of the base (9), and a track (11) is installed between the two sets of drive wheels (10).

3. The downhole directional drilling ventilation and drilling device according to claim 2, characterized in that: The lifting mechanism (2) includes hydraulic cylinders (12) installed on both sides of the top of the base (9), and the power output ends of the hydraulic cylinders (12) on both sides are connected to an angle adjustment mechanism (3).

4. The downhole directional drilling ventilation and drilling device according to claim 3, characterized in that: The angle adjustment mechanism (3) includes a rotary reducer (13) installed at the power output end of the hydraulic cylinders (12) on both sides, and an assembly seat is installed between the rotary reducers (13) on both sides. The guide mechanism (4) is fixedly installed on the assembly seat.

5. The downhole directional drilling ventilation and drilling device according to claim 4, characterized in that: The guiding mechanism (4) includes a guide rail (14), which is mounted on a mounting base. A hydraulic cylinder (15) is mounted on one side of the top of the guide rail (14). The power output end of the hydraulic cylinder (15) is connected to a slide block (16), which is slidably mounted on the guide rail (14). The driving device (5) is mounted on the slide block (16).

6. The downhole directional drilling ventilation and drilling device according to claim 5, characterized in that: The drive device (5) includes a rotary head (17), and the drill rod (6) is rotatably disposed within the rotary head (17).

7. A downhole directional drilling ventilation and drilling device according to claim 6, characterized in that: The drill rod (6) includes a main rod (18), on one side of which a pneumatic motor (19) is fixedly mounted, and on the other side of which the pneumatic motor (19) is rotatably mounted on a ventilation device (8). A threaded post (20) is provided on the other side of the main rod (18), and an extension rod (21) is threadedly connected to the main rod (18) via the threaded post (20). A threaded groove (22) is provided on one side of the extension rod (21), and the threaded groove (22) engages with the threaded post (20). An extension threaded post (23) is provided on the other side of the long rod (21). The extension rod (21) is connected to a secondary rod (24) through the extension threaded post (23). Both sides of the secondary rod (24) are provided with assembly threaded grooves (25). One side of the assembly threaded groove (25) is engaged with the extension threaded post (23), and the other side of the assembly threaded groove (25) is threadedly connected to the drill bit (7). The drill rod (6) is provided with a cavity (26), and the drill bit (7) is provided with several vent holes (27).

8. The downhole directional drilling ventilation and drilling device according to claim 7, characterized in that: A clamp (28) is installed on the outside of the auxiliary rod (24), and the clamp (28) is fixedly installed on the guide rail (14).

9. A downhole directional drilling ventilation and drilling device according to claim 8, characterized in that: The ventilation device (8) includes a mounting box (29) installed on a base (9), an assembly frame (30) installed inside the mounting box (29), an external air source device (31) installed on the top of the assembly frame (30), an air pipe connected to the input end of the external air source device (31), a first pipe (32) connected to the output end of the external air source device (31), a first control valve (33) installed on the first pipe (32), and a self-contained air source device (34) installed at the bottom of the assembly frame (30). The output end of the self-contained air source device (34) is connected to a second pipe (35), and a second control valve (36) is installed on the second pipe (35). The output ends of the first pipe (32) and the second pipe (35) are connected to a third pipe (37), and a third control valve (38) is installed on the third pipe (37). The output end of the third pipe (37) is connected to a flexible pipe, and the output end of the flexible pipe is connected to the input end of the wind-driven motor (19). The self-contained air source device (34) is an air pump or an air cylinder.

10. A method of using the downhole directional drilling ventilation and drilling device according to any one of claims 1 to 9, characterized in that: Includes the following steps: S1: Deploy the mobile device. First, deploy the mobile device (1) at the location of the coal and rock layer where drilling is required underground. S2: Select the gas source. Based on the actual drilling requirements, select an external gas source device (31) or a self-contained gas source device (34). When the external gas source device (31) is selected for use, it is connected to the gas inlet in the well through a gas pipe, so that the gas is input into the external gas source device (31) through the gas pipe, and then transported by the external gas source device (31) to the drill pipe (6) through the first pipeline (32) for use. When the self-contained air source device (34) is selected, the first control valve (33) on the first pipeline (32) is closed, and the second control valve (36) on the second pipeline (35) is opened. The self-contained air source device (34) delivers gas through the second pipeline (35) into the third pipeline (37), and the third pipeline (37) provides high-pressure air into the drill rod (6). S3: Adjust the height and angle of the drill rod. By operating the lifting mechanism (2) and the angle adjustment mechanism (3), adjust the drilling height and angle of the drill rod (6). S4: Drilling, the rotary head (17) drives the drill rod (6) to rotate to break the coal and rock layer, while the oil cylinder (15) pushes the slide (16) so that the slide (16) slides along the guide rail (14), thereby the slide (16) drives the rotary head (17), and the rotary head (17) drives the drill rod (6) to move and drill. S5: Exhaust air. As the drilling depth of the drill rod (6) increases, the high-pressure air also reaches the drilling position of the drill bit (7) through the inner cavity of the extended rod (21) and is output from the exhaust hole (27) on the drill bit (7). The output high-pressure air can effectively exhaust the gas from the outside of the drill rod (6). At the same time, the high-pressure air infiltrates into the formation and also dilutes the concentration of gas to a certain extent.

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