An adjustable treatment device adapted for surveying a borehole wall cleaning

Abstract

The present application relates to the technical field of survey engineering equipment, in particular to an adjusting type processing device suitable for surveying and cleaning the hole wall of a drilling hole, comprising a steel pipe, a cleaning part, a guide limiting part, a rotating connection snap ring, a connecting disc and a threaded connection hole, the upper end of the rotating connection snap ring is rotatably connected in the middle of the bottom end of the steel pipe, and the connecting disc is fixedly connected to the bottom end of the rotating connection snap ring. The device is automatically centered and guided during lowering, has strong anti-stuck ability, the guide limiting part at the bottom of the device integrates a pressure sensor, an electric push rod and a centering moving wheel, and forms a closed-loop feedback system with a controller, can realize real-time sensing of the contact state of the device and the hole wall, automatically adjusts the extension amount in each direction, makes the device stable on the drilling hole axis, effectively avoids the front end from being blocked and stuck when lowering in a complex hole type, also ensures that the steel brush is in full contact with the hole wall, lays a foundation for efficient cleaning, and also enables the device to be stably lowered in drilling holes with different diameters.

Description

Technical Field

[0001] This invention relates to the field of exploration engineering equipment technology, specifically an adjustable processing device adapted for cleaning the borehole walls in exploration drilling. Background Technology

[0002] In the process of hydrogeological exploration, in order to accurately assess the permeability of the formation, such as the permeability coefficient, it is often necessary to conduct water pressure tests or water injection tests in the borehole. The basic principle is to apply a stable water pressure to a certain section of the borehole, measure the water absorption of the formation in that section, and then calculate the permeability and permeability coefficient of the formation. However, during drilling, especially when using rotary drilling with mud wall protection, solid particles in the drilling mud, such as bentonite, or self-generated mud during drilling of claystone, will adhere to a relatively dense, low-permeability mud skin or mud film on the surface of the formation. The presence of this mud skin is like covering the surface of the natural formation with a waterproof film, which will seriously hinder the normal infiltration of water. As a result, the formation permeability measured in the water pressure test is much lower than the actual situation of the formation, thus significantly underestimating the permeability performance of the formation, causing the test data to be distorted, and affecting the accuracy of engineering exploration and design. Therefore, an adjustable treatment device adapted to the cleaning of the borehole wall is needed to solve the above problems. Summary of the Invention

[0003] To address the problems in the prior art, the present invention provides an adjustable processing device adapted for cleaning the borehole walls of exploration drilling.

[0004] The technical solution adopted by the present invention to solve its technical problem is: an adjustable processing device adapted for cleaning the borehole wall of exploration drilling, including a steel pipe, a cleaning part, a guide limiting part, a rotating connecting ring, a connecting plate and a threaded connecting hole. The upper end of the rotating connecting ring is rotatably engaged with the middle of the bottom end of the steel pipe. The connecting plate is fixedly connected to the bottom end of the rotating connecting ring. The threaded connecting hole is opened in the middle of the connecting plate. The cleaning part is evenly arranged on the outer side end of the steel pipe. The guide limiting part is connected to the bottom end of the connecting plate.

[0005] Specifically, the cleaning unit includes a fixed mounting buckle, a side connecting plate, a steel brush, a fixing bolt, an inner buckle plate, and bolt holes. The inner buckle plate is slidably secured inside both ends of the fixed mounting buckle. The side connecting plate is fixedly connected to the outer end of the inner buckle plate opposite to the fixed mounting buckle. The steel brush is fixedly connected to the side connecting plate. The bolt holes are symmetrically formed through the inner buckle plate. The fixing bolt passes through the fixed mounting buckle and is threadedly connected to the bolt holes.

[0006] Specifically, the fixing buckle is fixedly connected to the outer end of the steel pipe, the threaded connection end is threaded into the inside of the threaded connection hole, and the bottom end of the steel pipe is filled with cement slurry.

[0007] Specifically, side mounting plates are fixedly installed on both sides of the side connecting plate, a cleaning and scraping block is slidably engaged on the steel brush, an adjusting and returning spring is symmetrically fixed between the side mounting plates and the cleaning and scraping block, and a counterweight is fixedly installed at the middle of both ends of the cleaning and scraping block.

[0008] Specifically, the guide limiting part includes a threaded connection end, a sealing cover plate, a centering moving wheel, a mounting bracket, a buffer spring, a pressure sensor, an electric push rod, a protective sealing frame, a fixed mounting plate, and a battery. The electric push rod is evenly fixed inside the protective sealing frame by the fixed mounting plate, and the telescopic front end of the electric push rod penetrates through the protective sealing frame. The battery is securely inserted into the protective sealing frame. The sealing cover plate is fixedly installed at the upper end of the protective sealing frame by bolts. The threaded connection end is fixedly connected to the middle of the upper end of the sealing cover plate. The pressure sensor is fixedly connected to the front end of the electric push rod. The mounting bracket is located outside the pressure sensor. The buffer spring is fixedly installed between the mounting bracket and the pressure sensor. The centering moving wheel is rotatably installed inside the mounting bracket on the side away from the buffer spring.

[0009] Specifically, a spherical end is fixedly connected to the bottom of the protective sealing frame, and a controller is installed inside the spherical end.

[0010] Specifically, the controller in the guide limiting part is electrically connected to the pressure sensor at the front end of each of the electric push rods to form a feedback control system. When the pressure value detected by the pressure sensor is lower than a preset threshold, the controller controls the corresponding electric push rod to extend and drive the centering moving wheel to press against the borehole wall until the pressure values ​​fed back by each pressure sensor are equal to the preset value, so that the steel pipe remains in a centered state in the borehole.

[0011] Specifically, the cleaning section is evenly distributed along the outer circumference of the steel pipe, and the scraping blade on the cleaning block is fitted to the outer end face of the steel brush.

[0012] Specifically, the upper end of the steel pipe is provided with a first connecting part, which includes a steel wire rope, a connecting buckle and a first fixed connecting plate. The connecting buckle is fixedly connected to the middle of the upper end of the first fixed connecting plate, the steel wire rope is connected to the connecting buckle, and the first fixed connecting plate is fixedly connected to the middle of the upper end of the steel pipe by fixing bolts.

[0013] Specifically, the upper end of the steel pipe is provided with a second connecting part, which includes a drill rod, a threaded connecting end, and a second fixed connecting plate. The threaded connecting end is fixedly connected to the middle of the upper end of the second fixed connecting plate, the bottom end of the drill rod is threadedly fixedly connected to the threaded connecting end, and the second fixed connecting plate is fixedly connected to the middle of the upper end of the steel pipe by fixing bolts.

[0014] The beneficial effects of this invention are: 1. During the lowering process, this invention features automatic centering and strong anti-jamming capability. The guide and limiting part at the bottom of the device integrates a pressure sensor, an electric push rod, and a centering moving wheel, forming a closed-loop feedback system with the controller. This system can sense the contact state between the device and the borehole wall in real time and automatically adjust the extension amount in each direction, stabilizing the device at the borehole axis. This effectively avoids the front end deflection and jamming when lowering the device into complex borehole shapes, and also ensures sufficient contact pressure between the steel brush and the borehole wall, laying the foundation for efficient cleaning. This also allows the device to be used stably in boreholes of different diameters.

[0015] II. The cleaning unit of this invention adopts a sliding locking design, that is, the inner locking plate cooperates with the fixed installation buckle and is locked by fixing bolts. According to different drilling holes, steel brushes of different sizes and materials can be easily disassembled and replaced for use, thereby accurately matching drilling holes of different diameters. This ensures that the working surface of the steel brush can closely and fully adhere to the mud skin of the hole wall. During use, steel brushes of different materials, such as steel wire hardness and toughness, can be quickly replaced according to the hardness of the formation and the properties of the mud skin, optimizing the cleaning effect. A self-cleaning mechanism consisting of a counterweight, a scraping block, and an adjusting return spring is set on the steel brush. When the device rotates at high speed intermittently, centrifugal force drives the scraping block to slide along the surface of the steel brush, scraping away the mud adhering between the bristles. When the rotation stops or decelerates, the spring returns it to its original position. The reciprocating motion of the scraping block can effectively prevent mud from hardening on the steel brush, maintain the cleanliness of the steel brush and the sharpness of scraping, thereby significantly extending the duration of a single operation, reducing the frequency of drilling and cleaning, and improving the overall operation efficiency.

[0016] III. This device adopts a modular design. The guide and limiting part can be quickly connected to the connecting plate via a threaded connection end. The cleaning part can be disassembled and assembled independently. The upper and lower ends of the steel pipe can be connected to the first or second connecting part respectively via a fixed connecting plate, making the device easy to transport, assemble, maintain, and replace parts. The dual-mode operation provides flexible application scenarios and offers two upper connection methods. The wire rope suspension mode is suitable for completed drilling and for specialized hole wall cleaning operations. The device can be moved up and down in the hole for scraping by a winch. The drill rod drive mode can be linked with the drilling rig. After drilling is completed or at a specific stage, the rotation and feed power of the drilling rig can be used to drive the device to rotate and lower or lift, achieving efficient rotational scraping. The two modes cover different construction processes and stage requirements. The bottom of the steel pipe is filled with cement slurry to increase the overall stability of the device. The spherical end of the guide and limiting part has a guiding function, which can better pass through obstacles or diameter changes in the hole, further enhancing the passability. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the main body in this invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the main body in this invention. Figure 2 ; Figure 3 This is a schematic diagram of the first connecting part structure in the present invention; Figure 4 This is a schematic diagram of the second connecting part structure in the present invention; Figure 5 This is a schematic diagram of the bottom structure of the steel pipe in this invention; Figure 6 This is a schematic diagram of the cleaning unit structure in the present invention; Figure 7 This is a schematic diagram of the disassembled state structure of the cleaning unit in this invention; Figure 8 This is a schematic diagram of the guide and limiting part structure in the present invention; Figure 9 This is a schematic diagram of the internal structure of the protective sealing frame in this invention.

[0019] In the diagram: 1-First connecting part, 2-Steel pipe, 3-Cleaning part, 4-Guide limiting part, 5-Second connecting part, 6-Steel wire rope, 7-Connecting buckle, 8-First fixed connecting plate, 9-Drill rod, 10-Threaded connection end, 11-Second fixed connecting plate, 12-Rotating connecting ring, 13-Connecting plate, 14-Threaded connection hole, 15-Fixed mounting buckle, 16-Side connecting plate, 17-Side mounting plate, 18-Adjusting return spring, 19-Scraping block, 20-Steel brush, 21-Counterweight block, 22-Fixed bolt, 23-Inner buckle plate, 24-Bolt hole, 25-Threaded connection end, 26-Sealing cover plate, 27-Centering moving wheel, 28-Mounting bracket, 29-Buffer spring, 30-Pressure sensor, 31-Electric push rod, 32-Spherical end, 33-Protective sealing frame, 34-Fixed mounting plate, 35-Battery. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0021] The invention will be further described below with reference to the accompanying drawings.

[0022] like Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7As shown, an adjustable treatment device adapted for cleaning the borehole wall of an exploration drill hole according to the present invention includes a steel pipe 2, a cleaning section 3, a guide and limiting section 4, a rotating connecting ring 12, a connecting plate 13, and a threaded connecting hole 14. The upper end of the rotating connecting ring 12 is rotatably engaged with the middle of the bottom end of the steel pipe 2. The connecting plate 13 is fixedly connected to the bottom end of the rotating connecting ring 12. The threaded connecting hole 14 is opened in the middle of the connecting plate 13. The cleaning section 3 is evenly distributed on the outer side end of the steel pipe 2. The guide and limiting section 4 is connected to the bottom end of the connecting plate 13. The cleaning section 3 includes a fixed mounting buckle 15, a side connecting plate 16, a steel brush 20, a fixing bolt 22, an inner buckle plate 23, and bolt holes 24. The inner buckle plate 23 is slidably engaged inside both ends of the fixed mounting buckle 15. The side connecting plate 16 is fixedly connected to the outer end of the inner buckle plate 23 away from the fixed mounting buckle 15. The steel brush 20 is fixedly connected to the side connecting plate 16. Bolt holes 24 are symmetrically opened through the inner buckle plate 23. The fixing bolt 22 passes through the fixing mounting buckle 15 and is threaded to the bolt hole (24). Side mounting plates 17 are fixedly installed on both sides of the side connecting plate 16. A cleaning block 19 is slidably engaged on the steel brush 20. Adjusting and resetting springs 18 are symmetrically fixed between the side mounting plate 17 and the cleaning block 19. Counterweights 21 are fixedly installed at the middle of both ends of the cleaning block 19. When the device rotates and generates centrifugal force, the cleaning block 19 can slide along the steel brush 20 and stretch the adjusting and resetting spring 18. After the rotation stops, the cleaning block 19 slides and resets along the steel brush 20 under the resetting pull of the adjusting and resetting spring 18. This allows the steel brush 20 to be automatically cleaned and can be used stably for a long time. In addition, steel brushes 20 of different sizes and materials can be easily replaced by turning the fixing bolt 22 according to the different drill holes.

[0023] like Figure 8 and Figure 9As shown, the guide limiting part 4 includes a threaded connection end 25, a sealing cover plate 26, a centering moving wheel 27, a mounting bracket 28, a buffer spring 29, a pressure sensor 30, an electric push rod 31, a protective sealing frame 33, a fixed mounting plate 34, and a battery 35. The electric push rod 31 is evenly fixed inside the protective sealing frame 33 by the fixed mounting plate 34, and the telescopic front end of the electric push rod 31 penetrates through the protective sealing frame 33. The battery 35 is securely inserted into the protective sealing frame 33. The sealing cover plate 26 is fixedly installed on the upper end of the protective sealing frame 33 by bolts. The threaded connection end 25 is fixedly connected to the middle of the upper end of the sealing cover plate 26. The pressure sensor 30 is fixedly connected to the front end of the electric push rod 31. The mounting bracket 28 is located on the outside of the pressure sensor 30. The buffer spring 29... The device is fixedly installed between the mounting bracket 28 and the pressure sensor 30. The centering moving wheel 27 is rotatably installed inside the mounting bracket 28 on the side away from the buffer spring 29. It can be stably and conveniently disassembled from the threaded connection hole 14 through the threaded connection end 25. The centering moving wheel 27 contacts the inner wall of the borehole, and the centering moving wheels 27 are evenly distributed, so that the device can move and run stably in the middle of the borehole. The device can be stably lowered and used in the center of each borehole. When the borehole is enlarged, the pressure detected by the pressure sensor 30 increases. At this time, the steel brush 20 drives the centering moving wheels 27 to move outward. When the pressure sensor 30 detects the preset pressure value, it means that the centering moving wheels 27 are in full contact with the inner wall of the borehole and are limited.

[0024] The bottom end of the protective sealing frame 33 is fixedly connected to a spherical end 32, and the inside of the spherical end 32 is equipped with a controller. The fixed installation buckle 15 is fixedly connected to the outer end of the steel pipe 2. The threaded connection end 25 is threaded into the inside of the threaded connection hole 14. The bottom end of the steel pipe 2 is filled with cement slurry, which serves as a counterweight.

[0025] The cleaning section 3 is evenly distributed along the outer periphery of the steel pipe 2. The scraping edge on the scraping block 19 is fitted with the outer end face of the steel brush 20, which allows the scraping block 19 to slide back and forth along the steel brush 20 when the device rotates at high speed, thus cleaning the dirt adhering to the steel brush 20.

[0026] The controller in the guide limit part 4 is electrically connected to the pressure sensor 30 at the front end of each electric push rod 31 to form a feedback control system. When the pressure value detected by the pressure sensor 30 is lower than the preset threshold, the controller controls the corresponding electric push rod 31 to extend and drive the centering moving wheel 27 to press against the borehole wall until the pressure values ​​fed back by each pressure sensor 30 are equal to the preset value, so that the steel pipe 2 remains in the center state in the borehole.

[0027] The upper end of the steel pipe 2 is provided with a first connecting part 1, which includes a steel wire rope 6, a connecting buckle 7 and a first fixed connecting plate 8. The connecting buckle 7 is fixedly connected to the middle of the upper end of the first fixed connecting plate 8. The steel wire rope 6 is connected to the connecting buckle 7, and the first fixed connecting plate 8 is fixedly connected to the middle of the upper end of the steel pipe 2 by fixing bolts. The device can be lifted by the steel wire rope 6 with the help of an external positioning frame and slide rail, and can run in the middle of the borehole.

[0028] The upper end of the steel pipe 2 is provided with a second connecting part 5. The second connecting part 5 includes a drill rod 9, a threaded connecting end 10, and a second fixed connecting plate 11. The threaded connecting end 10 is fixedly connected to the middle of the upper end of the second fixed connecting plate 11. The bottom end of the drill rod 9 is threadedly fixedly connected to the threaded connecting end 10. The second fixed connecting plate 11 is fixedly connected to the middle of the upper end of the steel pipe 2 by fixing bolts. The drill rod 9 can be threadedly connected to the threaded connecting end 10. With the help of the drill rod 9, this device can be connected to an external drilling machine, so that this device can rotate and operate inside the borehole.

[0029] Working Principle: This device can enter the borehole in two ways. First, the first connecting part 1 can be installed on the upper end of the steel pipe 2 and connected to the wire rope 6 via the connecting buckle 7. It can then be lowered to the designated depth in the borehole by an external winch. Alternatively, the second connecting part 5 can be installed on the upper end of the steel pipe 2 and connected to the drill rod 9 via its threaded connection end 10. Driven by the drilling rig, it can rotate and be lowered along with the drill bit. During the lowering process, the guide and limiting part 4 plays a crucial role. Its spherical end 32 at the bottom facilitates passage through sections with varying or partially reduced diameters. Multiple electric push rods 31, evenly arranged circumferentially within the protective sealing frame 33, have pressure sensors 30 at their front ends and a centrally located moving wheel 27. Each pressure sensor 30 connects to the spherical end 32 within the... The controller forms a closed-loop feedback system. When the device deviates from the borehole center or the borehole diameter is different, the pressure between the centering moving wheel 27 and the borehole wall will decrease, i.e., the pressure sensor reading is lower than the preset threshold. The controller then drives the electric push rod 31 on the side to extend, pushing the mounting bracket 28 and the centering moving wheel 27 to move outward until the pressure values ​​fed back by all pressure sensors 30 are restored and balanced to the preset value. This process ensures that the device always automatically adjusts and maintains the axis position of the borehole of different sizes, preventing it from getting stuck, ensuring smooth lowering and positioning, and also ensuring that each cleaning part 3 fully contacts the inner wall of the borehole. Each cleaning part 3 is fixed to the steel pipe 2 by the fixed mounting buckle 15, and the steel brush 20 is connected by the side connecting plate. 16 is connected to the inner clamping plate 23, and the fixing bolt 22 is inserted into the bolt hole 24 of the inner clamping plate 23 to lock it, so that the steel brush 20 can be easily fixed, installed and replaced. This allows steel brushes 20 of different materials and sizes to be adapted to boreholes of different diameters and to make close contact with the mud film on the borehole wall. When the device is lowered to the designated depth and position, the central moving wheels 27 are retracted, so that each cleaning part 3 makes priority and full contact with the inner wall. In the hoisting mode, the device can be reciprocated in the hole by pulling the steel wire rope 6 up and down, and the steel brush 20 scrapes and cleans the borehole wall. In the drilling linkage mode, the drilling rig drives the entire device to rotate, so that the steel brush 20 rotates and makes full contact with the borehole wall, destroying the mud film and realizing rotational scraping. The cleaning process is more efficient. During the rotation cleaning process, the design of the scraping block 19 enables the self-cleaning of the steel brush 20. When the device rotates at high speed, the counterweight 21, under the action of centrifugal force, drives the scraping block 19 to overcome the tension of the adjusting return spring 18 and slide outward along the surface of the steel brush 20. The scraping edge of the scraping block 19 can scrape off the dirt adhering between the bristles of the steel brush 20. When the rotation stops or the speed decreases, the centrifugal force decreases, the adjusting return spring 18 contracts, and the scraping block 19 is pulled back to the initial position. The reciprocating motion of the scraping block 19 can effectively prevent dirt from accumulating and hardening on the steel brush 20, maintain the cleanliness and scraping efficiency of the steel brush 20, and thus ensure that the device can work stably for a long time.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable processing device adapted for cleaning the borehole wall of an exploration borehole, comprising a steel pipe (2), a cleaning section (3), a guide and limiting section (4), a rotating connecting ring (12), a connecting disc (13), and a threaded connecting hole (14), characterized in that: The upper end of the rotating connecting ring (12) is rotatably engaged with the middle of the bottom end of the steel pipe (2). The connecting disc (13) is fixedly connected to the bottom end of the rotating connecting ring (12). The threaded connecting hole (14) is opened in the middle of the connecting disc (13). The cleaning part (3) is evenly arranged on the outer end of the steel pipe (2). The guide limiting part (4) is connected to the bottom end of the connecting disc (13).

2. The adjustable processing device adapted for cleaning the borehole wall of exploration drilling according to claim 1, characterized in that: The cleaning unit (3) includes a fixed mounting buckle (15), a side connecting plate (16), a steel brush (20), a fixing bolt (22), an inner buckle plate (23), and bolt holes (24). The inner buckle plate (23) is slidably locked inside both ends of the fixed mounting buckle (15). The side connecting plate (16) is fixedly connected to the outer end of the inner buckle plate (23) away from the fixed mounting buckle (15). The steel brush (20) is fixedly connected to the side connecting plate (16). The bolt holes (24) are symmetrically opened through the inner buckle plate (23). The fixing bolt (22) passes through the fixed mounting buckle (15) and is threadedly connected to the bolt holes (24).

3. The adjustable processing device adapted for cleaning the borehole wall of exploration drilling according to claim 2, characterized in that: The fixed mounting buckle (15) is fixedly connected to the outer end of the steel pipe (2), the threaded connection end (25) is threaded into the inside of the threaded connection hole (14), and the bottom end of the steel pipe (2) is filled with cement slurry.

4. The adjustable processing device adapted for cleaning the borehole wall of exploration drilling according to claim 2, characterized in that: Side mounting plates (17) are fixedly installed on both sides of the side connecting plate (16). A cleaning and scraping block (19) is slidably engaged on the steel brush (20). Adjustable and reset springs (18) are symmetrically fixed between the side mounting plate (17) and the cleaning and scraping block (19). A counterweight block (21) is fixedly installed at the middle of both ends of the cleaning and scraping block (19).

5. The adjustable processing device adapted for cleaning the borehole wall of exploration drilling according to claim 1, characterized in that: The guide limiting part (4) includes a threaded connection end (25), a sealing cover plate (26), a centering moving wheel (27), a mounting bracket (28), a buffer spring (29), a pressure sensor (30), an electric push rod (31), a protective sealing frame (33), a fixed mounting plate (34), and a battery (35). The electric push rod (31) is evenly fixed inside the protective sealing frame (33) by the fixed mounting plate (34), and the telescopic front end of the electric push rod (31) penetrates through the protective sealing frame (33). The battery (35) is securely inserted into the protective sealing frame (33). The sealing cover (26) is fixedly installed on the upper end of the protective sealing frame (33) by bolts. The threaded connection end (25) is fixedly connected to the middle of the upper end of the sealing cover (26). The pressure sensor (30) is fixedly connected to the front end of the electric push rod (31). The mounting bracket (28) is set on the outside of the pressure sensor (30). The buffer spring (29) is fixedly installed between the mounting bracket (28) and the pressure sensor (30). The centering moving wheel (27) is rotatably installed inside the mounting bracket (28) on the side away from the buffer spring (29).

6. The adjustable processing device adapted for cleaning the borehole wall of exploration drilling according to claim 5, characterized in that: The bottom end of the protective sealing frame (33) is fixedly connected to a spherical end (32), and a controller is provided inside the spherical end (32).

7. The adjustable processing device adapted for cleaning the borehole wall of exploration drilling according to claim 6, characterized in that: The controller in the guide limiting part (4) is electrically connected to the pressure sensor (30) at the front end of each of the electric push rods (31) to form a feedback control system. When the pressure value detected by the pressure sensor (30) is lower than the preset threshold, the controller controls the corresponding electric push rod (31) to extend and drive the centering moving wheel (27) to press against the borehole wall until the pressure values ​​fed back by each of the pressure sensors (30) are equal to the preset value, so that the steel pipe (2) remains in the center state in the borehole.

8. The adjustable processing device adapted for cleaning the borehole wall of exploration drilling according to claim 1, characterized in that: The cleaning section (3) is evenly distributed along the outer periphery of the steel pipe (2), and the scraping blade on the scraping block (19) is fitted to the outer end face of the steel brush (20).

9. The adjustable processing device adapted for cleaning the borehole wall of exploration drilling according to claim 1, characterized in that: The upper end of the steel pipe (2) is provided with a first connecting part (1), the first connecting part (1) includes a steel wire rope (6), a connecting buckle (7) and a first fixed connecting plate (8). The connecting buckle (7) is fixedly connected to the middle of the upper end of the first fixed connecting plate (8). The steel wire rope (6) is connected to the connecting buckle (7), and the first fixed connecting plate (8) is fixedly connected to the middle of the upper end of the steel pipe (2) by fixing bolts.

10. The adjustable processing device adapted for cleaning the borehole wall of exploration drilling according to claim 1, characterized in that: The upper end of the steel pipe (2) is provided with a second connecting part (5). The second connecting part (5) includes a drill rod (9), a threaded connecting end (10), and a second fixed connecting plate (11). The threaded connecting end (10) is fixedly connected to the middle of the upper end of the second fixed connecting plate (11). The bottom end of the drill rod (9) is threadedly fixedly connected to the threaded connecting end (10), and the second fixed connecting plate (11) is fixedly connected to the middle of the upper end of the steel pipe (2) by fixing bolts.

Images