Hydrogeological drilling layered water-stopping device and method

Abstract

The application provides a hydrogeological drilling layered water-stopping device and method. The water-stopping device comprises a drill bit and a drill pipe, the outer side of the drill pipe is provided with a plurality of arc-shaped water-stopping plates, the plurality of arc-shaped water-stopping plates are arranged in a circumferential annular array along the drill pipe, adjacent arc-shaped water-stopping plates are fixedly connected through elastic arc-shaped water-stopping belts, and a plurality of insertion tubes are dispersedly arranged on the outer wall of the arc-shaped water-stopping plates; a driving device for pushing the arc-shaped water-stopping plates outward is arranged in the drill pipe, and the driving device is connected with the arc-shaped water-stopping plates through at least two groups of transmission mechanisms. The drill bit is drilled downward from the ground, the arc-shaped water-stopping plates and the arc-shaped water-stopping belts are outwardly moved and attached to the hole wall, and the insertion tubes are fixed on the hole wall of the drill hole to stop water, so that the water is effectively stopped, and the water gushing out in the drilling process enters the water storage tank through the water inlet channel, and then the water is pumped away and discharged through the driving pipe, so that the hole is prevented from being blocked by water.

Description

Technical Field

[0001] This invention relates to the field of water-stopping devices, and more particularly to a layered water-stopping device for hydrogeological drilling and its method of use. Background Technology

[0002] Drilling or exploration is the use of deep drilling mechanical engineering technology to extract natural resources underground or on the seabed, or to take geological profiles and collect physical samples to provide experiments and obtain relevant data.

[0003] In hydrogeological exploration drilling, drilling equipment is often used to drill holes in the ground. For example, patent application number 202023337161.X discloses a geological drilling device, which consists of a vehicle body, a support frame, a fixed frame, and a drill bit. The vehicle body moves the support frame, the fixed frame is jacked up and down and mounted on the support frame, and a drive assembly is installed on the fixed frame. The drill bit is rotatably mounted on the fixed frame, and the drive assembly drives the drill bit to rotate for drilling. Using the geological drilling device of this application, when the geological drilling device needs to be moved, the fixed frame can be raised and lowered to adjust the height of the drill bit for drilling, and the vehicle body can move the drilling tools to the required drilling position, achieving rapid movement and rapid drilling, improving drilling efficiency and saving drilling time.

[0004] However, the aforementioned drilling equipment and similar drilling equipment often experience groundwater seepage during the drilling process, causing the borehole to be blocked by water. Furthermore, water seepage can occur at various strata, necessitating the design of a universal water-stopping device applicable to all strata. Summary of the Invention

[0005] The purpose of this invention is to provide a layered water-stopping device and method for hydrogeological drilling to solve the above-mentioned technical problems.

[0006] To solve the above-mentioned technical problems, this invention provides a layered water-stopping device for hydrogeological drilling, including a drill bit and a drill pipe, wherein the diameter of the drill pipe is smaller than that of the drill bit. A cover plate is provided on the top of the drill pipe, and a coupling is fixed on the top of the cover plate. Multiple arc-shaped water-stopping plates are provided on the outer side of the drill pipe, and the multiple arc-shaped water-stopping plates are arranged in a circular array along the circumference of the drill pipe. Adjacent arc-shaped water-stopping plates are fixedly connected by elastic arc-shaped water-stopping strips to form a telescopic cylindrical water-stopping structure sleeved on the outer wall of the drill pipe. Multiple insertion tubes are distributed on the outer wall of the arc-shaped water-stopping plates, and the length of two insertion tubes and the total length of the drill pipe diameter are less than or equal to the diameter of the largest part of the drill bit. A driving device for pushing the arc-shaped water-stopping plates outward is provided inside the drill pipe. The driving device is connected to the arc-shaped water-stopping plates through at least two sets of transmission mechanisms, and drives the telescopic cylindrical water-stopping structure composed of multiple arc-shaped water-stopping plates and arc-shaped water-stopping strips to extend and tightly adhere to the borehole wall through the transmission mechanisms, and is fixed to the borehole wall by the insertion tubes to stop water.

[0007] The preferred technical solution of the present invention is as follows: The driving device includes a driving tube vertically disposed inside the drill pipe and a fixed plate fixedly disposed in the middle of the drill pipe. The fixed plate is fixedly connected to the inner wall of the drill pipe. A first bearing is fixedly disposed through the center of the fixed plate. The inner ring of the first bearing is fixedly sleeved on the driving tube. The lower end of the driving tube extends through into the drill bit. Each transmission mechanism includes a first bevel gear fixedly sleeved on the driving tube and second bevel gears symmetrically disposed on both sides of the first bevel gear. Both second bevel gears mesh with the first bevel gear. A screw is fixedly disposed on the central shaft of each second bevel gear. The insertion tube is disposed at the position corresponding to the screw. Each insertion tube is a hollow tube. The screw passes through the wall of the drill pipe and the arc-shaped water stop plate in sequence and extends into the corresponding insertion tube. The screw is threadedly connected to the arc-shaped water stop plate.

[0008] The preferred technical solution of the present invention is as follows: the edge of the cover plate is connected to the top of the drill pipe by multiple screws; when water stop is required, the cover plate is opened and a drive motor is connected to the upper end of the drive pipe.

[0009] The preferred technical solution of the present invention is that the arc-shaped waterstop plates are in even numbers and symmetrically distributed, and their curvature matches the curvature of the inner wall of the borehole.

[0010] A preferred technical solution of the present invention is as follows: the drill bit has a water storage tank and a water inlet channel inside, the lower end of the water inlet channel is connected to the top of the water storage tank, the upper end of the water inlet channel extends to the top of the drill bit, the lower end of the drive pipe passes through the drill bit and extends into the water storage tank, a connecting pipe is installed at the lower end of the drive pipe, the connecting pipe is connected to a flexible hose, a third bearing is sleeved on the lower part of the drive pipe, and the outer ring of the third bearing is fixedly connected to the top of the drill bit.

[0011] A preferred technical solution of the present invention is as follows: a second bearing is sleeved on the screw, and the outer ring of the second bearing is fixedly connected to the inner wall of the drill pipe.

[0012] A preferred technical solution of the present invention is that a rubber sleeve is fixedly fitted on the upper end of the drive tube.

[0013] This invention also provides a layered water-stopping method for hydrogeological drilling, wherein the water-stopping method uses the above-mentioned layered water-stopping device for hydrogeological drilling to perform layered water-stopping, and the specific steps are as follows:

[0014] S1. Connect the coupling to the power output end of the motor, and use the motor to drive the drill pipe and drill bit to rotate, so that the drill bit drills a hole from the ground downwards;

[0015] S2. During the drilling process, if water gushing out, open the cover plate and rotate the drive pipe to make the drive pipe drive the first bevel gear to rotate. The first bevel gear drives the two second bevel gears meshing with it to rotate simultaneously. The second bevel gears drive the screw to rotate. The screw drives the arc-shaped waterstop plate and the insertion pipe to move outward, thereby opening the telescopic cylindrical waterstop structure. The arc-shaped waterstop plate and arc-shaped waterstop strip fit against the hole wall, and the insertion pipe is inserted into the soil and fixed.

[0016] S3. Continue rotating the drive tube to disengage the screw from the insertion tube, causing the arc-shaped waterstop plate and arc-shaped waterstop strip to detach from the main body and adhere to the hole wall for water stop.

[0017] The preferred technical solution of the present invention is as follows: In step S2, when water surge occurs, the water enters the water storage tank through the water inlet channel. After removing the cover plate, the upper end of the drive pipe is first connected to the water pump through a hose to pump out the water in the water storage tank, and then the water in the hole is pumped out. After the water is drained, the drive motor is connected to the drive pipe, and the drive motor rotates the drive pipe to stop the water flow.

[0018] The beneficial effects of this invention are:

[0019] This invention drills a hole from the ground downwards using a drill bit. During the drilling process, water gushes out, and the drive pipe can be rotated to move the arc-shaped water-stop plate and arc-shaped water-stop strip outwards to fit against the hole wall and fix them at the position where water gushes out of the hole wall, thereby effectively stopping the water. In addition, the water gushes out during the drilling process enters the water storage tank of the drill bit through the water inlet channel, and can be pumped away and discharged through the drive pipe to prevent the hole from being blocked by water. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 for Figure 1 Enlarged schematic diagram of part A;

[0022] Figure 3 for Figure 1 Enlarged schematic diagram of part B;

[0023] Figure 4 for Figure 1 Enlarged schematic diagram of part C;

[0024] Figure 5 for Figure 1 Enlarged schematic diagram of part D;

[0025] Figure 6 Top view of the connection structure between the arc-shaped waterstop plate and the arc-shaped waterstop strip;

[0026] Reference numerals: 1. Coupling; 2. Cover plate; 3. Screw; 4. Drill pipe; 5. Rubber sleeve; 6. Drive pipe; 7. First bevel gear; 8. Second bevel gear; 9. Arc-shaped waterstop plate; 10. Screw; 11. Insert pipe; 12. Second bearing; 13. Fixed plate; 14. First bearing; 15. Third bearing; 16. Drill bit; 17. Water inlet channel; 18. Water storage tank; 19. Hose; 20. Connecting pipe; 22. Arc-shaped waterstop strip. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0028] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] Example 1 provides a layered water-stopping device for hydrogeological drilling, such as Figures 1 to 6As shown, the system includes a drill bit 16, with a drill tube 4 fixed to the top of the drill bit 16. The diameter of the drill tube 4 is smaller than that of the drill bit 16. Several arc-shaped waterstop plates 9 are arranged on the outside of the drill tube 4 in a circular array around the circumference of the drill tube 4. Adjacent arc-shaped waterstop plates 9 are fixed together by elastic arc-shaped waterstop strips 22. A driving device for pushing the arc-shaped waterstop plates 9 outward is provided inside the drill tube 4. The driving device is connected to the arc-shaped waterstop plates 9 through at least two sets of transmission mechanisms, driving the arc-shaped waterstop plates 9 outward and pressing them against the borehole wall. To facilitate the fixing of the arc-shaped waterstop plate 9 to the hole wall, an insertion tube 11 is provided on the outer wall of the arc-shaped waterstop plate 9. The end of the insertion tube 11 is set with a tapered tip for easy insertion into the hole wall. The total length of the two insertion tubes 11 and the diameter of the drill pipe 4 is less than or equal to the diameter of the largest part of the drill bit 16. When the arc-shaped waterstop plate 9 is close to the outer wall of the drill pipe 4, the horizontal extension length of the insertion tube 11 does not exceed the diameter of the largest part of the drill bit, and the insertion tube 11 will not affect the normal drilling of the drill bit. A cover plate 2 is provided on the top of the drill pipe 4. The edge of the cover plate 2 is connected to the top of the drill pipe 4 by multiple screws 3, and a coupling 1 is fixed on the top of the cover plate 2.

[0031] Example 1 provides a layered water-stopping device for hydrogeological drilling, such as Figures 1 to 6 As shown, the driving device includes a driving pipe 6 vertically disposed inside the drill pipe 4 and a fixed plate 13 fixedly disposed in the middle of the drill pipe 4. The fixed plate 13 is fixedly connected to the inner wall of the drill pipe 4. A first bearing 14 is fixedly disposed through the center of the fixed plate 13. The inner ring of the first bearing 14 is fixedly sleeved on the driving pipe 6. A rubber sleeve 5 is fixedly sleeved on the upper end of the driving pipe 6, and the lower end extends through into the drill bit 16. A water storage tank 18 is provided inside the drill bit 16. A water inlet channel 17 is provided above the water storage tank 18, leading to the outside of the drill bit 16. The lower end of the water inlet channel 17 communicates with the top of the water storage tank 18, and the upper end of the water inlet channel 17 extends to the top of the drill bit 16, enabling communication with the borehole. The lower end of the driving pipe 6 passes through the drill bit 16 and extends into the water storage tank 18. A connecting pipe 20 is installed at the lower end of the driving pipe 6. The connecting pipe 20 is connected to a hose 19. A third bearing 15 is sleeved on the lower part of the driving pipe 6, and the outer ring of the third bearing 15 is fixedly connected to the top of the drill bit 16. At least two sets of transmission mechanisms are distributed and installed on the drive tube 6, such as Figure 3 As shown, each transmission mechanism includes a first bevel gear 7 fixedly sleeved on the drive tube 6 and second bevel gears 8 symmetrically arranged on both sides of the first bevel gear 7. Both second bevel gears 8 mesh with the first bevel gear 7. A screw 10 is fixedly mounted on the central shaft of each second bevel gear 8. The insertion tube 11 is positioned at the corresponding screw 10, and each insertion tube 11 is a hollow tube. The screw 10 passes through the wall of the drill pipe 4 and the arc-shaped waterstop plate 9 in sequence, extending into the corresponding insertion tube 11, and the screw 10 is threadedly connected to the arc-shaped waterstop plate 9. A second bearing 12 is sleeved on the screw 10, and the outer ring of the second bearing 12 is fixedly connected to the inner wall of the drill pipe 4.

[0032] The driving device can drive the first bevel gear 7 of each transmission mechanism to rotate. The first bevel gear 7 simultaneously drives the second bevel gears 8 on both sides to rotate, thereby driving the screws 10 on both sides to rotate. Since the arc-shaped waterstop plate 9 is threadedly connected to the screw 10, when the screw 10 rotates, it will push the arc-shaped waterstop plate 9 to move outward, causing all the arc-shaped waterstop plates 9 to disengage from the screw 10. During the movement, the insertion tube 11 on the outer wall of the arc-shaped waterstop plate 9 will be inserted into the borehole wall, fixing the arc-shaped waterstop plate to the borehole wall. Since the adjacent arc-shaped waterstop plates 9 are connected by the arc-shaped waterstop strip 22, which is flexible, the waterstop strip can also retract when the arc-shaped waterstop plate 9 retracts. When the arc-shaped waterstop plate 9 moves outward, the arc-shaped waterstop strip 22 unfolds and forms a complete cylindrical waterstop structure with the arc-shaped waterstop plate 9, which is fixed to the borehole wall and plays a role in water stop.

[0033] The overall working process of this invention is as follows: Connect the coupling 1 to the power output end of the motor, and use the motor to drive the drill pipe 4 and the drill bit 16 to rotate, so that the drill bit 16 drills a hole from the ground downwards. If water flows into the hole during the drilling process, the water enters the water storage tank 18 through the water inlet channel 17. Remove the screw 3 and the cover plate 2, and connect the upper end of the drive pipe 6 to the water pump through the hose, so that the water in the water storage tank 18 can be pumped out, and then the water in the hole can be pumped out. After the water is drained, a drive motor is connected to the drive pipe 6. The drive motor rotates the drive pipe 6, causing the drive pipe 6 to drive the first bevel gear 7 to rotate. The first bevel gear 7 drives the second bevel gear 8 to rotate, and the second bevel gear 8 drives the screw 10 to rotate. The screw 10 drives the arc-shaped waterstop plate 9 and the insertion pipe 11 to move outward, thereby causing the arc-shaped waterstop plate 9 and the arc-shaped waterstop strip 22 to move outward and fit against the hole wall. The insertion pipe 11 is inserted into the soil to fix the position of the arc-shaped waterstop plate 9 and the arc-shaped waterstop strip 22. Finally, the screw 10 is separated from the insertion pipe 11, and the arc-shaped waterstop plate 9 and the arc-shaped waterstop strip 22 are separated from the main body and fit against the hole wall to stop the water.

[0034] Example 2 provides a layered water-stopping method for hydrogeological drilling. This method uses the layered water-stopping device described in Example 1 for layered water-stopping. The specific steps are as follows:

[0035] S1. Connect coupling 1 to the power output end of the motor, and use the motor to drive the drill pipe 4 and drill bit 16 to rotate, so that the drill bit drills a hole from the ground downwards;

[0036] S2. During the drilling process, if water gushes out, the water enters the water storage tank 18 through the water inlet channel 17. Open the cover plate 2, first connect the upper end of the drive pipe 6 to the water pump through the hose, and pump out the water in the water storage tank 18, and then pump out the water in the hole. After the water is drained, connect the drive motor to the drive pipe 6. The drive motor rotates the drive pipe 6, which drives the first bevel gear 7 to rotate. The first bevel gear 7 drives the two second bevel gears 8 meshing with it to rotate simultaneously. The second bevel gears 8 drive the screw 10 to rotate. The screw 10 drives the arc-shaped waterstop plate 9 and the insertion tube 11 to move outward, thereby opening the telescopic cylindrical waterstop structure. The arc-shaped waterstop plate 9 and the arc-shaped waterstop strip 22 fit against the hole wall, and the insertion tube 11 is inserted into the soil and fixed.

[0037] S3. Continue to rotate the drive tube 6 to disengage the screw 10 from the insertion tube 11, and the arc-shaped waterstop plate 9 and arc-shaped waterstop strip 22 disengage from the main body and adhere to the hole wall to stop water.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A layered water-stopping device for hydrogeological drilling, characterized in that: The system includes a drill bit (16) and a drill pipe (4), with the diameter of the drill pipe (4) being smaller than that of the drill bit (16). A cover plate (2) is provided on the top of the drill pipe (4), and a coupling (1) is fixedly provided on the top of the cover plate (2). Multiple arc-shaped water-stop plates (9) are provided on the outside of the drill pipe (4). The multiple arc-shaped water-stop plates (9) are arranged in a circular array around the circumference of the drill pipe (4). Adjacent arc-shaped water-stop plates (9) are fixedly connected by an elastic arc-shaped water-stop strip (22) to form a telescopic cylindrical water-stop structure sleeved on the outer wall of the drill pipe (4). Multiple insertion tubes (11) are distributed on the outer wall, and the total length of two insertion tubes (11) and the diameter of the drill pipe (4) is less than or equal to the diameter of the largest part of the drill bit (16); the drill pipe (4) is provided with a driving device for pushing the arc-shaped waterstop plate (9) to move outward. The driving device is connected to the arc-shaped waterstop plate (9) through at least two sets of transmission mechanisms, and drives the telescopic cylindrical waterstop structure composed of multiple arc-shaped waterstop plates (9) and arc-shaped waterstop strips (22) to extend and closely adhere to the borehole wall through the transmission mechanism, and is fixed to the borehole wall by the insertion tubes (11) for water stop; The drive device includes a drive tube (6) vertically disposed inside the drill pipe (4) and a fixed plate (13) fixedly disposed in the middle of the drill pipe (4). The fixed plate (13) is fixedly connected to the inner wall of the drill pipe (4). A first bearing (14) is fixedly disposed through the center of the fixed plate (13). The inner ring of the first bearing (14) is fixedly sleeved on the drive tube (6). The lower end of the drive tube (6) extends through into the drill bit (16). Each transmission mechanism includes a first bevel gear (7) fixedly sleeved on the drive tube (6) and a symmetrically arranged first bevel gear (7). The first bevel gear (7) has two second bevel gears (8) on both sides. Both second bevel gears (8) mesh with the first bevel gear (7). A screw (10) is fixed on the central shaft of each second bevel gear (8). The insertion tube (11) is set at the position of the corresponding screw (10). Each insertion tube (11) is a hollow tube. The screw (10) passes through the wall of the drill pipe (4) and the arc-shaped water stop plate (9) in sequence and extends into the corresponding insertion tube (11). The screw (10) is threadedly connected to the arc-shaped water stop plate (9). The drill bit (16) has a water storage tank (18) and a water inlet channel (17) inside. The lower end of the water inlet channel (17) is connected to the top of the water storage tank (18), and the upper end of the water inlet channel (17) extends to the top of the drill bit (16). The lower end of the drive pipe (6) passes through the drill bit (16) and extends into the water storage tank (18). A connecting pipe (20) is installed at the lower end of the drive pipe (6). The connecting pipe (20) is connected to the hose (19). A third bearing (15) is sleeved on the lower part of the drive pipe (6). The outer ring of the third bearing (15) is fixed to the top of the drill bit (16).

2. The hydrogeological drilling layered water-stopping device according to claim 1, characterized in that: The edge of the cover plate (2) is connected to the top of the drill pipe (4) by multiple screws (3); when water stop is required, the cover plate (2) is opened and a drive motor is connected to the upper end of the drive pipe (6).

3. The hydrogeological drilling layered water-stopping device according to claim 1, characterized in that: The arc-shaped waterstop (9) is an even number, symmetrically distributed, and its curvature matches the curvature of the inner wall of the borehole.

4. The hydrogeological drilling layered water-stopping device according to claim 1, characterized in that: The screw (10) is fitted with a second bearing (12), and the outer ring of the second bearing (12) is fixedly connected to the inner wall of the drill pipe (4).

5. A layered water-stopping device for hydrogeological drilling according to claim 1, characterized in that: A rubber sleeve (5) is fixedly fitted on the upper end of the drive tube (6).

6. A layered water-stopping method for hydrogeological drilling, characterized in that: The water-stopping method uses the hydrogeological drilling layered water-stopping device according to any one of claims 1 to 5 to perform layered water-stopping, and the specific steps are as follows: S1. Connect the coupling to the power output end of the motor, and use the motor to drive the drill pipe and drill bit to rotate, so that the drill bit drills a hole from the ground downwards; S2. During the drilling process, if water gushing out, open the cover plate and rotate the drive pipe to make the drive pipe drive the first bevel gear to rotate. The first bevel gear drives the two second bevel gears meshing with it to rotate simultaneously. The second bevel gears drive the screw to rotate. The screw drives the arc-shaped waterstop plate and the insertion pipe to move outward, thereby opening the telescopic cylindrical waterstop structure. The arc-shaped waterstop plate and arc-shaped waterstop strip fit against the hole wall, and the insertion pipe is inserted into the soil and fixed. S3. Continue rotating the drive tube to disengage the screw from the insertion tube, causing the arc-shaped waterstop plate and arc-shaped waterstop strip to detach from the main body and adhere to the hole wall for water stop.

7. A layered water-stopping method for hydrogeological drilling according to claim 6, characterized in that: In step S2, when water surges, the water enters the water storage tank through the water inlet channel. After removing the cover plate, the upper end of the drive pipe is first connected to the water pump through a hose to pump out the water in the water storage tank, and then the water in the hole is pumped out. After the water is drained, the drive motor is connected to the drive pipe, and the drive motor rotates the drive pipe to stop the water flow.

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