Coal seam gas drill hole sealing device

Abstract

The utility model provides a coal seam gas drilling and sealing device, which belongs to the technical field of mining equipment, and comprises a gas collecting pipe, a sealing mechanism is arranged on the gas collecting pipe, and the sealing mechanism comprises a contact chuck, a sealing colloid and fixing clamps on two sides. One end of the contact chuck makes contact with the inner wall of a drill hole through the plugging colloid to be used for plugging, the fixing clamp comprises an adjusting end and a fixing clamp rod, the top end of the fixing clamp rod is movably connected with the contact chuck, the adjusting end comprises an adjusting screw shaft and a movable rod, the top end of the movable rod is adjustably connected with the adjusting screw shaft, and the adjusting screw shaft is movably connected with the fixing clamp rod. The bottom end of the movable rod makes contact with the fixed clamping rod and is used for driving the fixed clamping rod to be attached to the inner wall of the rotating hole for fixing. One end of the adjusting screw shaft is rotationally connected with the contact chuck through a connecting shaft seat; according to the utility model, the problem of low concentration of extracted gas caused by insufficient sealing performance at the drilling hole during gas extraction can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mining equipment, and in particular relates to a coal seam gas drilling and sealing device. Background Art

[0002] The vast majority of my country's coal seams are characterized by low permeability. This characteristic presents significant challenges for coal seam gas extraction. Currently, due to issues such as gas leakage during drilling and sealing, the gas concentration extracted from most low-permeability coal seam mines in my country is too low. This low concentration of gas is difficult to effectively utilize, and even if it is, the cost is prohibitive. Consequently, most extracted gas in mining areas is directly released into the air, a phenomenon known as "venting."

[0003] This situation has numerous negative consequences. First, it represents a significant waste of precious resources. Gas, as a potentially valuable energy source, could be harnessed through appropriate technological means, such as for power generation or as residential fuel. However, due to its low extraction concentration, its full potential cannot be realized. Second, direct gas emissions pollute the atmosphere, exacerbating environmental problems.

[0004] Theoretically, if the borehole were completely leak-proof, the extracted gas concentration should be close to 100%. However, the reality is that the extracted gas concentration in many coal seams in my country is only around 15%, resulting in low concentrations due to insufficient sealing during extraction. Utility Model Content

[0005] In view of this, the utility model provides a coal seam gas drilling and sealing device, which can solve the problem of low extracted gas concentration caused by insufficient sealing at the drill hole when extracting gas.

[0006] The utility model is achieved in this way:

[0007] The utility model provides a coal seam gas drilling and sealing device, which includes a gas collection pipe, and a sealing mechanism is provided on the gas collection pipe. The sealing mechanism includes a contact chuck, a sealing colloid and fixed clamps on both sides. One end of the contact chuck contacts the inner wall of the borehole through the sealing colloid for sealing. The fixed clamp includes an adjusting end and a fixed clamping rod. The top end of the fixed clamping rod is movably connected to the contact chuck. The adjusting end includes an adjusting screw and a movable rod. The top end of the movable rod is adjustably connected to the adjusting screw, and the bottom end of the movable rod contacts the fixed clamping rod to drive the fixed clamping rod to fit the inner wall of the borehole for fixing.

[0008] The technical effects of a coal seam gas drilling and sealing device provided by the utility model are as follows: a gas collection tube is used as a channel for gas extraction and collection, and a sealing mechanism is provided so that a sealing colloid at one end is in direct contact with the inner wall of the borehole, thereby playing a sealing role and preventing gas from leaking from the connection between the borehole and the device, and the device and the inner wall of the borehole are fixed in conjunction with a contact chuck and a fixing clamp, thereby further ensuring the sealing effect, and thereby improving the concentration of gas collected through the gas collection tube while ensuring the sealing effect.

[0009] On the basis of the above technical solution, the coal seam gas drilling and sealing device of the present invention can also be improved as follows:

[0010] Wherein, one end of the adjusting screw shaft is rotatably connected to the contact chuck through a coupling seat.

[0011] The beneficial effect of adopting this improved solution is that by rotating the adjustment screw, the movement of the adjustment rod can be controlled, thereby adjusting the position of the fixed clamp rod so that it fits tightly against the inner wall of the drill hole, achieving a secure fixation of the device. The threaded design makes adjustment more precise and stable.

[0012] Furthermore, the other end of the adjusting screw is fixedly connected to an adjusting knob.

[0013] Furthermore, a movable cavity for the movable rod to move is provided inside the contact chuck.

[0014] Furthermore, the adjusting screw shaft is provided with a thread.

[0015] Furthermore, a through hole is provided at the top end of the movable rod, and a threaded structure adapted to the adjusting screw shaft is provided on the inner wall of the through hole.

[0016] Furthermore, the movable rod is connected to the adjusting screw shaft through the through hole.

[0017] Furthermore, a guide shaft is provided inside the movable cavity.

[0018] Furthermore, a second through hole is provided at a position of the movable rod corresponding to the guide shaft, and the guide shaft passes through the second through hole for limiting the adjustment of the movable rod.

[0019] Furthermore, the blocking colloid is adhered and fixed to the contact chuck via a glue layer, the outer diameter of the blocking colloid is larger than the inner diameter, and a stepped groove is provided on the outer wall of the blocking colloid.

[0020] Compared with existing technologies, the coalbed gas drilling and sealing device provided by this utility model has the following beneficial effects: The gas collection tube serves as a channel for gas extraction and collection. A sealing mechanism is provided, allowing the sealing colloid at one end to directly contact the inner wall of the borehole, thereby blocking gas leakage from the connection between the borehole and the device. A contact chuck and a fixed clamp secure the device to the inner wall of the borehole, further ensuring a sealing effect. While maintaining a sealing effect, this also increases the concentration of gas collected through the gas collection tube. Rotating the adjustment screw controls the movement of the adjustable lever, thereby adjusting the position of the fixed clamp rod to closely contact the inner wall of the borehole, achieving a secure fixation of the device. The threaded design allows for more precise and stable adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 This is a structural diagram of a coal seam gas drilling and sealing device;

[0023] Figure 2 for Figure 1 A magnified schematic diagram of part A;

[0024] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0025] 10. Gas collection tube; 11. Sealing mechanism; 12. Contact chuck; 13. Sealing colloid; 14. Fixed clamp; 15. Adjustment end; 16. Fixed clamp rod; 17. Adjustment screw; 18. Movable rod; 19. Guide shaft. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0027] like Figure 12 is an embodiment of a coal seam gas drilling and sealing device provided by the utility model. In this embodiment, it includes a gas collection pipe 10, and a sealing mechanism 11 is provided on the gas collection pipe 10. The sealing mechanism 11 includes a contact chuck 12, a sealing colloid 13 and fixed clamps 14 on both sides. One end of the contact chuck 12 contacts the inner wall of the borehole through the sealing colloid 13 for sealing. The fixed clamp 14 includes an adjusting end 15 and a fixed clamping rod 16. The top end of the fixed clamping rod 16 is movably connected to the contact chuck 12. The adjusting end 15 includes an adjusting screw shaft 17 and a movable rod 18. The top end of the movable rod 18 is adjustably connected to the adjusting screw shaft 17, and the bottom end of the movable rod 18 contacts the fixed clamping rod 16 to drive the fixed clamping rod 16 to fit the inner wall of the borehole for fixing.

[0028] During use, the gas collection tube 10 is first inserted into the borehole. Then, the adjustment knob is turned to rotate the adjustment screw 17. Because the adjustment screw 17 is threaded, and the inner wall of the through-hole at the top of the movable rod 18 also has a matching threaded structure, rotation of the adjustment screw 17 causes the movable rod 18 to move along the adjustment screw 17 under the action of the threads. During movement, the bottom end of the movable rod 18 contacts the fixed clamping rod 16, driving the fixed clamping rod 16 to move, gradually conforming to the inner wall of the borehole. Simultaneously, as the movable rod 18 moves within the movable cavity within the contact chuck, a guide shaft 19 within the movable cavity extends through the second through-hole on the movable rod 18, limiting and guiding the adjustment of the movable rod 18 and ensuring the correct direction of movement. Once the fixed clamping rod 16 is firmly attached to the inner wall of the borehole, the sealing colloid at one end of the contact chuck 12 also tightly contacts the inner wall of the borehole, achieving a seal. The outer diameter of the plugging colloid 13 is larger than the inner diameter, and the stepped groove design on the outer wall enhances adhesion to the inner wall of the borehole and the sealing effect. It can effectively seal coal seam gas boreholes, ensure the accuracy and safety of gas collection, and improve the collected concentration.

[0029] Among them, in the above technical solution, one end of the adjusting screw shaft 17 is rotatably connected to the contact chuck 12 through the coupling seat.

[0030] Furthermore, in the above technical solution, the other end of the adjusting screw shaft 17 is fixedly connected to an adjusting knob.

[0031] Furthermore, in the above technical solution, a movable cavity for the movable rod 18 to move is provided inside the contact chuck 12 .

[0032] Furthermore, in the above technical solution, a thread is provided on the adjusting screw shaft 17 .

[0033] Furthermore, in the above technical solution, a through hole is provided at the top end of the movable rod 18 , and a threaded structure adapted to the adjusting screw shaft 17 is provided on the inner wall of the through hole.

[0034] Furthermore, in the above technical solution, the movable rod 18 is connected to the adjusting screw shaft 17 through a through hole.

[0035] Furthermore, in the above technical solution, a guide shaft 19 is provided inside the active cavity.

[0036] Furthermore, in the above technical solution, a second through hole is opened at the position of the movable rod 18 corresponding to the guide shaft 19 , and the guide shaft 19 passes through the second through hole to limit the adjustment of the movable rod 18 .

[0037] Furthermore, in the above technical solution, the blocking colloid 13 is adhered and fixed to the contact chuck 12 by an adhesive layer, the outer diameter of the blocking colloid 13 is larger than the inner diameter, and a stepped groove is provided on the outer wall of the blocking colloid 13 .

[0038] Specifically, the principle of the present invention is as follows: To use, first insert the gas collection tube 10 into the borehole. Then, rotate the adjustment knob to rotate the adjustment screw 17. Because the adjustment screw 17 is threaded, and the inner wall of the through-hole at the top of the movable rod 18 also has a matching threaded structure, rotation of the adjustment screw 17 causes the movable rod 18 to move along the adjustment screw 17. During this movement, the bottom end of the movable rod 18 contacts the fixed clamping rod 16, driving the fixed clamping rod 16 to move, gradually conforming to the inner wall of the borehole. Simultaneously, as the movable rod 18 moves within the movable cavity within the contact chuck, a guide shaft 19 within the cavity, extending through the second through-hole in the movable rod 18, limits and guides the adjustment of the movable rod 18, ensuring accurate movement. Once the fixed clamping rod 16 is securely attached to the inner wall of the borehole, the sealing colloid at one end of the contact chuck 12 also comes into close contact with the inner wall of the borehole, effectively sealing it. The outer diameter of the plugging colloid 13 is larger than the inner diameter, and the stepped groove design on the outer wall enhances adhesion to the inner wall of the borehole and the sealing effect. It can effectively seal coal seam gas boreholes, ensure the accuracy and safety of gas collection, and improve the collected concentration.

Claims

1. A coal seam gas drilling and sealing device, characterized in that: The invention comprises a gas collection pipe (10), wherein the gas collection pipe (10) is provided with a sealing mechanism (11), wherein the sealing mechanism (11) comprises a contact chuck (12), a sealing colloid (13) and fixed clamps (14) on both sides, wherein one end of the contact chuck (12) contacts the inner wall of the borehole through the sealing colloid (13) for sealing, and the fixed clamp (14) comprises an adjusting end (15) and a fixed clamping rod (16), wherein the top end of the fixed clamping rod (16) is movably connected to the contact chuck (12), and the adjusting end (15) comprises an adjusting screw shaft (17) and a movable rod (18), wherein the top end of the movable rod (18) is adjustably connected to the adjusting screw shaft (17), and the bottom end of the movable rod (18) contacts the fixed clamping rod (16) for driving the fixed clamping rod (16) to fit the inner wall of the borehole for fixing.

2. A coal seam gas drilling and sealing device according to claim 1, characterized in that: One end of the adjusting screw shaft (17) is rotatably connected to the contact chuck (12) via a coupling seat.

3. A coal seam gas drilling and sealing device according to claim 2, characterized in that: The other end of the adjusting screw shaft (17) is fixedly connected with an adjusting knob.

4. A coal seam gas drilling and sealing device according to claim 3, characterized in that: A movable cavity for the movable rod (18) to move is provided inside the contact chuck (12).

5. A coal seam gas drilling and sealing device according to claim 4, characterized in that: The adjusting screw shaft (17) is provided with a thread.

6. A coal seam gas drilling and sealing device according to claim 5, characterized in that: A through hole is provided at the top end of the movable rod (18), and a threaded structure adapted to the adjusting screw shaft (17) is provided on the inner wall of the through hole.

7. A coal seam gas drilling and sealing device according to claim 6, characterized in that: The movable rod (18) is connected to the adjusting screw shaft (17) through the through hole.

8. A coal seam gas drilling and sealing device according to claim 7, characterized in that: A guide shaft (19) is provided inside the movable cavity.

9. A coal seam gas drilling and sealing device according to claim 8, characterized in that: The movable rod (18) is provided with a second through hole at a position corresponding to the guide shaft (19), and the guide shaft (19) passes through the second through hole, so as to limit the adjustment of the movable rod (18).

10. A coal seam gas drilling and sealing device according to claim 9, characterized in that: The blocking colloid (13) is adhered and fixed to the contact chuck (12) via a glue layer. The outer diameter of the blocking colloid (13) is larger than the inner diameter, and a stepped groove is provided on the outer wall of the blocking colloid (13).

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