A blowout prevention drainage device for a floor hydrological hole

Abstract

This utility model relates to the field of gas blowout prevention technology, and more particularly to a blowout prevention and drainage device for a bottom plate hydrological borehole. It includes a drill rod, a core tube sleeved on the outside of the drill rod, and a blowout prevention cap sleeved on the drill rod. A high-pressure valve A is installed between the blowout prevention cap and the core tube. A pneumatically driven capsule is installed inside the blowout prevention cap. A blowout drainage hood is sealed to the front end of the blowout prevention cap. A slag-water separator is connected to the lower opening of the blowout prevention cap via a slag discharge hose. A high-pressure valve B is installed on the blowout prevention cap. A slag discharge pneumatic butterfly valve is installed at the slag discharge port of the slag-water separator. Valves A and B are located at the top of the slag-water separator. Valve A is connected to the blowout drainage hood via a drainage hose, and valve B is connected to the drainage pipeline via a drainage hose. This utility model can extract abnormally surging gas, carbon monoxide, and other toxic and harmful gases into the drainage pipeline, effectively preventing gas exceedance warning accidents caused by gas entering the environment, and greatly improving the safety factor of drilling operations.

Description

Technical Field

[0001] This utility model relates to the field of gas blowout prevention technology, and more specifically, to a blowout prevention and extraction device for hydrological holes in a base plate. Background Technology

[0002] Currently, there are certain technical problems when using the ZYWL-13000DSY(B) directional drilling rig to construct advanced exploration holes for the bottom plate in coal mines. During the drilling process, when encountering coal seams or fracture zones, gas will cause water in the hole to gush out instantaneously. After a large amount of gas pushes the borehole water into the drainage system, it will cause insufficient negative pressure in the drainage system, which may lead to a gas over-limit accident.

[0003] Previously, emergency response procedures for abnormal gas outbursts were cumbersome, requiring on-site personnel to work together. The specific steps were: when abnormal gas outbursts occurred, drilling was immediately stopped, the wear-resistant sleeve was tightened, the slag discharge butterfly valve was closed, the extraction valve was fully opened, the borehole was sealed with wet yellow mud, the extraction rate was increased by connecting the extraction pipe to the drill rod tail, and the gas in the drilling area was dispersed using ventilation pipes. This placed high demands on the comprehensive handling capabilities of on-site personnel. Even a slight delay in reaction could lead to a gas exceedance accident. Therefore, there is an urgent need for a simple, convenient, and efficient blowout prevention and extraction device for bottom hydrological boreholes to solve these problems. Utility Model Content

[0004] (a) Purpose of the utility model

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a blowout prevention and extraction device for bottom plate hydrological boreholes. This device solves the problems of cumbersome emergency response procedures, low efficiency, and easy occurrence of gas over-limit accidents in the existing technology. The device can extract toxic and harmful gases such as gas and carbon monoxide that abnormally emerge from the borehole during the construction of bottom plate hydrological boreholes into the extraction pipeline, effectively preventing gas over-limit warning accidents caused by gas entering the environment, and greatly improving the safety factor of drilling operations.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A blowout prevention and drainage device for a bottom plate hydrological borehole includes a drill rod, a core tube sleeved on the outside of the drill rod, a blowout prevention cap sleeved on the drill rod, a high-pressure valve A installed between the blowout prevention cap and the core tube, a pneumatically driven pneumatic capsule inside the blowout prevention cap, and a blowout drainage cover sealed to the front end of the blowout prevention cap.

[0009] It also includes a slag-water separator and a gas-water separator. The slag-water separator is connected to the lower opening of the blowout preventer cover via a slag discharge hose. The blowout preventer cover is equipped with a high-pressure valve B. The slag discharge port of the slag-water separator is equipped with a slag discharge pneumatic butterfly valve. The top of the slag-water separator is equipped with valves A and B. Valve A is connected to the blowout preventer venting cover via an extraction hose. Valve B is connected to the venting pipeline via an extraction hose, and a pneumatic regulating valve A is installed on the extraction hose. A gas-water separator is located on the right side of the slag-water separator. The top of the gas-water separator is equipped with valves C, D, and F. Valve C and D are connected to the upper opening of the blowout preventer cover via extraction hoses. Valve F is connected to the venting pipeline via an extraction hose, and a pneumatic regulating valve C is installed on the extraction hose.

[0010] Furthermore, a gas monitor is installed inside the blowout preventer.

[0011] Furthermore, the top of the gas-water separator is also equipped with a valve E, and a return air corner extractor is connected to the valve E through an extraction hose, and a pneumatic regulating valve B is installed on the extraction hose.

[0012] Furthermore, a drain pipe is connected to the right side of the gas-water separator, and the outer end of the drain pipe is connected to an automatic water dispenser.

[0013] Furthermore, it also includes a two-position four-way valve, which is connected to each pneumatic component via an air pipe.

[0014] (III) Working Principle

[0015] When encountering a coal seam or fracture zone during drilling, and gas causes water to gush out of the borehole, the drilling rig operator activates the blowout prevention and drainage device by operating a two-position four-way valve. At this time, the two-position four-way valve controls the 0.5MPa air pressure of the downhole production air supply pipeline to enter various components: the pneumatic bladder rapidly expands, filling the space inside the blowout preventer and tightly gripping the drill pipe to prevent gas from escaping from the orifice; the slag discharge pneumatic butterfly valve immediately closes, cutting off the slag discharge channel and preventing gas from gushing out from the slag discharge port; pneumatic regulating valves A, B, and C are simultaneously fully opened, and the extraction hose begins to extract gas. The blowout preventer extracts any residual gas that may leak from the orifice into the extraction hose, and the return air corner extractor at the return air corner extracts the gas in the return air flow into the extraction hose; during the extraction process, the gas, water, and slag mixture in the pipeline enters the gas-water separator and the slag-water separator. The slag and water are separated by the slag-water separator, and the gas and water are separated by the gas-water separator. The separated water is automatically discharged through the automatic water drainer, ensuring that the extraction pipeline remains unobstructed and the extraction effect is not affected.

[0016] (iv) Beneficial effects

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This utility model forms multiple prevention and control measures by setting up a blowout prevention and extraction cover and a return air corner extraction device. It can extract the gas that surges out of the hole during the construction of the hydrological hole in the bottom plate into the extraction pipeline, effectively preventing the gas from entering the environment and causing gas over-limit warning accidents, and greatly improving the safety drilling coefficient.

[0019] 2. This utility model is simple to operate. When gas erupts, only the two-position four-way valve needs to be operated and controlled, which can replace the previous cumbersome emergency response procedures. Combining the characteristics of the gas eruption hole in the hydrological well, the 0.5MPa air pressure of the underground production air supply pipeline is connected to the two-position four-way valve to control the closure of multiple pneumatic capsules and the opening of pneumatic valves, so as to synchronously control the entire blowout prevention and extraction device, thereby achieving the effect of rapid response.

[0020] 3. This utility model has multi-level prevention and control measures. It utilizes a built-in gas monitor, slag-water separator, gas-water separator, automatic water drainer, and return air corner extractor to effectively prevent gas accidents. The device has a simple structure and is easy to maintain and operate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the structure of this utility model from another angle.

[0023] Figure 3 This is a partial structural schematic diagram of the present invention.

[0024] Figure 4 This is a schematic diagram of the slag-water separator of this utility model.

[0025] Figure 5 This is a schematic diagram of the gas-water separator of this utility model.

[0026] In the diagram: 1. Drill pipe; 2. Slag-water separator; 3. Gas-water separator; 4. Two-position four-way valve; 5. Return air corner extractor; 6. Gas pipe; 7. Extraction pipeline; 8. Extraction hose; 9. Blowout preventer extraction cover; 10. Blowout preventer gland; 11. High-pressure valve A; 12. Core tube; 13. Pneumatic regulating valve A; 14. Valve A; 15. Valve B; 16. Slag discharge pneumatic butterfly valve; 17. Valve C; 18. Valve D; 19. Automatic water drainer; 20. Drain pipe; 21. Valve E; 22. Valve F; 23. Pneumatic regulating valve B; 24. Pneumatic regulating valve C; 25. High-pressure valve B; 26. Slag discharge hose. Detailed Implementation

[0027] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0028] Example:

[0029] like Figures 1 to 5 As shown, a blowout prevention and drainage device for a bottom plate hydrological borehole includes a drill rod 1, with a core tube 12 sleeved on the outside of the drill rod 1. The drill rod 1 is responsible for transmitting power, and the core tube 12 is used to collect rock cores and guide drill cuttings out. The two form the initial channel for the fluid-solid mixture. A blowout preventer cap 10 is also sleeved on the drill rod 1. The blowout preventer cap 10 and the core tube 12 form a sealed cavity, which is the first line of defense against abnormal outflow. Its front end is sealed to the blowout prevention and drainage cover 9, and its rear end is connected to the core tube 12 through a high-pressure valve A11 to achieve pressure control and fluid guidance. A high-pressure valve A11 is installed between the blowout preventer 10 and the core tube 12. The blowout preventer 10 is equipped with a pneumatically driven pneumatic capsule, which expands or contracts pneumatically. Under abnormal working conditions, the capsule expands to fill the gap between the blowout preventer 10 and the drill pipe 1, forming a seal. The front end of the blowout preventer 10 is sealed with a blowout release hood 9. The blowout release hood 9 is placed at the front end of the blowout preventer 10 to form a secondary seal, which can collect the gas overflowing from the blowout preventer 10 and work together with the blowout preventer 10 to achieve a dual blowout prevention effect.

[0030] It also includes a slag-water separator 2 and a gas-water separator 3. The slag-water separator 2 is connected to the lower opening of the blowout preventer 10 through a slag discharge hose 26. The blowout preventer 10 is equipped with a high-pressure valve B25. The slag discharge port of the slag-water separator 2 is equipped with a slag discharge pneumatic butterfly valve 16. The slag-water separator 2 is connected to the lower opening of the blowout preventer 10 through a slag discharge hose 26. After receiving the mixture, it achieves solid-liquid separation. The separated drill cuttings are discharged under the control of the slag discharge pneumatic butterfly valve 16, and the liquid enters the subsequent processing flow. The top of the slag-water separator 2 is equipped with valves A14 and B15. Valve A14 is connected to the blowout preventer hood 9 via a suction hose 8, and valve B15 is connected to the drainage pipeline 7 via a suction hose 8. A pneumatic regulating valve A13 is installed on the suction hose 8. A gas-water separator 3 is located on the right side of the slag-water separator 2 to receive the liquid ejected from the blowout preventer hood 10 and further separate the gas and liquid. The top of the gas-water separator 3 is equipped with valves C17, D18, and F22. Valves C17 and D18 are connected to the upper opening of the blowout preventer hood 10 via a suction hose 8, and valve F22 is connected to the drainage pipeline 7 via a suction hose 8. A pneumatic regulating valve C24 is installed on the suction hose 8. This design solves the problems of cumbersome emergency response procedures, low efficiency, and easy occurrence of gas over-limit accidents in the existing technology for abnormal outbursts.

[0031] In this embodiment, a gas monitor is installed inside the blowout preventer hood 9. The gas monitor can monitor the gas concentration inside the blowout preventer hood 9 in real time, thereby determining whether a gas leak has occurred and triggering an emergency response.

[0032] In this embodiment, the top of the gas-water separator 3 is also equipped with a valve E21. A return air corner extractor 5 is connected to the valve E21 via an extraction hose 8, and a pneumatic regulating valve B23 is mounted on the extraction hose 8. This design, through the valve, the return air corner extractor 5, and the pneumatic regulating valve B23, constitutes a return air corner extraction system, which can extract and treat the gas accumulated at the return air corner of the working face, providing multiple layers of protection against gas leaks and effectively improving emergency response efficiency.

[0033] In this embodiment, a drain pipe 20 is connected to the right side of the gas-water separator 3. The outer end of the drain pipe 20 is connected to an automatic water drainer 19. The automatic water drainer 19 can automatically discharge the separated water to avoid water accumulation affecting the separation efficiency.

[0034] In this embodiment, a two-position four-way valve 4 is also included, which is connected to each pneumatic component via an air pipe 6. By controlling the closure of multiple pneumatic components through the two-position four-way valve 4, the entire blowout prevention and extraction device can be synchronously controlled, enabling one-button emergency operation, rapid switching of the air path under abnormal conditions, significantly shortening the response time, and thus achieving rapid response.

[0035] It should be noted that the two-position four-way valve 4 is pneumatically controlled by utilizing the 0.5MPa air pressure of the underground production air supply pipeline.

[0036] In addition, the principle of the pneumatic capsule is that air is injected into the pneumatic capsule through the air pipe 6. After the pneumatic capsule is inflated, it expands and fills the space inside the blowout cover 10 and holds the drill rod 1 tightly, sealing the gap between the drill rod 1 and the blowout cover 10 to prevent gas from overflowing from the orifice.

[0037] The working principle of this type of bottom plate hydrological hole anti-blowout extraction device:

[0038] When encountering a coal seam or fracture zone during drilling, and gas causes water to gush out of the borehole, the drilling rig operator activates the blowout prevention and drainage device by operating the two-position four-way valve 4.

[0039] At this time, the two-position four-way valve 4 controls the downhole production air supply pipeline at 0.5 MPa. Air pressure enters each component: the pneumatic capsule rapidly expands, filling the space inside the blowout preventer 10 and tightly gripping the drill rod 1, preventing gas from overflowing from the orifice; the slag discharge pneumatic butterfly valve 16 immediately closes, cutting off the slag discharge channel and preventing gas from gushing out of the slag outlet; pneumatic regulating valves A13, B23, and C24 simultaneously open completely, and the extraction hose 8 begins to extract gas; the blowout preventer hood 9 draws any residual gas that may leak from the orifice into the extraction hose 8; the return air corner extractor 5 at the return air corner draws the gas in the return airflow into the extraction hose 8; during the extraction process, the gas, water, and slag mixture in the pipeline enters the gas-water separator 3 and the slag-water separator 2, where the slag and water are separated by the slag-water separator 2, and the gas and water are separated by the gas-water separator 3. The separated water is automatically discharged through the automatic water drainer 19, ensuring that the extraction pipeline remains unobstructed and the extraction effect is not affected.

[0040] Through the above process, abnormally surging gas can be quickly and effectively pumped into the extraction pipeline, preventing gas from entering the environment and causing accidents exceeding limits, thus ensuring the safe conduct of drilling operations.

[0041] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A bottom plate hydrological borehole anti-blowout drainage device, comprising a drill rod (1), wherein a core tube (12) is sleeved on the outer side of the drill rod (1), characterized in that: The drill pipe (1) is also fitted with a blowout preventer cap (10), and a high-pressure valve A (11) is installed between the blowout preventer cap (10) and the core tube (12). The blowout preventer cap (10) is equipped with a pneumatically driven pneumatic capsule inside, and a blowout extraction cover (9) is sealed to the front end of the blowout preventer cap (10). It also includes a slag-water separator (2) and a gas-water separator (3). The slag-water separator (2) is connected to the lower opening of the blowout preventer (10) via a slag discharge hose (26). The blowout preventer (10) is equipped with a high-pressure valve B (25). The slag discharge outlet of the slag-water separator (2) is equipped with a pneumatic butterfly valve (16). The top of the slag-water separator (2) is equipped with valve A (14) and valve B (15). Valve A (14) is connected to the blowout preventer (9) via a extraction hose (8). Valve B (15) is connected to the blowout preventer via the extraction hose (8). In the extraction pipeline (7), and the extraction hose (8) is equipped with a pneumatic regulating valve A (13), the right side of the slag-water separator (2) is provided with a gas-water separator (3), the top of the gas-water separator (3) is provided with valve C (17), valve D (18) and valve F (22), the valve C (17) and valve D (18) are connected to the upper opening on the blowout preventer (10) through the extraction hose (8), the valve F (22) is connected to the extraction pipeline (7) through the extraction hose (8), and the extraction hose (8) is equipped with a pneumatic regulating valve C (24).

2. The bottom plate hydrological hole anti-blowout extraction device according to claim 1, characterized in that: The blowout preventer (9) is equipped with a gas monitor inside.

3. The bottom plate hydrological hole anti-blowout extraction device according to claim 1, characterized in that: The gas-water separator (3) is also equipped with a valve E (21) at the top. A return air corner extractor (5) is connected to the valve E (21) via an extraction hose (8), and a pneumatic regulating valve B (23) is installed on the extraction hose (8).

4. The bottom plate hydrological hole anti-blowout extraction device according to claim 1, characterized in that: The gas-water separator (3) is connected to a drain pipe (20) on the right side, and the outer end of the drain pipe (20) is connected to an automatic water dispenser (19).

5. The bottom plate hydrological hole anti-blowout extraction device according to claim 1, characterized in that: It also includes a two-position four-way valve (4), which is connected to each pneumatic component via an air pipe (6).

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