Water seal gas collection type blowout preventer

Abstract

The utility model discloses a water seal gas collection type blowout preventer which comprises a blowout prevention sleeve extending into a drill hole, and the outer side of the blowout prevention sleeve is sequentially and coaxially communicated with a connecting sleeve and a slag removal pipe. The connecting sleeve is downwards communicated with a slag receiving box, and a water spraying device is arranged on the side wall of the slag receiving box; a water outlet in the bottom of the slag receiving box is communicated to a water-slag-gas separation box through a hose; the water-slag-gas separation box comprises a water tank with a top opening, the interior of the water tank is divided into a left area and a right area, the side close to the hose is a dust removal drainage space, and the other side is a slag removal opening; the top of the dust removal drainage space of the water tank is communicated with a gas collection air duct; the gas collection air duct is an arc-shaped pipeline, an outlet of the gas collection air duct is communicated with the gas drainage pipeline through a drainage pipe, and the side wall of the gas collection air duct extends downwards to the position close to the bottom of the water tank. The gas extraction blowout device solves the problem that gas is prone to leakage due to the fact that a gas extraction blowout device in the prior art is poor in sealing performance.

Description

[Technical Field]

[0001] This utility model belongs to the field of mine gas extraction technology, specifically relating to a water-sealed gas-collecting blowout prevention device. [Background Technology]

[0002] In mining operations, gas outbursts during drilling are a serious threat to safe production. Current traditional gas control methods have many shortcomings. On the one hand, some simple ventilation methods are ineffective in handling large gas outbursts, easily leading to gas accumulation in the roadway, exceeding gas limits, and causing safety accidents. On the other hand, some existing blowout preventers are ineffective at separating drill cuttings, water, and gas, allowing drill cuttings to easily enter the drainage system, damaging equipment and affecting drainage efficiency. Moreover, these devices also have sealing defects, failing to effectively prevent gas leaks and thus failing to guarantee the safety of workers and normal mine production during disaster mitigation. [Utility Model Content]

[0003] The purpose of this invention is to provide a water-sealed gas-collecting anti-blowing device to solve the problem of easy gas leakage caused by sealing defects in existing gas extraction and blowout devices.

[0004] The present invention adopts the following technical solution: a water-sealed gas-collecting anti-blowout device, comprising an anti-blowout sleeve extending into the borehole, and a connecting sleeve and a slag removal pipe coaxially connected to the outside of the anti-blowout sleeve in sequence.

[0005] A slag receiving box is connected downwards via a connecting sleeve, and a water spraying device is installed on the side wall of the slag receiving box; the bottom drain of the slag receiving box is connected to a water-slag-gas separator via a hose.

[0006] The water-slag-gas separator includes a water tank with an open top. The inside of the water tank is divided into two areas, left and right. The side near the hose is the dust extraction space, and the other side is the slag removal port.

[0007] A gas collection duct is connected to the top of the dust extraction space of the water tank; the gas collection duct is an arc-shaped pipe, and its outlet is connected to the gas extraction pipeline through the extraction pipe. The side wall of the gas collection duct extends downward to a position close to the bottom of the water tank.

[0008] The water-slag-gas separator is used to collect water, drill cuttings, and methane gas discharged from the blowdown sleeve; the water tank is used to collect water, and its bottom is used to deposit drill cuttings; the gas collection duct is used to discharge methane gas.

[0009] Furthermore, a dust-proof plate is installed on the inner wall of the air collection duct near the top, close to the connection between the hose and the water tank, pointing downwards; a water spray device is installed on the top of the dust-proof plate.

[0010] Furthermore, the water tank has a drain outlet at the bottom and an overflow outlet at the top.

[0011] Furthermore, an extraction pipe is connected to the inlet of the air collecting duct and the extraction space located on one side of the dustproof plate.

[0012] Furthermore, the connecting sleeve is connected to the gas extraction pipeline via the extraction pipe.

[0013] The beneficial effects of this utility model are:

[0014] 1. Effectively prevents excessive gas levels: This device uses water seals and gas collection ducts to collect and guide the surging gas into the drainage system in a timely manner, greatly reducing the risk of gas exceeding the limit due to gas inrush into the roadway and ensuring the safety of the mine working environment.

[0015] 2. High-efficiency separation of water, slag, and gas: Through the synergistic action of the slag receiving box, separation box, and dust-proof plate, effective separation of drill cuttings, water, and gas can be achieved. Drill cuttings are isolated in a specific space, dusted, and deposited at the bottom of the separation box, preventing them from entering the extraction system, extending the service life of the extraction equipment, and improving the stability and efficiency of the extraction system.

[0016] 3. Simple overall structure and easy operation: The device consists of main components such as blowout preventer sleeve, slag receiving box and water-slag-gas separator, which are connected by hoses. The structure is simple, easy to install and disassemble, and can be quickly deployed and adjusted in complex mine environments, thus improving work efficiency. [Attached Image Description]

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Among them, 1. Blowout preventer sleeve, 2. Slag receiving box, 3. Water tank, 4. Dustproof plate, 5. Drain outlet, 6. Gas collection duct, 7. Drainage pipe, 8. Overflow outlet, 9. Slag removal pipe, 10. Flexible hose, 11. Gas drainage pipeline, 12. Connecting sleeve, 13. Water spraying device, 14. Slag removal port.

Detailed Implementation Methods

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0020] This utility model provides a water-sealed gas-collecting anti-spray device, such as... Figure 1 As shown, the system includes a blowout preventer (BOP) sleeve 1, which is used to extend into the borehole during drilling. A connecting sleeve 12 and a slag removal pipe 9 are coaxially connected to the outer side of the BOP sleeve 1.

[0021] A cuttings receiving box 2 is connected downwards to the connecting sleeve 12. The cuttings receiving box 2 is inverted conical in shape, and a water spraying device 13 is installed on the side wall of the cuttings receiving box 2. The water spraying device 13 is used to spray water onto the drill cuttings to reduce dust, and the cuttings receiving box 2 is used to receive the drill cuttings, water and gas discharged during drilling.

[0022] The bottom drain of the slag receiving box 2 is connected to a water-slag-gas separation box via a flexible hose 10. The water-slag-gas separation box includes a water tank 3 with an open top. The interior of the water tank 3 is divided into two spaces, left and right. The side closer to the flexible hose 10 is a dust removal and extraction space, and the other side is a slag removal port 14, through which drill cuttings at the bottom of the water tank 3 can be cleaned.

[0023] A gas collecting duct 6 is connected to the top of the dust extraction space of water tank 3. The gas collecting duct 6 is an arc-shaped pipe, and its outlet is connected to the gas extraction pipeline 11 through the extraction pipe 7. One end of the gas extraction pipeline 11 is connected to a pump for extracting gas. The gas collecting duct 6 is used to temporarily collect a large amount of gas gushing out of the hole when the gas gushing out is large, and then the collected gas is extracted to the gas extraction pipeline 11 through the extraction pipe 7.

[0024] The sidewall of the gas collecting duct 6 extends downwards to near the bottom of the water tank 3, but it does not contact the bottom of the water tank 3. Its purpose is solely to isolate the gas from external contact when the sidewall is below the water surface, ensuring that the gas can only be discharged through the gas collecting duct 6. The water level in the water tank 3 must exceed the lower end of the sidewall of the gas collecting duct 6 to create a water seal.

[0025] The water-slag-gas separator is used to collect water, drill cuttings and methane gas discharged from the blowout sleeve 1; the water tank 3 is used to collect water, and its bottom is used to deposit drill cuttings; the gas collection duct 6 is used to discharge methane gas.

[0026] In some embodiments, a dust-separating plate 4 is provided on the inner wall near the top of the air collecting duct 6, near the connection between the hose 10 and the water tank 3, and downwards. The dust-separating plate 4 is used to divide the interior of the dust collection and extraction space into a dust collection space and an extraction space, and to isolate drill cuttings from the extraction space. A water spraying device 13 is provided on the top of the dust-separating plate 4 for dust suppression.

[0027] In some embodiments, the water tank 3 is provided with a drain outlet 5 at the bottom and an overflow outlet 8 at the top. When the water level in the tank reaches the height of the overflow outlet 8, the water is discharged through the overflow outlet.

[0028] In some embodiments, a drainage pipe 7 is connected to the inlet of the gas collecting duct 6 and the drainage space located on one side of the dustproof plate 4, and the drainage pipe 7 is connected to the gas drainage pipeline 11.

[0029] In some embodiments, the connecting sleeve 12 is connected to the gas extraction pipeline 11 via the extraction pipe 7.

[0030] The method of using the water-sealed air-collecting anti-blowout device of this utility model is as follows:

[0031] S1. Installation Preparation: Before drilling, place the water-slag-gas separator in a suitable location and ensure its stability. Connect the slag receiving box to the inlet of the water-slag-gas separator via a 6-inch flexible hose 10. Then, install the blowout preventer 1 inside the borehole and connect the gas collection duct 6 and the extraction pipe 7, ensuring that all connections are well sealed.

[0032] S2. Drilling Operation: After drilling begins, drill cuttings are discharged from the blowout preventer 1 to the slag collection box 2 with the water flow, and then enter the water tank 3 of the water-slag-gas separator through the drain outlet at the lower end of the slag collection box 2. Inside the water-slag-gas separator, the dust isolation plate 4 isolates the drill cuttings in the dust removal space near the slag inlet of the water tank. After dust removal, the drill cuttings fall into the water tank 3.

[0033] The gas gushing out of the borehole is sealed in the dust extraction space by the water tank 3. When the gas gushing out in large quantities, the gas collection duct 6 temporarily collects the large amount of gas gushing out, and then pumps the gas back into the gas extraction pipeline 11 through each extraction pipe 7.

[0034] Regular cleaning and maintenance are required during use. During operation, the coal slag deposited at the bottom of water tank 3 should be cleaned regularly through the slag removal port 14. The connection and sealing performance of each component should be checked, and damaged components should be replaced in a timely manner to ensure that the device is always in good working condition.

Claims

1. A water-sealed gas-collecting anti-blowout device, characterized in that, Includes a blowout preventer (1) extending into the borehole, and the outside of the blowout preventer (1) is coaxially connected to a connecting sleeve (12) and a slag removal pipe (9); The connecting sleeve (12) is connected downward to a slag receiving box (2), and the side wall of the slag receiving box (2) is provided with a water spraying device (13); the bottom drain of the slag receiving box (2) is connected to a water slag gas separator through a hose (10). The water-slag-gas separator includes a water tank (3) with an open top. The interior of the water tank (3) is divided into two areas, left and right. The side near the hose (10) is a dust removal and extraction space, and the other side is a slag removal port (14). A gas collecting duct (6) is connected to the top of the dust extraction space of the water tank (3); the gas collecting duct (6) is an arc-shaped pipe, and its outlet is connected to the gas extraction pipeline (11) through the extraction pipe (7). The side wall of the gas collecting duct (6) extends downward to a position close to the bottom of the water tank (3). The water-slag-gas separator is used to collect water, drill cuttings and methane gas discharged from the blowout sleeve (1); the water tank (3) is used to collect water and the bottom of it is used to deposit drill cuttings; the gas collection duct (6) is used to discharge methane gas.

2. The water-sealed gas-collecting anti-blowout device as described in claim 1, characterized in that, The air collecting duct (6) has a dustproof plate (4) on its inner wall near the top, at the connection between the hose (10) and the water tank (3), and a water spraying device (13) is provided on the top of the dustproof plate (4).

3. A water-sealed gas-collecting anti-blowout device as described in claim 1 or 2, characterized in that, The water tank (3) has a drain outlet (5) at the bottom and an overflow outlet (8) at the top.

4. The water-sealed gas-collecting anti-blowout device as described in claim 3, characterized in that, An extraction pipe (7) is connected to the inlet of the air collecting duct (6) and the extraction space located on one side of the dustproof plate (4).

5. A water-sealed gas-collecting anti-blowout device as described in claim 3, characterized in that, The connecting sleeve (12) is connected to the gas extraction pipeline (11) through the extraction pipe (7).

Images