Flexible bag for drilling blowout prevention and gas-water-coal separation device matched with flexible bag

Abstract

The drilling blowout prevention flexible bag comprises a blowout prevention sleeve, a gas-water-coal separation box and a blowout prevention buffer pipe, and the blowout prevention sleeve is fixed to the hole wall of a drill hole and connected with a jet flow buffer pipe, a drilling machine, a gas extraction pipe and the gas-water-coal separation box; an integrated spiral pushing filter box is arranged in the gas-water-coal separation box, and the cylindrical outer wall of the integrated spiral pushing filter box is made of metal with dense pores, so that water in a coal-water mixture can be effectively filtered out under the stirring of a spiral blade and the regular beating of a knocker below a pusher, flows into a water collecting tank through downhill and is discharged from a water outlet; the invention further discloses a process of the coal-water mixture separation system, the problem that impurities in coal are difficult to separate in traditional separation is solved, meanwhile, the problem that the labor intensity of workers is large is solved, cost is saved, and the coal-water mixture separation system is environmentally friendly.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine gas disaster prevention and control, and in particular to a flexible bag for drilling blowout prevention and a matching gas-water-coal separation device. Background Art

[0002] Ensuring safe production in coal mines and increasing the economic benefits of coal production are the key points that the country has always emphasized. my country's coalbed methane resources are rich and widely distributed. According to statistics, the amount of coalbed methane resources in my country within the shallow range of 2000m is 35 trillion cubic meters, which has great prospects for mining and utilization. The continuous development and improvement of coalbed methane mining technology at home and abroad has provided a strong technical guarantee for the development of coalbed methane at this stage. The effective development of coalbed methane is conducive to improving the energy structure and promoting the development of the national economy. Compared with developed countries in the world, my country's energy structure is extremely unreasonable, with a large proportion of coal, oil only one-third of the world average, and natural gas one-tenth. my country's energy shortage cannot meet the needs of the rapidly developing national economy. Only by vigorously developing new clean energy such as coalbed methane can we make up for the lack of energy in my country.

[0003] With the growing demand for high-quality, efficient and clean energy, the state and relevant provinces and regions have issued a number of policies to actively support and promote the development of the coalbed methane industry, especially in the main coal-producing areas, to promote the joint exploitation of coalbed methane and coal resources. The development and utilization of coalbed methane has multiple values. It can not only significantly reduce the coal mine gas accident rate and reduce the greenhouse gas emissions from mines, but also generate huge economic benefits as a clean energy source. It is of great significance to ensure energy security and reduce the external dependence on natural gas. Therefore, from the perspective of resource development and environmental protection, the efficient separation of water gas is of great significance.

[0004] Jet punching technology is an important means to improve the gas extraction rate. The "Regulations on the Prevention and Control of Coal and Gas Outbursts" require the use of two regional outburst prevention measures for outburst coal seams: protective layer mining and pre-extraction of coal seam gas. However, some coal seams in my country do not have the conditions for protective layer mining, and only regional outburst prevention measures of pre-extraction of coal seam gas can be adopted. There are many methods for pre-extraction of coal seam gas. Among them, the measure of pre-extraction of coal seam gas strips by drilling through the bottom rock tunnel is promoted because it is safer to extract gas by drilling through the layer in the rock tunnel. However, in most outburst coal seams with low permeability, the gas extraction decays quickly, resulting in a long pre-extraction time, which in turn causes serious imbalance in the extraction, excavation, and mining of the mine. For this reason, it is necessary to first strengthen the permeability enhancement measures for low-permeability coal seams. Among various permeability enhancement measures, jet punching measures are usually matched with pre-extraction of coal seam gas strips by drilling through the bottom rock tunnel, which is a simple and effective permeability enhancement method and has been promoted and applied in many coal mines. Summary of the invention

[0005] The present invention aims to provide a flexible bag for drilling blowout prevention and a matching gas-water-coal separation device, which solves the problems of difficulty in separating impurities in coal and high labor intensity in traditional separation, while saving costs and being environmentally friendly.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flexible bag for drilling blowout prevention and a matching gas-water-coal separation device, comprising a drilling rig, a gas-water-coal separation box and a gas extraction pipe, the drilling rig is connected to a high-pressure drill pipe, the outer shell of the high-pressure drill pipe is provided with a blowout prevention casing, the blowout prevention casing is a three-pronged pipe structure, the main pipe head end of the blowout prevention casing is flange-connected to a blowout prevention buffer pipe, the blowout prevention buffer pipe comprises a bag body, both ends of the bag body are provided with flange plates, a plurality of steel wire ropes are arranged inside the bag body, the main pipe tail end of the blowout prevention casing is sealed and connected to the drilling rig, the two branches of the blowout prevention casing are respectively connected to the gas extraction pipe and the gas-water-coal separation box, the gas-water-coal separation box is a rectangular structure box, and the top two sides of the gas-water-coal separation box are respectively provided with a slag inlet and an exhaust port. The blowout prevention sleeve is connected with the gas-water-coal separation box through the slag inlet, the exhaust port is connected with the gas extraction pipe, a water transport slope is arranged in the middle of the gas-water-coal separation box, the water-coal separation box is separated into a water collection box and a coal collection box by the water transport slope, an integrated spiral push filter box is arranged horizontally in the middle of the water collection box, the left and right ends of the integrated spiral push filter box are respectively connected with the slag inlet and the coal collection box, the spiral device inside the integrated spiral push filter box is connected with a power supply motor, a plurality of electric knockers are arranged on the water transport slope, the knocking part of the electric knocker is in contact with the outer box body of the integrated spiral push filter box, a conveying crawler is arranged at the bottom of the coal collection box, and a revolving door is hinged on the side wall of the coal collection box in the running direction of the conveying crawler.

[0007] Preferably, the blowout prevention casing and the gas extraction pipe are connected through a main exhaust pipe, the blowout prevention casing and the slag inlet are connected through a slag discharge hose, the exhaust port and the gas extraction pipe are connected through a secondary exhaust pipe, and a control valve is provided on the secondary exhaust pipe.

[0008] Preferably, a drain port is provided at the bottom end of the side wall of the water collection box, and the outer diameter of the drain port is consistent with the inner diameter of the slag discharge hose, the auxiliary exhaust pipe and the drain pipe.

[0009] Preferably, the above process for preventing the nozzle from separating the gas-water-coal mixture device comprises the following steps:

[0010] Step 1: delivering a solution containing a surfactant to a drilling rig to perform perforation enhancement on the coal seam;

[0011] Step 2: The water gas generated during the drilling process is buffered through the blowout prevention casing, the gas is discharged through the main exhaust pipe, and the water gas flows into the gas-water-coal separation box through the slag discharge hose. At the same time, the gas can also be discharged through the auxiliary exhaust pipe;

[0012] Step three: In the gas-water-coal separation box, after the gas is discharged through the auxiliary exhaust pipe, the water-coal mixture flows into the integrated spiral push filter box; start the power motor to rotate the spiral device in the integrated spiral push filter box to push the water-coal mixture to separate; the electric knocker regularly knocks the water-coal mixture to promote the separation of coal powder and water; the separated water flows into the water collection box through the water transport slope, and is discharged through the drain outlet for recycling; after the coal powder is separated in the spiral push filter box, it moves to the left through the conveyor belt and accumulates in the coal collection box; after the punching process is completed, the coal collection box is opened through the revolving door to recycle the separated coal powder.

[0013] The principle and beneficial effects of this technical solution:

[0014] The present invention utilizes a solution containing a surfactant to perform jet punching operations, adopts a structural design of a blowout prevention sleeve and a gas-water-coal separation box, and realizes effective separation of a gas-water-coal mixture through components such as a blowout prevention buffer pipe and an integrated spiral push filter box. The three-pronged pipe structure of the blowout prevention sleeve and the capsule design of the blowout prevention buffer pipe can buffer the impact of the water-coal mixture when a blowout occurs, thereby reducing the risk of blowout accidents. The design of the water transport slope and the integrated spiral push filter box inside the gas-water-coal separation box enables the water-coal mixture to be effectively separated from coal powder and water under the stirring and pushing action of the spiral blades and the regular knocking of the electric knocker. The separated water is discharged through the drain outlet for recycling, while the coal powder is moved by the conveyor track and accumulated in the coal collection box, and finally recovered through the revolving door.

[0015] The above design improves the efficiency of coalbed methane development, and the jet punching technology improves the gas extraction rate, which helps to improve the energy structure and promote the development of the national economy. It effectively reduces the coal mine gas accident rate and reduces the greenhouse gas discharged from the mine. At the same time, as a clean energy, it produces huge economic benefits. It reduces the intensity of manual labor, reduces labor costs and improves operation safety through the automated separation and recovery process. By recycling the separated water and coal powder, it reduces resource waste and meets the requirements of sustainable development. By improving separation efficiency and reducing manual labor, the overall operating cost is reduced. By reducing the risk of spray hole accidents and improving separation efficiency, the safe production of coal mines is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2It is an overall schematic diagram of the gas-water-coal separation box in the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the blowout prevention buffer pipe of the present invention;

[0019] In the figure: 1. Drilling rig; 2. High-pressure drill pipe; 3. Blowout prevention casing; 4. Blowout prevention buffer pipe; 5. Bladder; 6. Wire rope; 7. Flange; 8. Conveyor track; 9. Main exhaust pipe; 10. Slag discharge hose; 11. Gas extraction pipe; 12. Control valve; 13. Auxiliary exhaust pipe; 14. Gas-water-coal separation box; 15. Slag inlet; 16. Exhaust port; 17. Water collection box; 18. Power supply motor; 19. Integrated spiral push filter box; 20. Electric knocker; 21. Drainage outlet; 22. Coal collection box; 23. Revolving door. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the accompanying drawings and embodiments:

[0021] Figure 1-2 As shown, a flexible bag for drilling blowout prevention and its matching gas-water-coal separation device include a drilling rig 1, a gas-water-coal separation box 14 and a gas extraction pipe 11. The front end of the drilling rig 1 is connected to a high-pressure drill rod 2, and the high-pressure drill rod 2 passes through the main pipe of the blowout prevention casing 3 and drills into the coal seam to perform jet punching operation. In the jet punching operation, high-pressure water containing a surfactant enters the borehole to punch and increase the permeability of the coal seam. The high-pressure water containing the surfactant can be prepared in a pump station water tank. The pump station water tank is connected to the input end of a high-pressure emulsion pump. A pressure gauge is provided on the high-pressure emulsion pump, and its output end is connected to the rear end of the drilling rig 1 through a high-pressure water pipe. The concentration of the surfactant solution is prepared according to the concentration ratio shown by the pressure gauge of the high-pressure emulsion pump. The pump station water tank generally has a stirrer, and the solution can be uniformly stirred by the stirrer. Under the action of the surfactant, pulverized coal with a large contact angle and poor wettability is flushed out of the borehole, which can be beneficial to the separation and filtration of coal powder and water.

[0022] The blowout prevention casing 3 is a trident-shaped pipe body, one end of the main pipe is connected to the blowout prevention buffer pipe 4, the blowout prevention buffer pipe 4 includes a sac 5, both ends of the sac 5 are provided with flanges 7, a plurality of steel wire ropes 6 are provided inside the sac 5, the tail end of the main pipe of the blowout prevention casing 3 is sealed and connected to the drilling rig 1, the sac 5 has good stretchability, and can expand under the impact of the water-coal mixture, and its principle is similar to that of a balloon, the steel wire rope 6 is used to limit the size of the deformation of the sac 5, and can avoid the sac 5 from being damaged, the blowout prevention buffer pipe 4 is fixed to the borehole wall through the flange 7, the blowout prevention buffer pipe 4 can make the water-coal mixture flow normally into the blowout prevention casing 3 when no blowout occurs, and when the blowout occurs When the gas gushing out of the borehole enters the gas extraction pipe 11 through the main exhaust pipe 9, the gas gushing out of the borehole enters the gas extraction pipe 11 through the main exhaust pipe 9 under the action of negative pressure, and the port of the downward branch pipe is connected to the slag discharge hose 10, and the water-coal slag gushing out of the borehole flows into the water-gas separation box through the slag discharge hose 10.

[0023] like Figure 1-3 As shown, the water-gas separation box is a square structure box, and a slag inlet 15 and an exhaust port 16 are arranged on the top of the box, and the outer diameters thereof are respectively consistent with the inner diameters of the slag discharge hose 10 and the auxiliary exhaust pipe 13, so that the slag discharge hose 10 can be adaptively installed on the slag inlet 15, and similarly, the auxiliary exhaust pipe 13 can also be adaptively installed on the exhaust port 16, and the other end of the auxiliary exhaust pipe 13 is connected to the gas extraction pipe 11, and a control valve 12 is also provided at the connection; when a lot of gas gushes out of the borehole and the main exhaust pipe 9 cannot discharge it in time, the gas entering the box will flow through the auxiliary exhaust pipe 13 under the action of negative pressure, and enter the gas extraction pipe 11 for discharge.

[0024] A process for a flexible bag for drilling blowout prevention and a matching gas-water-coal separation device is specifically carried out in the following steps:

[0025] Step 1: Before the jet punching operation, a solution containing a surfactant is prepared in the water tank of the pump station; during the jet operation, a high-pressure emulsion pump is used to transport the above-mentioned solution containing a surfactant to the drilling rig 1 through a high-pressure water pipe, and then the coal seam is punched to increase the permeability. The surfactant can flush out the pulverized coal with a large contact angle and poor wettability in the borehole, which is beneficial to the separation and filtration of coal powder and water in the integrated spiral push filter box 19.

[0026] Step 2: Fix one end of the blowout prevention sleeve 3 on the borehole wall, and the water gas generated during the drilling process is buffered by the blowout prevention sleeve 3. Under the action of negative pressure, the gas enters the gas extraction pipe 11 through the main exhaust pipe 9 and is discharged, and the water gas flows into the gas-water-coal separation box 14 through the slag discharge hose 10. At the same time, the gas can also enter the gas extraction pipe 11 through the auxiliary exhaust pipe 13 and be discharged.

[0027] Step three: In the gas-water-coal separation box 14, after the gas enters the gas extraction pipe 11 through the auxiliary exhaust pipe 13 and is discharged, the water-coal mixture flows into the integrated spiral push filter box 19; the power supply motor 18 is turned on so that the coal-water mixture is stirred and pushed by the spiral blades and the electric knocker 20. The regular knocking, the coal powder and the water are gradually separated and filtered, and the water passes through the integrated spiral push filter box 19 and falls on the slope provided with the electric knocker 20, and flows into the water collection box 17 along the slope, and is discharged from the water-coal-gas separation box through the drain outlet 21 for recycling; after the coal powder is separated by the integrated spiral push filter box 19, it falls through the right side of the box body, and is accumulated in the coal collection box 22 to the left along the conveyor crawler 8. After the punching process is completed, the revolving door 23 can be opened to recycle the coal powder.

[0028] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions or characteristics in the solution is not described in detail here. For those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A flexible bag for drilling blowout prevention and its matching gas-water-coal separation device, characterized in that: The invention comprises a drilling rig (1), a gas-water-coal separation box (14) and a gas extraction pipe (11), wherein the drilling rig (1) is connected to a high-pressure drill pipe (2), the outer shell of the high-pressure drill pipe (2) is provided with a blowout prevention casing (3), the blowout prevention casing (3) is a three-pronged pipe structure, the main pipe head end of the blowout prevention casing (3) is flange-connected to a blowout prevention buffer pipe (4), the blowout prevention buffer pipe (4) comprises a capsule (5), both ends of the capsule (5) are provided with flanges (7), and the capsule (5) is provided with a A plurality of steel wire ropes (6) are arranged, the main tail end of the blowout prevention casing (3) is sealedly connected to the drilling rig (1), the two branches of the blowout prevention casing (3) are respectively connected to the gas extraction pipe (11) and the gas-water-coal separation box (14), the gas-water-coal separation box (14) is a rectangular structure box, the top two sides of the gas-water-coal separation box (14) are respectively provided with a slag inlet (15) and an exhaust port (16), the blowout prevention casing (3) is connected to the gas extraction pipe (11) and the gas-water-coal separation box (14), and the gas-water-coal separation box (14) is connected to the gas extraction pipe (11) and the gas-water-coal separation box (14). The gas-water-coal separation box (14) is connected to the gas extraction pipe (11), the gas-water-coal separation box (14) is provided with a water transport slope in the middle, the water-coal separation box is separated into a water collection box (17) and a coal collection box (22) by the water transport slope, an integrated spiral push filter box (19) is transversely provided in the middle of the water collection box (17), and the left and right ends of the integrated spiral push filter box (19) are respectively connected to the slag inlet (15) and the coal collection box (22), the spiral device inside the integrated spiral push filter box (19) is connected to a power supply motor (18), the water transport slope is provided with a plurality of electric knockers (20), the knocking parts of the electric knockers (20) are in contact with the outer box body of the integrated spiral push filter box (19), the bottom end of the coal collection box (22) is provided with a conveying crawler (8), and the side wall of the coal collection box (22) in the running direction of the conveying crawler (8) is hinged with a revolving door (23).

2. A flexible bag for drilling blowout prevention and a matching gas-water-coal separation device according to claim 1, characterized in that: The blowout prevention sleeve (3) and the gas extraction pipe (11) are connected via a main exhaust pipe (9), the blowout prevention sleeve (3) and the slag inlet (15) are connected via a slag discharge hose (10), the exhaust port (16) and the gas extraction pipe (11) are connected via an auxiliary exhaust pipe (13), and a control valve (12) is provided on the auxiliary exhaust pipe (13).

3. A flexible bag for drilling blowout prevention and a matching gas-water-coal separation device according to claim 4, characterized in that: A drainage port (21) is provided at the bottom end of the side wall of the water collection box (17), and the outer diameter of the drainage port (21) is consistent with the inner diameters of the slag discharge hose (10), the auxiliary exhaust pipe (13) and the drainage pipeline.

4. A process for producing the flexible bag for drilling blowout prevention and the gas-water-coal separation device as claimed in claims 1 to 5, characterized in that: The following steps are involved: Step 1: delivering a solution containing a surfactant to a drilling machine (1) to perform perforation and permeability enhancement on the coal seam; Step 2: The water gas generated during the drilling process is buffered through the blowout prevention casing (3), and the gas is discharged through the main exhaust pipe (9). The water gas flows into the gas-water-coal separation box (14) through the slag discharge hose (10). At the same time, the gas can also be discharged through the auxiliary exhaust pipe (13); Step 3: In the gas-water-coal separation box (14), after the gas is discharged through the auxiliary exhaust pipe (13), the water-coal mixture flows into the integrated spiral push filter box (19); the power supply motor (18) is started to rotate the spiral device in the integrated spiral push filter box (19) to push the water-coal mixture to separate; the electric knocker (20) regularly knocks the water-coal mixture to promote the separation of coal powder and water; the separated water flows into the water collection box (17) through the water transport slope and is discharged through the drain port (21) for recycling; after the coal powder is separated in the spiral push filter box, it moves to the left through the conveyor crawler (8) and accumulates in the coal collection box (22); after the punching process is completed, the coal collection box (22) is opened through the revolving door (23) to recycle the separated coal powder.

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