Totally-closed water seal type blowout prevention hole device

Abstract

The invention relates to the technical field of totally-closed water seal type hole spraying prevention and discloses a totally-closed water seal type hole spraying prevention device which comprises a drilling machine, one end of the drilling machine is connected with a hole opening three-proofing device, and the other end of the hole opening three-proofing device is sleeved with a sleeve. According to the orifice three-proofing device, the choke disc is welded in the orifice three-proofing device, the sealing gaskets can be fixed to the choke disc, and the gap is reserved between the choke disc and the outer side cover plate so that the other two sealing gaskets can be installed, zero gap between the drill rod and the sealing gaskets and zero gap between the sealing gaskets and the orifice three-proofing device can be achieved, and therefore the full-sealing performance of the orifice three-proofing device is achieved; the water level height is difficult to control in the using process of the horizontal type blowout prevention box, and deposited coal cinder is prone to blocking a water outlet pipe, so that a drainage water pipe device is additionally arranged on the inner side of the horizontal type blowout prevention box, the drainage water pipe device can change the drainage strength by controlling the size of a water pipe valve switch, and therefore the stability of the water level in the vertical type blowout prevention box is achieved, and the water sealing effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of fully enclosed water-sealed anti-spray holes, and in particular to a fully enclosed water-sealed anti-spray hole device. Background Art

[0002] As the mining depth of coal mines continues to increase, the difficulty of controlling gas disasters continues to increase. During the underground penetration and layer drilling construction in coal mines, in order to prevent a large amount of gas from spraying out of the borehole and causing gas exceeding the limit or even gas explosion, a blowout prevention device is used between the borehole and the main pipe of the extraction pipe. The use of the blowout prevention device can prevent the instantaneous large-scale gas outflow caused by the blowhole to a certain extent, and avoid accidents of gas exceeding the limit and explosion.

[0003] The defects of the existing blowout prevention device in preventing blowout are as follows: (1) The slag outlet of the blowout prevention device is directly connected to the atmosphere. When a large number of gas blowouts occur, due to the limited space in the blowout prevention device, once the extraction capacity is less than the blowout intensity, it will cause serious gas over-limit and explosion accidents. (2) The three-proof devices at the orifice (dust-proof, gas-proof, and blowout-proof, the same below) in the existing blowout prevention device are mostly made of iron materials. During the construction process, the iron drill rod is in a rotating state, and there is hard friction between the orifice three-proof devices, resulting in a gap in the structure. The water slag, air, gas, and dust generated during the drilling construction process are very easy to overflow from the gap, which is not convenient for civilized and hygienic management on site, and it cannot prevent the gas from gushing out from the gap when the gas blowout occurs in the drill hole. It can only reduce the intensity of gas over-limit to a limited extent. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a fully enclosed water-sealed anti-spout hole device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A fully enclosed water-sealed anti-spout hole device, comprising: A drilling rig, one end of which is connected to an orifice three-proof device, and the other end of which is sleeved with a casing, one side of the outer wall of the orifice three-proof device is connected to a first corrugated steel pipe, and the other side of the outer wall of the orifice three-proof device is connected to a first connecting hose, the other end of the first corrugated steel pipe is flange-connected to a vertical gas-water separation device, and the top of the vertical gas-water separation device is connected to a transparent connecting hose, the other end of the transparent connecting hose is flange-connected to a horizontal blowout preventer box, and the outer wall of the transparent connecting hose is connected to the other end of the first connecting hose, and the top of the horizontal blowout preventer box is connected via a transparent connecting hose A second corrugated steel pipe is connected, a second connecting hose is installed on one side of the outer wall of the vertical gas-water separation device, and the end of the second connecting hose is connected to the metering coal pool, the other end of the drilling rig is connected to an operating table, and a suction hose is installed at the input end of the operating table, the other end of the suction hose is connected to the vertical gas-water separation device, the access end of the operating table is connected to the air supply pipeline through a pipeline, and the access end of the operating table is connected to the second water supply pipeline through a pipeline, the access end of the orifice three-proof device is installed with a first water supply pipeline through a pipeline, and the first water supply pipeline is connected to the vertical gas-water separation device through a pipeline.

[0006] Preferably, the inner cavity of the orifice three-proof device is provided with a baffle disk, a sealing gasket is provided on the inner side, and two sealing gaskets are provided on the outer side.

[0007] Preferably, the transparent connecting hose is connected to the horizontal blowout preventer box in a U-shape, and the highest point of the transparent connecting hose is hung on the top plate of the tunnel.

[0008] Preferably, the side opposite to the lower water outlet of the vertical gas-water separation device is directly connected to the water supply pipe.

[0009] Preferably, a drain elbow is provided at the bottom of the horizontal blowout preventer.

[0010] A technical application of a fully enclosed water-sealed anti-blowout hole device includes: drilling construction, punching operation and sealing operation. The specific steps of the drilling construction are: Step 1: Use the drill bit of the drilling rig to carry out construction until the coal point is seen. During the construction, use the hydraulic slag removal process to drill. Before changing the drill pipe, open the air-water pumping conversion tee, and use the pumping to quickly pump the water in the drill pipe into the vertical gas-water separation device; Step 2: Drill through the coal after seeing the coal, use the wind-driven slag removal process to drill, open the wind-water pumping conversion tee before changing the drill pipe, and use the pumping to pump the drill pipe compressed air into the vertical gas-water separation device; Step 3: After stopping the coal, continue to use wind power to remove slag and drill for at least 0.5m; Step 4: After reporting to the video surveillance center, raise the sign and start drilling, remove all the drill rods in the hole, replace the drill bit with a diameter of 94mm, and install a punch behind the drill bit; Step 5: After replacing the drill bit, move the drill rod to the position 5m before the coal point, replace the drill rod with a round drill rod, and replace the sealing gasket in the hole mouth three-proof device with a round hole type sealing gasket.

[0011] Preferably, the specific steps of the punching operation are: Step 1: Check the three gaskets again before punching, and replace them in time if they are not well sealed; Step 2: Move the drill pipe to the coal stop point, and use static pressure air to expand the hole from top to bottom. If the coal output per hour is less than 0.5 tons, stop expanding the hole; Step 3: Move the drill pipe back to the coal stop point, and from top to bottom, use the air compressor to supply air to expand the hole. If the coal output per hour is less than 0.5 tons, stop expanding the hole; Step 4: withdraw the drill pipe to 1-2m below the coal point, use static pressure water to wash the hole, and wait until the hole mouth returns to clean water before carrying out uniform speed and pressure hydraulic coal expansion from the coal point to the coal stop point from bottom to top. If the coal output per hour is less than 1 ton, stop expanding the hole; Step 5: withdraw the drill pipe to 1-2m below the coal point, use an emulsified pump to supply water, and the pressure should not exceed 15MPa, to expand the hole until the coal volume reaches the required standard; Step 6: During the punching process, the water level gauge height on the vertical gas-water separation device and the horizontal blowout preventer is used to determine whether the extraction pipeline is blocked or unobstructed, and the water level gauge height is 10-50cm; Step 7: During the punching process, observe the amount of coal being punched, whether the slag discharge is unobstructed, and whether the pipeline is blocked through the water level observation device and observation window on the vertical gas-water separation device at any time. If any abnormality is found, stop the operation immediately and deal with it.

[0012] Preferably, the specific steps of the sealing operation are: Step 1: The sealing bag or air bag is 2-3m away from the coal point, a 2m solid pipe is installed in front of the sealing bag or air bag, and the sealing bag or air bag inflation (grouting) pipe extends 0.5-1m outside the hole for inflation (grouting); Step 2: Run the screen pipe throughout the coal seam section. If the screen pipe cannot be run throughout the entire section due to hole collapse, run the hole at least once. If the screen pipe cannot be run throughout the entire section after running the hole, ensure that the screen pipe enters at least 4m inside the coal-rock boundary. If the length of the coal penetration is less than 5m, the sealing screen pipe shall enter the coal seam for no less than 2m. Step 3: The 50mm diameter pipe column (grouting type B column) is fixed at a distance of 2m from the hole mouth. The 16mm diameter bag grouting pipe is black, and the 16mm diameter rock section grouting pipe is white. Both are exposed for 1-2m and can be connected with quick connectors; Step 4: It is strictly forbidden to remove the tee and negative pressure extraction pipeline before sealing the hole; the hole is strictly forbidden to be exposed before lowering the sealing pipe. The hole can be wrapped with air duct cloth to seal the hole. In case of hole collapse or other situations where the hole is not sealed to the designed position, immediately withdraw the sealing pipeline and carry out hole sweeping operations.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, a baffle plate is welded inside the orifice three-proof device, a sealing gasket can be fixed on the baffle plate, and a gap is left between the baffle plate and the outer cover plate to install the other two sealing gaskets, so as to achieve zero gap between the drill rod and the sealing gasket, and zero gap between the sealing gasket and the orifice three-proof device, thereby achieving full airtightness of the orifice three-proof device; it is difficult to control the water level height of the horizontal blowout preventer during use, and the deposited coal slag is easy to block the water outlet pipe, so a drainage water pipe device is added inside the horizontal blowout preventer, and the drainage water pipe device can change the drainage intensity by controlling the size of the water pipe valve switch, thereby achieving the stability of the water level in the vertical blowout preventer and thus achieving a water seal; a one-way anti-reverse air distribution valve is added above the orifice three-proof device to reduce the fluctuation of the negative pressure of the extraction, further ensure the stability of the water level in the vertical blowout preventer, and can prevent gas backflow when the hole is sprayed in the hole. At the same time, when the one-way anti-reverse air distribution valve is closed due to the spray hole, it can remind the drilling rig driver that the hole is abnormal and measures should be taken in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Legend: 1. Drilling rig; 2. Casing; 3. Hole mouth three-proof device; 4. First corrugated steel pipe; 5. First connecting hose; 6. Vertical gas-water separation device; 7. Transparent connecting hose; 8. Second connecting hose; 9. Horizontal blowout prevention box; 10. Measuring coal pool; 11. Second corrugated steel pipe; 12. Pumping hose; 13. First water supply pipeline; 14. Air supply pipeline; 15. Second water supply pipeline; 16. Operating table. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Reference Figure 1A fully enclosed water-sealed anti-blowout hole device comprises a drilling rig 1, one end of the drilling rig 1 is connected to a hole mouth three-proof device 3, and the other end of the hole mouth three-proof device 3 is sleeved with a sleeve 2, one side of the outer wall of the hole mouth three-proof device 3 is connected to a first corrugated steel pipe 4, and the other side of the outer wall of the hole mouth three-proof device 3 is connected to a first connecting hose 5, the other end of the first corrugated steel pipe 4 is flange-connected to a vertical gas-water separation device 6, and the top of the vertical gas-water separation device 6 is connected to a transparent connecting hose 7, the other end of the transparent connecting hose 7 is flange-connected to a horizontal anti-blowout box 9, and the outer wall of the transparent connecting hose 7 is connected to the other end of the first connecting hose 5, and the top of the horizontal anti-blowout box 9 is connected to the transparent connecting hose 7 is connected to a second corrugated steel pipe 11, a second connecting hose 8 is installed on one side of the outer wall of the vertical gas-water separation device 6, and the end of the second connecting hose 8 is connected to a metering coal pool 10, the other end of the drilling rig 1 is connected to an operating table 16, and a suction hose 12 is installed at the input end of the operating table 16, and the other end of the suction hose 12 is connected to the vertical gas-water separation device 6, the access end of the operating table 16 is connected to an air supply pipeline 14 through a pipeline, and the access end of the operating table 16 is connected to a second water supply pipeline 15 through a pipeline, and the access end of the orifice three-proof device 3 is installed with a first water supply pipeline 13 through a pipeline, and the first water supply pipeline 13 is connected to the vertical gas-water separation device 6 through a pipeline.

[0018] The inner cavity of the orifice three-proof device 3 is provided with a baffle plate, a sealing gasket is provided on the inner side, and two sealing gaskets are provided on the outer side. A gap is left between the baffle plate and the outer cover plate to install the other two sealing gaskets, so as to achieve zero gap between the drill rod and the sealing gasket, and zero gap between the sealing gasket and the orifice three-proof device 3, thereby realizing full airtightness of the orifice three-proof device 3.

[0019] The transparent connecting hose 7 and the horizontal blowout prevention box 9 are connected in a U-shape, and the highest point of the transparent connecting hose 7 is hung on the tunnel roof, thereby playing a role in gas-water separation. The transparent material facilitates observation of water flow.

[0020] The opposite side of the lower water outlet of the vertical gas-water separation device 6 is directly connected to the water supply pipe. During the drilling construction process, the water pipe here is often open to effectively prevent the accumulated slag from blocking the water outlet.

[0021] A drain elbow is provided at the bottom of the horizontal blowout preventer box 9, and two valves are provided to drain the horizontal blowout preventer box 9.

[0022] A technical application of a fully enclosed water-sealed anti-blowout hole device includes: drilling construction, punching operation and sealing operation. The specific steps of drilling construction are: Step 1: Use the drill bit of the drilling rig 1 to carry out construction until the coal point is seen, and use the hydraulic slag removal process to drill during the process. Before changing the drill pipe, open the air-water pumping conversion tee, and use the pumping to quickly pump the water in the drill pipe into the vertical gas-water separation device 6; Step 2: Drill through the coal after seeing the coal, use the wind-driven slag removal process to drill, open the wind-water pumping conversion tee before changing the drill pipe, and use the pumping to pump the drill pipe compressed air into the vertical gas-water separation device 6; Step 3: After stopping the coal, continue to use wind power to remove slag and drill for at least 0.5m; Step 4: After reporting to the video surveillance center, raise the sign and start drilling, remove all the drill rods in the hole, replace the drill bit with a diameter of 94mm, and install a punch behind the drill bit; Step 5: After replacing the drill bit, move the drill rod to a position 5m before the coal point, replace the drill rod with a round drill rod, and replace the sealing gasket in the hole mouth three-proof device 3 with a round hole type sealing gasket.

[0023] The specific steps of punching operation are: Step 1: Check the three gaskets again before punching, and replace them in time if they are not well sealed; Step 2: Move the drill pipe to the coal stop point, and use static pressure air to expand the hole from top to bottom. If the coal output per hour is less than 0.5 tons, stop expanding the hole; Step 3: Move the drill pipe back to the coal stop point, and from top to bottom, use the air compressor to supply air to expand the hole. If the coal output per hour is less than 0.5 tons, stop expanding the hole; Step 4: withdraw the drill pipe to 1-2m below the coal point, use static pressure water to wash the hole, and wait until the hole mouth returns to clean water before carrying out uniform speed and pressure hydraulic coal expansion from the coal point to the coal stop point from bottom to top. If the coal output per hour is less than 1 ton, stop expanding the hole; Step 5: withdraw the drill pipe to 1-2m below the coal point, use an emulsified pump to supply water, and the pressure should not exceed 15MPa, to expand the hole until the coal volume reaches the required standard; Step 6: During the punching process, the water level gauge height on the vertical gas-water separation device 6 and the horizontal blowout prevention box 9 is used to determine whether the extraction pipeline is blocked or unobstructed, and the water level gauge height is 10-50 cm; Step 7: During the punching process, the amount of coal punched, whether the slag discharge is smooth, and whether the pipeline is blocked are observed at any time through the water level observation device and the observation window on the vertical gas-water separation device 6. If any abnormality is found, the operation is stopped immediately for processing.

[0024] The specific steps of sealing operation are: Step 1: The sealing bag or air bag is 2-3m away from the coal point, a 2m solid pipe is installed in front of the sealing bag or air bag, and the sealing bag or air bag inflation (grouting) pipe extends 0.5-1m outside the hole for inflation (grouting); Step 2: Run the screen pipe throughout the coal seam section. If the screen pipe cannot be run throughout the entire section due to hole collapse, run the hole at least once. If the screen pipe cannot be run throughout the entire section after running the hole, ensure that the screen pipe enters at least 4m inside the coal-rock boundary. If the length of the coal penetration is less than 5m, the sealing screen pipe shall enter the coal seam for no less than 2m. Step 3: The 50mm diameter pipe column (grouting type B column) is fixed at a distance of 2m from the hole mouth. The 16mm diameter bag grouting pipe is black, and the 16mm diameter rock section grouting pipe is white. Both are exposed for 1-2m and can be connected with quick connectors; Step 4: It is strictly forbidden to remove the tee and negative pressure extraction pipeline before sealing the hole; the hole is strictly forbidden to be exposed before lowering the sealing pipe. The hole can be wrapped with air duct cloth to seal the hole. In case of hole collapse or other situations where the hole is not sealed to the designed position, immediately withdraw the sealing pipeline and carry out hole sweeping operations.

[0025] Working principle: When in use, first use the drill bit of the drilling rig 1 to carry out construction, and construct to the point where the coal is seen. During the construction, use the hydraulic deslagging process to drill, open the wind and water pumping conversion tee before changing the drill rod, and use the pumping to quickly pump the water in the drill rod into the vertical gas-water separation device 6; after seeing the coal, drill through the coal, use the wind deslagging process to drill, open the wind and water pumping conversion tee before changing the drill rod, and use the pumping to pump the drill rod compressed air into the vertical gas-water separation device 6; after stopping the coal, continue to use wind deslagging to drill for at least 0.5m; report to the video monitoring center and raise the sign to start drilling, pull out all the drill rods in the borehole, replace the drill bit with a diameter of 94mm, and install a puncher behind the drill bit; after replacing the drill bit, move the drill rod to a position 5m before the coal point, replace the drill rod with a round drill rod, and replace the sealing gasket in the hole mouth three-proof device 3 with a round hole type sealing gasket.

[0026] The specific steps of the punching operation are as follows: check the three sealing pads again before punching, and replace them in time if the sealing is not good; move the drill rod to the coal stop point, and use static pressure air to expand the hole from top to bottom. If the coal output per hour is less than 0.5 tons, stop expanding the hole; move the drill rod back to the coal stop point, and use air compressor to expand the hole from top to bottom. If the coal output per hour is less than 0.5 tons, stop expanding the hole; withdraw the drill rod to 1-2m below the coal point, use static pressure water to wash the hole, and wait until the hole mouth returns to clean water before carrying out uniform speed and pressure hydraulic expansion from the coal point to the coal stop point from bottom to top, such as the coal output per hour. When it is less than 1 ton, stop reaming; withdraw the drill rod to 1-2m below the coal point, use an emulsified pump to supply water, and the pressure must not exceed 15MPa, and reaming until the amount of coal in the reaming reaches the required standard; during the punching process, the height of the water level gauge on the vertical gas-water separation device 6 and the horizontal blowout preventer 9 is used to determine whether the extraction pipeline is blocked and unobstructed, and the high level of the water level gauge is 10-50cm; during the punching process, the water level observation device and observation window on the vertical gas-water separation device 6 are used to observe the amount of coal punched, whether the slag discharge is unobstructed, and whether the pipeline is blocked. If any abnormality is found, the operation will be stopped immediately for processing.

[0027] The specific steps of the hole sealing operation are as follows: the hole sealing bag or air bag is 2-3m away from the coal point, a 2m solid pipe is installed in front of the hole sealing bag or air bag, and the inflation (grouting) pipe of the hole sealing bag or air bag extends to 0.5-1m outside the hole mouth for inflation (grouting); the screen pipe is lowered throughout the coal seam section. If the screen pipe cannot be lowered throughout the whole process due to hole collapse, it is necessary to follow the hole at least once; if the screen pipe cannot be lowered throughout the whole process after following the hole, it is necessary to ensure that the screen pipe enters at least 4m inside the coal-rock boundary line; if the length of coal penetration is less than 5m, the hole screen pipe is sealed. Enter the coal seam not less than 2m; the 50mm diameter pipe column (grouting type B column) is fixed at a distance of 2m from the hole mouth, the 16mm diameter bag grouting pipe is black, and the 16mm diameter rock section grouting is white. Both leak 1-2m and can be connected with quick connectors; it is strictly forbidden to remove the hole mouth tee and negative pressure continuous extraction pipeline before sealing the hole; the hole mouth is strictly prohibited from being exposed before the lower sealing hole pipe, and the air duct cloth can be used to wrap the sealed hole mouth. In case of hole collapse or other reasons that fail to seal to the designed position, immediately withdraw the sealing pipeline and carry out hole sweeping operations.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fully enclosed water-sealed anti-spout hole device, comprising: A drilling rig (1), characterized in that: one end of the drilling rig (1) is connected to an orifice three-proof device (3), and the other end of the orifice three-proof device (3) is sleeved with a sleeve (2), one side of the outer wall of the orifice three-proof device (3) is connected to a first corrugated steel pipe (4), and the other side of the outer wall of the orifice three-proof device (3) is connected to a first connecting hose (5), the other end of the first corrugated steel pipe (4) is flange-connected to a vertical gas-water separation device (6), and the top of the vertical gas-water separation device (6) is connected to a transparent connecting hose (7), the other end of the transparent connecting hose (7) is flange-connected to a horizontal blowout prevention box (9), and the outer wall of the transparent connecting hose (7) is connected to the other end of the first connecting hose (5), and the top of the horizontal blowout prevention box (9) is connected to a second corrugated steel pipe (4) through the transparent connecting hose (7). A corrugated steel pipe (11), a second connecting hose (8) is installed on one side of the outer wall of the vertical gas-water separation device (6), and the end of the second connecting hose (8) is connected to a metering coal pool (10), the other end of the drilling rig (1) is connected to an operating table (16), and an extraction hose (12) is installed at the input end of the operating table (16), the other end of the extraction hose (12) is connected to the vertical gas-water separation device (6), the access end of the operating table (16) is connected to an air supply pipeline (14) through a pipeline, and the access end of the operating table (16) is connected to a second water supply pipeline (15) through a pipeline, the access end of the orifice three-proof device (3) is installed with a first water supply pipeline (13) through a pipeline, and the first water supply pipeline (13) is connected to the vertical gas-water separation device (6) through a pipeline, and the said.

2. A fully enclosed water-sealed anti-spout hole device according to claim 1, characterized in that: The inner cavity of the orifice three-proof device (3) is provided with a baffle disk, a sealing gasket is provided on the inner side, and two sealing gaskets are provided on the outer side.

3. A fully enclosed water-sealed anti-spout hole device according to claim 1, characterized in that: The transparent connecting hose (7) and the horizontal blowout prevention box (9) are connected in a U-shape, and the highest point of the transparent connecting hose (7) is hung on the top plate of the tunnel.

4. A fully enclosed water-sealed anti-spout hole device according to claim 1, characterized in that: The side opposite to the lower water outlet of the vertical gas-water separation device (6) is directly connected to the water supply pipe.

5. A fully enclosed water-sealed anti-spout hole device according to claim 1, characterized in that: A drain elbow is provided at the bottom of the horizontal blowout prevention box (9).

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