Blowout prevention and sealing device and sealing method for drilling holes in high gas and strong coal injection seam
A technology of extraction drilling and sealing device, which is applied in the directions of sealing/isolation, earthwork drilling, wellbore/well parts, etc. The effect of quick sealing and simple operation of the device
Active Publication Date: 2019-01-01
HUAINAN MINING IND GRP
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Problems solved by technology
Due to the high cost of the commercially available special hole bottom suspension device (one unit price is 50-200 yuan), and the use effect is poor, especially in the use of upward drilling at a large inclination angle, it often fails to hang. Therefore, using this suspension device, Not only is the price low, but it is also suitable for hanging and fixing at various angles, which effectively solves the problem of hanging and fixing flexible flower tubes
Method used
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Embodiment Construction
[0015] Such as figure 1 As shown, in the drilling process of high gas and strong coal injection seam drainage, the problem of gas accumulation caused by hole blocking after pulling out must be solved first, so as to prevent the occurrence of accidents caused by delayed injection holes. Therefore, a 1-inch flexible flower tube is used 1 (Polyethylene) is lowered into the bottom of the hole through the power head of the drilling rig, the holder, and the blowout prevention device, and the drill hole is conducted, which solves the problem of gas accumulation caused by the blockage in the hole after the drill is pulled out; and, in order to prevent the process of lowering the pipe A large piece of coal and rock powder in the middle hole passes through the drill holder and hurts people. A protective device is installed in the drill holder, which can effectively avoid the above accidents.
[0016] After the above-mentioned 1-inch flexible flower tube (polyethylene hose) is lowered in...
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The invention discloses a high gas intensified spraying coal seam extraction drilling blowout preventing and hole sealing device and a hole sealing method thereof. The device comprises a flexible floral tube and a hole sealing tube, wherein the flexible floral tube is sheathed inside the hole sealing tube, the top end of the flexible floral tube is flushed with the top end of the hole sealing tube, the bottom end of the flexible floral tube extends outward, an anchor-shaped suspension device is fixedly arranged at the bottom end of the flexible floral tube, the suspension device comprises at least two strands of steel ropes, at least two strands of steel ropes are crossed, penetrate through the flexible floral tube and bend upward, and the two ends of each strand of steel rope are in a slit state respectively; and a grouting tube used for pouring cement grout is arranged at the outer side of the hole sealing tube. The device disclosed by the invention has the advantages that delay of hole spraying and a wounding accident in a down tube hole sealing process are completely eradicated, operation safety is improved, and drilling extraction efficiency also can be improved; a blowout preventing device does not need to be removed, a dip angle of a drilling machine does not need to be adjusted, and a hole can be quickly sealed; and the device disclosed by the invention is easy to operate, low in cost and beneficial to energy conservation and effect enhancement.
Description
technical field [0001] The invention relates to a coal mine with one connection and three defenses, and belongs to the field of gas control technology and equipment in the underground area of the coal mine, and in particular relates to the drilling and sealing technology for the underground drainage of the coal mine. Background technique [0002] During the process of drilling and solidifying the borehole in the underground high-gas coal seam drainage, the borehole is blocked and the gas is accumulated due to the collapse of the borehole, water discharge and other reasons. Therefore, it is necessary to install the blowout preventer at the orifice first, and then remove the blowout preventer after pulling out the drill, and then the operator stands on the side of the orifice to lower the pipe to fix the hole and carry out the subsequent hole sealing operation. Hole accidents may cause the coal and rock powder in the hole to be sprayed out together with the casing in the low...
Claims
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IPC IPC(8): E21B33/13
CPCE21B33/13
Inventor 黄学矿曾令红
Owner HUAINAN MINING IND GRP