Dual-purpose hole sealing device for gas extraction and coal seam water injection and using method thereof
A coal seam water injection and gas drainage technology, which is applied in earthwork drilling, sealing/isolation, wellbore/well components, etc., can solve the problem of high cost of sealing holes, reduce the sealing effect of air leakage or water leakage channels, and grouting pressure Increase and other problems, to achieve the effect of low sealing cost, increase gas drainage volume or water injection effect
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[0031] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing and embodiment:
[0032] combine figure 1 and Figure 4, the double-purpose sealing device for gas drainage and coal seam water injection in this embodiment includes a drainage pipe / water injection pipe 2, a high elastic rubber pipe 7, an integrated elastic bag and a grouting pipe 13; the drainage pipe / water injection pipe Through the high-elastic rubber tube, the two ends of the high-elastic rubber tube are sealed and connected to the extraction pipe / water injection pipe through the outer locking pressure head 5 and the inner locking pressure head 6. A closed water-filled space 19 is formed between the rubber tubes. One end of the outer locking head extends into the water-filled space, and the other end stretches out of the water inlet pipe 3 and the drain pipe 4 of the outer locking head. There is a rotary switch 18 for water circulation, and the...
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