Method and device for conducting hydraulic jet self-propelled drilling to improve gas permeability of coal seam
A hydraulic jet and self-propelled technology, which is applied in the direction of drilling with liquid/gas jet, can solve the problems of low efficiency, heavy workload, and low gas extraction volume in low-permeability coal seams, and achieve a safe working environment and convenient operation , the effect of simple structure
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[0022] The structure and use method of the present invention will be described in detail below in conjunction with the drawings:
[0023] See figure 1 The main equipment of the hydraulic jet self-advancing tree drilling device proposed in the present invention is: water tank 1, high pressure pump 2, high pressure energy storage tank 3, high pressure hose telescopic supply device 4, drilling rig 5, orienter 6, High-pressure hose 9, steering gear 10, drill rod 8, self-advancing drill bit 11, etc. are connected as follows:
[0024] The water tank 1, the high-pressure pump 2, the high-pressure storage tank 3, and the high-pressure hose 9 are connected in sequence, and the high-pressure hose 9 is installed on the high-pressure hose telescopic supply device 4.
[0025] The orienter 6 is a regular N-sided cylindrical body with a through hole in the center and N gears formed on N sides. The front end of the orienter is connected to the drill rod 8, and the rear end is fixed on the drill 5 by...
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