Underground ultrasonic yield-increasing pumping device for coalseam gas
A coalbed methane well and ultrasonic technology, which is applied in the development of fluids, earthwork drilling, wellbore/well components, etc., can solve the problems of high production and maintenance costs, large energy loss, and many moving parts, so as to improve the drainage efficiency and reduce the The cost of gas production and the effect of a wide range of applications
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[0028] Below, in conjunction with accompanying drawing and embodiment, the present invention is described in detail; figure 1 It is a schematic diagram of the structure of a system device in the prior art that adopts the "liquid drainage and gas recovery" method and uses the ground pumping unit to drive the oil well pump. figure 2 It is a structural schematic diagram of a device supporting the ultrasonic stimulation and atomization extraction process of coalbed methane underground in the present invention. from figure 1 It can be seen that the surface pumping unit 1 drives the oil pump 5 through the sucker rod 2, and the piston of the oil pump 5 reciprocates up and down to continuously pump out the bottom water to reduce the height of the liquid column and make the pressure at the perforation position Above the liquid column pressure, a certain "production pressure difference" is formed; in this way, the desorbed gas of the coal seam flows out from the perforation position o...
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