Pressing and pumping integrated gas concentration device under ultrasonic secondary impact and concentration method

• Main Authors: REN BAORUI, LI FENG, JING YADONG, WANG BO, LIU HANWU, YAN ZHENGXU
• Format: Patent
• Language: Chinese; English
• Published: 06.01.2023
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS

The invention belongs to the technical field of coal mine drilling gas extraction strengthening, and particularly relates to a pressure extraction integrated gas concentration device under ultrasonic secondary impact and a concentration method.The device comprises a liquid CO2 fracturing system, a concentration extraction system and an ultrasonic secondary impact system which are located in an anti-reflection drilling hole, and the anti-reflection drilling hole is located in a coal seam; a compensation space is arranged between the coal seam top plate and the anti-reflection drill hole, the length of the compensation space is larger than the depth of the anti-reflection drill hole, and a coal seam bottom plate is arranged at the bottom of the anti-reflection drill hole. And meanwhile, the designed novel flying stopper can effectively reduce the phenomenon of pipe flying generated by axial movement of the extraction pipe and the fracturing pipe under high-pressure impact, and the device is simple and convenien