Ultra-long borehole coal seam gas pressure testing equipment and method

• Main Authors: WANG HUANCHEN, YANG CHENGTAO, LIANG YINQUAN, ZHANG JIAN, XIONG JUNJIE, WANG YIMIN, CHAI XIJUN, CHEN ZUGUO, LI LEYI, ZHAO KANG, FENG LIJIE, JIANG ZHIGANG, YANG ZHENGYU
• Format: Patent
• Language: Chinese; English
• Published: 24.11.2020
• 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

The invention belongs to the technical field of coal seam gas extraction, and in particular relates to ultra-long borehole coal seam gas pressure testing equipment and method. The ultra-long boreholecoal seam gas pressure testing equipment includes a pressure measurement drilling vehicle and a pipeline assembly device connected to the pressure measurement drilling vehicle; and the pressure measurement drilling vehicle includes a gas pressure sensor arranged at the forefront, an expansion air bag connected to the rear end of the gas pressure sensor, a pneumatic pump for inflating the expansionair bag, a walking device fixedly connected to the expansion air bag and the pneumatic pump, and a walking power device that drives the walking device to travel. According to the ultra-long boreholecoal seam gas pressure testing equipment and method disclosed by the invention, by connecting the gas pressure sensor with a pressure gauge, the gas pressure in the pressure measuring chamber can be monitored through the pressu