Large-drift-diameter secondary hole sealing device for gas extraction drill hole

• Main Authors: CHEN YONG, KANG JIANNING, LI XIAOMING, HU LIANGZHAO, LI YONGYUAN, MIAO FATIAN, MA YANYANG, ZHOU WENBIN, YANG TENG, FENG RENJUN, WANG YILONG, WU JIAOKUN, SHI MINGFU, SUN FULONG, ZHAO QINGQUAN, MA HONGYU, LI WEIDONG, LI ZHENGNAN
• Format: Patent
• Language: Chinese; English
• Published: 19.11.2021
• 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 utility model relates to a large-drift-diameter secondary hole sealing device for a gas extraction drill hole, and belongs to the technical field of gas control engineering. Comprising two hole sealing units and a hole sealing pipe, the end, arranged in a drill hole, of the hole sealing pipe is...