Orifice sealing device and method for drilling construction

The embodiment of the invention discloses an orifice sealing device and method for drilling construction, relates to the technical field of coal mine gas treatment, and can effectively improve the sealing effect of an orifice during drilling construction. The device comprises a body, a sealing cover...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	YE SHANGUO, WU LINZHI, WANG GUANGZHI, ZHANG YIMIN, HOU SIBIN, LUO CHUNHUI, MENG ZHANCHENG, WEN PENGPENG, WANG YANG, LI FANGFANG, WANG ZIMING, WEI FENGQING, YUE JINGLONG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	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
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