Blowout preventer for wellhead of oil well

The invention belongs to the technical field of well drilling packing equipment, and particularly relates to a blowout preventer used for an oil well mouth, the blowout preventer comprises a shell and a sealing assembly, a through hole is formed in the shell, the two ends of the through hole both pe...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ZHANG LISHENG, WANG LIJUN, MIN LINGBAO, CHEN XIANYIN
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
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