Temporary plugging tool for wellhead of oil and gas well

The invention discloses a temporary plugging tool for an oil-gas well mouth, and belongs to the field of oil-gas well development. Comprising a mandrel, a sealing piston and a screw, the mandrel is sleeved with an elastic sealing piece, the contact face of the mandrel and the elastic sealing piece i...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	GU LIANGYU, HU XUGUANG, YANG NING, LI HONGBING, SONG LAIYANG, LIU GUIYI, LUO LIN, ZENG GUOXI, MENG XINGPENG, HU GUANGHUI
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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