Expansion type blanking plug operating under pressure

The invention belongs to the technical field of oil gas equipment, and discloses an under-pressure operation expansion type blanking plug which comprises a positioner and a blanking plug body, the positioner is installed in an oil pipe, and a horn mouth structure with the diameter gradually reduced...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	WANG YUECHUN, LIU YUHANG, LIU XIAODONG, LUO XIAOLIN, YANG LEI, YI DEZHENG, LUO YINGSHENG, ZHANG YONG, JIANG YUAN, QI WENLONG, DU CHUNSHA, LIU YANYAN, LAI NING, LUO WEI, LI MENGXUE
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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