Novel power tong expansion bracket device

The utility model relates to a novel expansion bracket device for power tongs. According to the technical scheme, the telescopic device comprises a first-stage telescopic frame, a second-stage telescopic frame, a third-stage telescopic frame and a telescopic oil cylinder, the bottom of the first-sta...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	XU JIANYE, YUAN FEI, ZHAO HUA, WANG HE, ZHAO LIWEI, YU NINGWEN
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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