Circulating screwing-on and screwing-off device at top of tubular column

The utility model discloses a pipe column top circulation screwing-on and screwing-off device which is arranged at the upper end of a mast in a sliding mode and comprises a simple faucet and a hydraulic power tong. The upper end of the simple water faucet is connected with a water hose, and the hydr...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	JIAO JIAN, CAO LIMING, LIU YAN, YING JIE, TANG XINGTI, ZHAO GUOQIANG
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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