Orifice device for non-hoisting drilling water pressure test and using method thereof

The invention discloses an orifice device for a non-hoisting drilling water pressure test and a using method thereof. The device comprises a conversion joint and a body. The upper part of the conversion joint is provided with a female joint, and the lower part of the conversion joint is provided wit...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	GAO GUOYUN, SONG YANCHAO, YU CHANGFENG, REN HUIDA, GU KOUQUAN, LI PENGPENG, CAO XIAOWEI, LI XIAOHUI, WEI CHANGQING, GONG YAOCHONG
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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