Lifting and hanging type oil drainage device

The utility model relates to a subsurface tool for oil well operation in oilfield, in particular to a lift type oil drain device, which comprises an upper joint, an oil drain tube, a central tube, an oil drain pin, and a lower joint that are connected in sequence, the upper joint and the oil drain t...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	GONG JIAYONG, CHEN MING, ZHOU JIANSHENG, HAN ANPING, DONG KEWU, SUN WEIMIN, GONG JIARONG, WANG DEREN, GONG YANGCHENG, LIU QINGSONG, BI SHENG, LUO JINGQUAN, PENG SEN, QIU KUNTAI, DAI DASHAN, QU YUCHENG, QIU JIE, QU YUBIN, LI JIANGHAO, WU ZUDE, DENG YANHUI
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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