Well mouth temporary closing plug

The invention discloses a well mouth temporary closing plug. The well mouth temporary closing plug comprises a central pipe, a liquid cylinder, a piston, a slip and an expansion capsule, wherein a thick-wall pipe with a through hole inside is adopted by the central pipe, the upper part and the lower...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ZHANG LONG, WANG LIN, XIE TONGCHUAN, LIU SONG, WU LIPING, BAI SHI, YANG XINGQI, LIU CHENGLIANG, LIU LIN, TANG HONGBAO, ZHANG XINZHONG, PING ENSHUN
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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