Wellhead blowout preventer for high-risk well replacement

The utility model discloses a high risk well change wellhead blowout preventer which comprises a first sleeve, a second sleeve and a third sleeve and further comprises a third barrier, a second barrier and a first barrier, the bottom end of the second sleeve is connected with the top end of the thir...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	DONG DAQIANG, WEI DAWEI, ZHANG HONGDE, XIAO MENGCHU, WEN TAO, WEN XUEDONG, HOU RONGJUN, BAI PING, CAI YINGXIN, LIAO HANHAN, WANG YONG, CHEN CIRUI
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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