PREVENTER

FIELD: oil production, particularly to seal well head during oil and gas well drilling. ^ SUBSTANCE: preventer comprises body with central axial channel and upper and lower sealing members with lock chamber arranged in-between. Each sealing member comprises upper and lower hydraulic drives correspon...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	MIKHEEV NIKOLAJ ALEKSANDROVICH
Format:	Patent
Sprache:	eng ; rus
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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