DOWNHOLE SAFETY VALVE FOR CENTRAL CIRCULATION COMPLETION SYSTEM

A downhole safety valve for a central circulation completion system (12) which comprises an inner tubular member (26) that extends through an outer tubular member (28) and a production bore which is defined between the inner and outer tubular members. The downhole safety valve (10) comprises a gener...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	SKEELS, HAROLD, B
Format:	Patent
Sprache:	eng ; fre
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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