UNDERBALANCED DRILL STRING DEPLOYMENT VALVE METHOD AND APPARATUS

Apparatus and methods are disclosed for a deployment valve used with an underbalanced drilling system to enhance the advantages of underbalanced drilling. The underbalanced drilling system may typically comprise elements such as a rotating blow out preventer and drilling recovery system. The deploym...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	HOSIE, DAVID G
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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