METHOD AND APPARATUS FOR INSERTING A TUBULAR STRING INTO A WELL

A valve to act as a barrier to fluid movement in a tubular is provided. A flapper in the valve may be opened by application of a selected pressure differential across the flapper. The flapper opens to allow a cylinder to shift and cover the open flapper. A method of placing a tubular string within a...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	Robert C. HENSCHEL JR, Shane W. PFAFF, Thomas G. HILL
Format:	Patent
Sprache:	eng ; spa
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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