Fremgangsmåte og anordning for sentrering av et rör ned i en brönn

A system for centralizing casing pipe in a wellbore includes lateral pistons in the side wall of the casing string which are movable by force applied to their inner end, from a retracted position within the maximum exterior profile of the casing pipe string to a predetermined extended position which...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	WILSON, DENNIS R, MORAN, LARRY K
Format:	Patent
Sprache:	nor
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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