A hydraulically controlled packer that may be set and unset a plurality of times

A downhole well apparatus comprises a setting piston (70) movably disposed within the apparatus, such that a slips (71) and seal (72) arrangement may be set by the setting piston(70) in response to hydraulic pressure. An unlocking/unsetting piston (84) is actuated in response to a source of unlockin...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ROGER DALE LACY, JOHN HUGHES, BILLY R NEWMAN
Format:	Patent
Sprache:	eng
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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