DOWNHOLE TOOL WITH LIQUID SPRING

A flow tester valve apparatus includes a housing (62) having a flow passage (140) disposed therethrough, with a flow valve (136) disposed therein for opening and closing the flow passage. A power mandrel (148) is disposed in the housing and includes a power piston (156). The power mandrel is operati...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	BARRINGTON, BURCHUS QUINTON
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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