Pressure activated switch valve

A valve (60) operatively interconnectable to the first and second pressure regions of a subterranean well. The valve comprises a member (92) having first and second surface areas formed thereon. The first surface area is in fluid communication with the first pressure region, and the second surface a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	IMRE I. GAZDA
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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Beschreibung
Zusammenfassung:	A valve (60) operatively interconnectable to the first and second pressure regions of a subterranean well. The valve comprises a member (92) having first and second surface areas formed thereon. The first surface area is in fluid communication with the first pressure region, and the second surface area is in fluid communication with the second pressure region. The member (92) is displaceable from a first position to a second position when fluid pressure in the first pressure region exceeds fluid pressure in the second region by a predetermined amount. The valve further comprises a chamber (66), the chamber (66) being isolated from the second pressure region when the member (92) is in the first position, and the chamber (66) being in fluid communication with the second pressure region when the member (92) is in the second position.