Casing valves system for selective well stimulation and control
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United States of America Patent
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Oct 11, 2016
Grant Date -
Apr 3, 2014
app pub date -
Oct 11, 2013
filing date -
Jan 25, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A valve for use in a tubular string in a subterranean well includes a sleeve having first and second opposite ends, the sleeve being displaceable between open and closed positions to thereby selectively permit and prevent flow through a sidewall of a housing assembly, and a first and second pistons at the respective first and second ends of the sleeve. Pressure differentials applied to the first and second pistons are operative to displace the sleeve between its open and closed positions.
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