Operation of casing valves system for selective well stimulation and control
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United States of America Patent
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Nov 25, 2014
Grant Date -
Mar 17, 2011
app pub date -
Nov 24, 2010
filing date -
Jan 25, 2007
priority date (Note) -
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Abstract
Casing valves for selective well stimulation and control. A well system includes at least one valve interconnected in a casing string operable via at least one line external to the casing string to selectively control fluid flow between an exterior and interior of the casing string, and the casing string, valve and line being cemented in a wellbore. A method of selectively stimulating a subterranean formation includes: positioning a casing string in a wellbore, the casing string including spaced apart valves operable via a line to selectively control fluid flow between an interior and exterior of the casing string; and for each of multiple intervals of the formation in sequence, stimulating the interval by opening a corresponding one of the valves, closing the remainder of the valves, and flowing a stimulation fluid from the casing string into the interval.
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