Downhole deployment valves
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United States of America Patent
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-
Jul 29, 2014
Grant Date -
Dec 5, 2013
app pub date -
Aug 6, 2013
filing date -
Apr 4, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Methods and apparatus enable reliable and improved isolation between two portions of a bore extending through a casing string disposed in a borehole. A downhole deployment valve (DDV) may provide the isolation utilizing a valve member, such as a flapper, that is disposed in a housing of the DDV and is designed to close against a seat within the housing. The DDV includes an operating mechanism for opening/closing the DDV. In use, pressure in one portion of a well that is in fluid communication with a well surface may be bled off and open at well surface while maintaining pressure in another portion of the casing string beyond the DDV.
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