Pressure responsive downhole tool having a selectively activatable pressure relief valve and related methods
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United States of America Patent
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Dec 19, 2017
Grant Date -
Sep 3, 2015
app pub date -
Dec 27, 2012
filing date -
Dec 27, 2012
priority date (Note) -
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Abstract
A pressure responsive downhole tool comprises a power piston pressure relief valve that is selectively activated and deactivated to allow pressure-related operations to be conducted. The pressure relief valve will not open until the power piston is activated, which also requires the operating element (ball valve, for example) to be opened, thereby avoided situations in which the ball valve is inadvertently placed in the Lock Open position.
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