Downhole sequentially-firing casing perforating gun with electronically-actuated wireline release mechanism, and actuation circuit therefor
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United States of America Patent
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Sep 11, 2012
Grant Date -
Mar 24, 2011
app pub date -
Sep 23, 2009
filing date -
Sep 23, 2009
priority date (Note) -
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Abstract
A downhole release tool for use in conjunction with multiple select-fire perforating guns and a method for electronically actuating the release tool using either positive or negative control voltage. In a preferred embodiment, the release tool employs operating circuitry that allows actuation of the release tool by either a positive or a negative voltage at an absolute magnitude greater than the absolute magnitude of positive or negative voltages used to arm or fire the perforating guns.
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