DEBRIS REMOVAL SYSTEM AND METHOD FOR PRESSURE CONTROLLED WELLBORE DRILLING AND INTERVENTION OPERATIONS
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United States of America Patent
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Issued Date -
Aug 18, 2011
app pub date -
Sep 22, 2010
filing date -
Feb 18, 2010
priority date (Note) -
Abandoned
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Abstract
A wellbore debris screening system used with controlled annulus pressure wellbore intervention and drilling operations includes a wellbore annulus seal configured to pressure isolate an annular space between a conduit inserted into the wellbore and the wellbore wall. A first screening device is coupled to an output of the annulus seal. second screening device is coupled to the output of the annulus seal. Valves are provided that are operable to selectively divert flow out of the annulus to the first and to the second screening sections.
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