Displaceable plug in a tool string filter
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United States of America Patent
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Oct 4, 2011
Grant Date -
Sep 23, 2010
app pub date -
Mar 17, 2009
filing date -
Mar 17, 2009
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Abstract
A filter for a drill string comprises a perforated receptacle having an upper end and a lower end. The upper end of the filter comprises a drilling mud intake, and the lower end of the filter comprises an opening. A displaceable plug is seated on the opening at the lower end.
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