Wellbore cleaning method and apparatus
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United States of America Patent
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Sep 30, 2014
Grant Date -
Aug 29, 2013
app pub date -
Apr 1, 2013
filing date -
Jul 2, 2005
priority date (Note) -
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Abstract
A method of drilling and cleaning a wellbore includes providing a drill string having a drill bit and a cleaning tool with selectively activatable cleaning members; drilling a wellbore using the drill bit while maintaining the cleaning members in a deactivated position; and pulling the drill string from the wellbore with the cleaning members in an activated position, to thereby clean the wellbore. A corresponding cleaning tool includes a body having a bore running therethrough, a sleeve located within the bore, the sleeve including a ball seat and the sleeve being biased in a first direction, and a plurality of selectively activatable cleaning members mounted for repeated movement relative to the body between activated and deactivated positions.
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