Directional sidetrack well drilling system
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United States of America Patent
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-
Apr 30, 2013
Grant Date -
Sep 2, 2010
app pub date -
Feb 18, 2010
filing date -
Feb 27, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
Drilling a sidetrack wellbore out of the side of an existing wellbore utilizing a drillable billet having a path formed in the billet to lead a bi-centered drillbit to kick-out from the wellbore and form a sidetrack wellbore. The bi-centered bit is arranged for the lands of the pilot section to follow the path of the billet while the wings of the ream out a portion of the billet and also ream out the earth to form the full dimension sidetrack wellbore. The bi-centered bit is used to drill the sidetrack wellbore to the target zone so that the entire drilling process extends from the existing wellbore to the target zone without a mandatory withdrawal of the drillstring from the wellbore.
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