Drilling subsurface wellbores with cutting structures
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United States of America Patent
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Nov 30, 2010
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app pub date -
Apr 18, 2008
filing date -
Apr 20, 2007
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Abstract
A system for forming a wellbore includes a drill tubular. A drill bit is coupled to the drill tubular. One or more cutting structures are coupled to the drill tubular above the drill bit. The cutting structures remove at least a portion of formation that extends into the wellbore formed by the drill bit.
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