Rotary drill bits including at least one substantially helically extending feature and methods of operation
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United States of America Patent
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Apr 22, 2008
Grant Date -
Mar 9, 2006
app pub date -
Sep 9, 2004
filing date -
Sep 9, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A rotary drill bit is disclosed, including at least one cutting element affixed thereto and configured to form a distinct borehole surface in response to drilling a subterranean formation. At least one substantially helically extending feature associated with the at least one cutting element may be formed upon the leading end of the rotary drill bit. Alternatively, a rotary drill bit may include a plurality of substantially helically extending features. Methods of operating a rotary drill bit are also disclosed. Specifically, a subterranean formation may be drilled with a rotary drill bit to form an on-center bottomhole pattern, which may be at least partially contacted by at least one substantially helically extending feature of the rotary drill bit. Alternatively, a subterranean formation may be contacted with at least one substantially helically extending feature of the rotary drill bit. A method of designing a rotary drill bit is disclosed.
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