Optimized central PDC cutter and method
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United States of America Patent
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Nov 30, 2010
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N/A
app pub date -
Jul 18, 2008
filing date -
Jul 18, 2008
priority date (Note) -
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Abstract
A drill bit, insert and method useful for subterranean drilling, or forming boreholes in subterranean formations is provided. More particularly, a more efficient cutting structure and method is provided in the central portion of a PDC drill bit. The present invention provides a drill bit, insert and method having a central cutting portion with a more normalized angle of attack. The drill bit of the present invention provides for various attack angles much closer to the optimum side rake.
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