Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2007-12-17
2010-10-19
Neuder, William P (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S434000
Reexamination Certificate
active
07814998
ABSTRACT:
A cutting element for use in drilling subterranean formations. The cutting element includes a superabrasive table mounted to a supporting substrate. The superabrasive table includes a two-dimensional cutting face having a cutting edge along at least a portion of its periphery, and a surface comprising a chamfer extending forwardly and inwardly from proximate a peripheral cutting edge at a first acute angle of orientation of greater than about 45° with respect to the longitudinal axis of the cutting element, and to no greater than a selected depth. The chamfer may be arcuate or planar, and of a dimension sufficient to ensure that a wear flat generated during use of the cutting element remains outside the inner boundary of the chamfer within the chamfer envelope, and small enough to maintain aggressive cutting characteristics for the cutter. Drill bits and drilling tools bearing the cutting elements are also disclosed.
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PCT International Search Report for PCT/US2007/025762, mailed Mar. 20, 2008.
George Mathews
Lyons Nicholas J.
McClellan Richard J.
Pastusek Paul E.
Patel Suresh G.
Baker Hughes Incorporated
Neuder William P
TraskBritt
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