Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Reexamination Certificate
2006-09-05
2010-06-29
Neuder, William P (Department: 3676)
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
C175S412000, C175S426000
Reexamination Certificate
active
07743855
ABSTRACT:
A drill bit includes a cutter element having a tapered and faceted side surface extending to a peak, and a polygonal wear face that slopes from the peak toward the cutter element base. The cutter element is mounted in a cone cutter of a rolling cone drill bit and, in certain embodiments, is positioned such that, when the cutter element is in a position farthest from the bit axis, the wear face generally faces and is parallel to the borehole sidewall and the peak engages the borehole bottom.
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Combined Search and Examination Report for Appl. No. GB0717107.7 dated Jan. 8, 2008; (7 p.).
Conley & Rose, P.C.
Harcourt Brad
Neuder William P
Smith International Inc.
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