High energy cutting elements and bits incorporating the same

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Reexamination Certificate

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Details

C175S426000

Reexamination Certificate

active

07451838

ABSTRACT:
High energy sheer cutting elements and bits incorporating the same are provided. The cutting elements have at least a portion of their cutting layers which will be exposed to high temperatures during drilling formed from a PCBN material capable of operating at temperatures of at least 1000° C.

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International Search Report for Application No. GB0612464.8 dated Sep. 14, 2006.
Bailey, M.W., et al., “The increasing importance of PCD/diamond/CVDD and PCBN/cBN tooling in the automotive industry”—Metalworking,Industrial Diamond Review; Jan. 2002; pp. 53-60; published by the Industrial Diamond Association of America.
Halpin, et al.; “The performance of PCBN in hard turning”—PCBN tooling,Industrial Diamond Review; Apr. 2005; pp. 52-60.

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