Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2009-02-17
2011-11-22
Neuder, William P (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S432000
Reexamination Certificate
active
08061457
ABSTRACT:
An impact tool that includes an impact body made from a superhard material bonded to a substrate at a non-planer interface, the impact body having a pointed geometry that includes a substantially frustoconical portion between an apex and a base end, the substantially frustoconical portion including a tapered side wall with at least two different, contiguous slopes that together form an interior included angle which is greater than 135 degrees, and with the thickness of the impact body, as measured from the apex to the non-planar interface, being greater than the thickness of the substrate.
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NPL—International search report for PCT/US2007/075670, mailed Nov. 17, 2008.
Crockett Ronald B.
Hall David R.
Brinks Hofer Gilson & Lione
Neuder William P
Schlumberger Technology Corporation
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