Elements faced with superhard materials

Details Elements faced with superhard materials Elements faced with superhard materials

1995-06-16

1997-04-22

Dang, Hoang C.

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

51293, E21B 1046

Patent

active

056222335

ABSTRACT:
A preform element, for example for use as a cutter in a rotary drill bit, includes a facing table of polycrystalline diamond bonded to a substrate of tungsten carbide. The rear surface of the facing table is integrally formed with a plurality of protuberances which project into the substrate and are spaced apart irregularly across the rear surface of the facing table. The protuberances may differ in cross-sectional shape and/or size, and the distribution of the different sizes and/or shapes may also be irregular. The protuberances may also project into the substrate to irregularly varying depths.

REFERENCES:
patent: 4784023 (1988-11-01), Dennis
patent: 5120327 (1992-06-01), Dennis

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