Stress-reduced superhard cutting element

Details Stress-reduced superhard cutting element Stress-reduced superhard cutting element

1994-06-17

1996-02-20

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

175433, 175434, 761082, E21B 1046

Patent

active

054921880

ABSTRACT:
A cutting element suitable for incorporation in a drill bit used for earth drilling is disclosed which comprises an abrasive layer of superhard material formed on a substrate support, the substrate and/or the abrasive layer being structurally modified to reduce and/or redistribute detrimental tensile stresses which occur at the periphery of the abrasive layer and at or near the interface between the abrasive layer and the substrate, and within the body of the substrate. The modified cutting element structure reduces the occurrence of fracturing and cutter degradation.

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patent: 4702649 (1987-10-01), Komanduri
patent: 4919220 (1990-04-01), Fuller et al.
patent: 5007207 (1991-04-01), Phaal
patent: 5103948 (1993-03-01), Noggle
patent: 5120327 (1992-06-01), Dennis
patent: 5135061 (1992-08-01), Newton, Jr.
patent: 5159857 (1992-11-01), Jurewicz
patent: 5217081 (1993-06-01), Waldenstrom et al.
patent: 5244712 (1993-09-01), Eden
patent: 5355969 (1994-10-01), Hardy et al.

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