Cutting elements for rotary drill bits

Details Cutting elements for rotary drill bits Cutting elements for rotary drill bits

1989-04-04

1991-02-26

Group, Karl

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51293, B24B 100

Patent

active

049958879

ABSTRACT:
A cutting element for a rotary drill bit comprises a layer of polycrystalline diamond material having a front face and a rear face, a backing layer of less hard material bonded to the rear face of the diamond layer, and a front layer of less hard material bonded to the front face of the diamond layer and extending across at least the major part thereof. The front layer is thinner than the backing layer, at least in the vicinity of the cutting edge of the cutting element.

REFERENCES:
patent: 4219339 (1980-08-01), Wilson
patent: 4225322 (1980-09-01), Kremeyer
patent: 4255165 (1981-03-01), Dennis et al.
patent: 4259090 (1981-03-01), Bovenkerk
patent: 4505342 (1985-03-01), Barr et al.
patent: 4539018 (1985-09-01), Whanger et al.
patent: 4694918 (1987-09-01), Hall

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