Cutter assemblies and cutting elements for rotary drill bits

Details Cutter assemblies and cutting elements for rotary drill bits Cutter assemblies and cutting elements for rotary drill bits

1993-10-05

1994-09-20

Bui, Thuy M.

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

175428, E21B 1046

Patent

active

053481097

ABSTRACT:
A cutter assembly for a rotary drill bit comprises a preform cutting element mounted on a carrier. The cutting element includes a thin cutting table of polycrystalline diamond, defining a front cutting face and a cutting edge bonded to a less hard substrate which is in turn bonded to the carrier. The substrate and/or the carrier comprises a first portion of high erosion resistance, formed for example from tungsten carbide, and a second portion of lower erosion resistance, formed for example from tungsten metal, which is located in the vicinity of the cutting edge of the cutting element so that, in use, the wear flat is mostly formed in the material of lower erosion resistance.

REFERENCES:
patent: 4987800 (1991-01-01), Gasan et al.
patent: 5135061 (1992-08-01), Newton, Jr.
patent: 5213171 (1993-05-01), Clench et al.

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