Cutting elements for rotary drill bits

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

1994-07-01

1995-06-06

Buiz, Michael Powell

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

E21B 1046

Patent

active

054214254

ABSTRACT:
A cutting element for a rotary drill bit comprises a thin cutting table of polycrystalline diamond having a front cutting face and a rear surface bonded to a tungsten carbide substrate. The substrate incorporates one or more thin barrier layers which extend at least partly through the thickness of the substrate in a direction transverse to its front surface. Each barrier layer is formed of a material, such as nickel, which is more ductile than the material of the substrate, but is metallurgically compatible with it.

REFERENCES:
patent: 4877096 (1989-10-01), Tibbitts
patent: 5060739 (1991-10-01), Griffin
patent: 5355969 (1994-10-01), Hardy et al.

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