Non-planar interfaces for cutting elements

Details Non-planar interfaces for cutting elements Non-planar interfaces for cutting elements

1997-12-05

2000-03-28

Bagnell, David

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

175428, 175426, E21B 1046

Patent

active

060418753

ABSTRACT:
This invention is directed to cutting elements having an ultra hard cutting layer such as polycrystalline diamond or polycrystalline cubic boron nitride bonded on a cemented carbide substrate. The interface between the substrate and the cutting layer of each such cutting element is non-planar. The non-planar interface is designed to enhance the operating life of the cutting element by reducing chipping, spalling, partial fracturing, cracking and/or exfoliation of the ultra hard cutting layer, and by reducing the risk of delamination of the cutting layer from the substrate.

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