Boring or penetrating the earth – Bit or bit element – Impact or percussion type
Patent
1996-03-06
1998-04-28
Bagnell, David J.
Boring or penetrating the earth
Bit or bit element
Impact or percussion type
175432, 407118, E21B 1056
Patent
active
057433461
ABSTRACT:
An abrasive cutting element comprised of an abrasive cutting layer and a metal substrate wherein the interface therebetween has a tangential chamfer, the plane of which forms an angle of about 5.degree. to about 85.degree. with the plane of the surface of the cylindrical part of the metal substrate. The abrasive cutting layer is preferably diamond or cubic boron nitride and the metal substrate is preferably tungsten carbide.
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Flood Gary Martin
Johnson David Mark
Williams Bradley Earl
Bagnell David J.
General Electric Company
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