Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Patent
1994-10-17
1996-03-19
Novosad, Stephen J.
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
175434, 175427, 384 95, 3849071, E21B 1046, E21B 1056, F16C 3324
Patent
active
054996880
ABSTRACT:
The present disclosure sets forth various forms of inserts for operating as elements in bearing drill bits and similar devices. A single insert is formed with an external side face of cylindrical construction. One or more strips of hardened materials such as diamond or other hard material are provided along the side face. At the end face, the insert incorporates exposed tungsten carbide, diamond or other hard material. A PDC layer is optionally placed over the end face. The PDC layer has the form of a covering terminating at a radius of curvature.
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Dennis Tool Company
Novosad Stephen J.
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