Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Patent
1998-12-22
2000-10-24
Neuder, William
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
175430, E21B 1046
Patent
active
061352195
ABSTRACT:
An earth-boring bit has a bit body and at least one cantilevered bearing shaft depending inwardly and downwardly from the bit body. A cutter is mounted for rotation on the bearing shaft and includes a plurality of cutting elements. At least one of the cutting elements has a generally cylindrical body formed of hard metal with a convex cutting end. A plurality of recesses extend longitudinally from the apex to the junction. The recesses are shallow grooves symmetrically spaced about the axis. A layer of super-hard material is formed on the cutting end of the body and overlays the recesses formed thereon.
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Neuder William
Rowald Kent A.
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