Earth-boring bit with super-hard cutting elements

Details Earth-boring bit with super-hard cutting elements Earth-boring bit with super-hard cutting elements

1998-05-07

2000-08-08

Neuder, William

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

175434, E21B 1046

Patent

active

060987308

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 substantially recesses are formed on the cutting end of the body. The recesses are configured such that a line parallel to the longitudinal axis of the body may extend from any point of each of the recess without touching any other point on the same recess. This enables the cutting element body and the recess to be formed simultaneously by conventional powder metallurgical techniques. 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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