Earth-boring bit having an improved hard-faced tooth structure

Details Earth-boring bit having an improved hard-faced tooth structure Earth-boring bit having an improved hard-faced tooth structure

1993-06-14

1994-10-04

Neuder, William P.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175430, E21B 1050

Patent

active

053517717

ABSTRACT:
An earth-boring bit has a bit body and at least one cutter rotatably secured to the bit body. The cutter has a plurality of teeth formed integrally thereon and arranged in circumferential rows. Each of the teeth includes an outer end, an outer end, a pair of flanks and a crest substantially transversely connecting the ends and flanks. The crests of the at least one of the plurality of teeth has an inverted radius formed therein at at least one intersection of the ends and crest. A wear-resistant material is applied over at least the crest and a portion of at least the ends and flanks of the at least one of the plurality of teeth, wherein the thickness of the wear-resistant material over the inverted radius is substantially greater than elsewhere on the tooth.

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