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

175425, E21B 1016

Patent

active

053517695

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 inner 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 a depression formed therein that extends from the outer end of the tooth to an intermediate point along the crest, a remainder of the crest defines a raised crest portion. 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 depression is substantially greater than elsewhere on the tooth.

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