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

1996-08-02

1998-08-11

Bagnell, David J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

761084, E21B 1016, E21B 1050

Patent

active

057914230

ABSTRACT:
An earth-boring bit has a bit body and at least one cutter rotatably secured to the bit body. The cutter includes a plurality of teeth formed integrally with the cutter and arranged in circumferential rows. Each tooth has inner and outer ends, leading and trailing flanks, and a crest transversely connecting the ends and flanks. A thickness of wear-resistant material is applied over the crest and at least a portion of the ends and flanks of the tooth. An extending layer of wear-resistant material is applied at the intersection of the leading flank and the outer end to provide twice the hard-facing thickness and increased wear-resistance in that area of the tooth that is subjected to the greatest wear.

REFERENCES:
patent: 2660405 (1953-11-01), Scott et al.
patent: 3800891 (1974-04-01), White et al.
patent: 5131480 (1992-07-01), Lockstedt et al.
patent: 5445231 (1995-08-01), Scott et al.
patent: 5492186 (1996-02-01), Overstreet et al.
patent: 5579856 (1996-12-01), Bird

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