Cutting teeth for rolling cutter drill bit

Details Cutting teeth for rolling cutter drill bit Cutting teeth for rolling cutter drill bit

1980-09-10

1983-02-08

Pate, III, William F.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175410, 51307, E21B 1008, E21B 1046

Patent

active

043724043

ABSTRACT:
Cutting teeth for rolling cutter bits, including cutter inserts, cutter teeth formed in place, or formed separately and welded in place, etc., are formed by powder metallurgy as a densified powder metallurgical composite of at least two varying phases, said composite having a substantially continuous mechanical property gradient therethrough. One of said phases is preferably a refractory compound and another phase is a binder metal or alloy. The gradient is from one mixture of said phases in one region having hardness or wear resistant properties to another mixture of said phases in another region having toughness properties.

REFERENCES:
patent: 2467642 (1946-09-01), Ashworth
patent: 3003370 (1981-10-01), Coulter, Jr.
patent: 3305923 (1967-02-01), Zimmer
patent: 3495670 (1970-02-01), Ditson
patent: 4054449 (1977-10-01), Dunn
patent: 4164527 (1979-08-01), Bakul
patent: 4198233 (1980-04-01), Frehn
patent: 4276788 (1981-07-01), van Nederveen

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