Drill bit and method of metallurgical and mechanical holding of

Details Drill bit and method of metallurgical and mechanical holding of Drill bit and method of metallurgical and mechanical holding of

1981-04-30

1984-06-12

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

76108A, 76DIG11, 76DIG12, 228255, 29447, E21B 1052

Patent

active

044536054

ABSTRACT:
Disclosed is a method and apparatus for mechanically and metallurgically holding a cutter in a drill bit pocket. The method includes using powder metallurgy techniques in the formation of a drill bit member having a plurality of pockets configured to inhibit displacement of cutters out of the pockets in a direction transverse to the drill bit working surface. The method further includes the steps of metallurgically bonding and mechanically engaging the cutter with the cutter pocket. The drill bit manufactured in accordance with the methods of the present invention include a carbide menstrum drill bit head having a working surface with a plurality of fluid courses and nozzles thereon in adjacent relationship with a plurality of cutter blade bands comprising a series of cutter pockets having cutters disposed therein in a fashion parallel with the working surface.

REFERENCES:
patent: 3294186 (1966-12-01), Buell
patent: 3894673 (1975-07-01), Lowder et al.
patent: 4098363 (1978-07-01), Rohde et al.
patent: 4156329 (1979-05-01), Daniels et al.
patent: 4157122 (1979-06-01), Morris
patent: 4186628 (1980-02-01), Bonnice
patent: 4200159 (1980-04-01), Peschel et al.
patent: 4225322 (1980-09-01), Kremeyer
patent: 4276788 (1981-07-01), van Nederveen
patent: 4327473 (1982-05-01), Somerville

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