Drill bit and method of manufacture

Details Drill bit and method of manufacture Drill bit and method of manufacture

1980-09-22

1982-09-21

Purser, Ernest R.

Boring or penetrating the earth

Bit or bit element

Magnetized or with magnet

175410, 76108A, 228122, E21B 1058

Patent

active

043502156

ABSTRACT:
A drag drill bit includes a plurality of cutter assemblies comprising synthetic polycrystalline diamonds which are held by brazing material within dimensionally controlled pockets formed in the drill bit matrix. The method of manufacturing the bit includes forming the drill bit head by powder metallurgy with a plurality of dimensionally controlled pockets, placing brazing material in communication with each pocket, locating and fixturing a cutter assembly within each pocket by force-fit and brazing the cutter assemblies to the bit head by a furnace cycle.

REFERENCES:
patent: 2027787 (1936-01-01), Ridgway et al.
patent: 2578351 (1951-12-01), Griffiths
patent: 2597771 (1952-05-01), Bergstrom
patent: 3600795 (1971-08-01), Brundin
patent: 4006788 (1977-02-01), Garner
patent: 4073354 (1978-02-01), Rowley et al.
patent: 4098362 (1978-07-01), Bonnice
patent: 4128136 (1978-12-01), Generoux
patent: 4148368 (1979-04-01), Evans
patent: 4156329 (1979-05-01), Daniels et al.
patent: 4200159 (1980-04-01), Peschel

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