Cutting structures for steel bodied rotary drill bits

Details Cutting structures for steel bodied rotary drill bits Cutting structures for steel bodied rotary drill bits

1988-01-25

1990-04-24

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Magnetized or with magnet

761082, 175410, E21B 1046

Patent

active

049192205

ABSTRACT:
A rotary drill bit for use in drilling or coring holes in subsurface formations comprises a bit body having a shank for connection to a drill string, a plurality of cutting structures mounted at the surface of the bit body, and a passage in the bit body for supplying drilling fluid to the surface of the bit body for cooling and/or cleaning the cutting structures. The bit body is formed from steel, and each cutting structure comprises a cutting element, in the form of a unitary layer of thermally stable polycrystalline diamond material, brazed to a carrier received in a socket in the steel body of the bit.

REFERENCES:
patent: 4156329 (1979-05-01), Daniels et al.
patent: 4225322 (1980-09-01), Knemeyer
patent: 4350215 (1982-09-01), Radtke
patent: 4397361 (1983-08-01), Langford, Jr.
patent: 4505721 (1985-03-01), Almond et al.
patent: 4624830 (1986-11-01), Barr
patent: 4686080 (1987-08-01), Hara et al.
patent: 4699227 (1987-10-01), Wardley
patent: 4726718 (1988-02-01), Meskin et al.

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