Drag blade bit with diamond cutting elements

Details Drag blade bit with diamond cutting elements Drag blade bit with diamond cutting elements

1983-04-29

1985-02-19

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Magnetized or with magnet

175410, 175413, E21B 1046

Patent

active

044999585

ABSTRACT:
A drag blade bit for connection on a drill string has a hollow body on which there are welded a plurality of cutting or drilling blades. The blades extend longitudinally and radially of the bit body and terminate in relatively flat, radially extending cutting edges. A plurality of cutters are positioned in and spaced along the cutting edges and consists of cylindrical sintered carbide inserts with polycrystalline diamond cutting elements mounted thereon. Hardfacing is provided on the cutting edges between the cutters and on the other surfaces of the blades and the bit body subject to abrasive wear. One or more nozzles are positioned in passages from the interior of the bit body for directing flow of drilling fluid for flushing cuttings from the well bore and for cooling the bit.

REFERENCES:
patent: 2867413 (1959-01-01), Olsen
patent: 2978049 (1961-04-01), Skidmore et al.
patent: 3645346 (1972-02-01), Miller et al.
patent: 3760844 (1973-09-01), Pitifer
patent: 4246977 (1981-01-01), Allen
patent: 4350215 (1982-09-01), Radtke
Servco Tungsten Carbide Hardfacing Material brochure, May 1, 1979, (copyright, 1978).

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