Drag drill bit having improved flow of drilling fluid

Details Drag drill bit having improved flow of drilling fluid Drag drill bit having improved flow of drilling fluid

1987-03-26

1989-01-03

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Magnetized or with magnet

175393, 175394, E21B 1046, E21B 1060

Patent

active

047949945

ABSTRACT:
A drag type rotary bit (10) having polycrystaline diamond compact (PDC) cutting elements arranged in a plurality of rows extending from the center of the bit body (12) to the outer peripheral surface (20) thereof. A fluid discharge nozzle (38A-38F) is provided for each row of cutting elements (36A-36G) and has a fluid discharge stream (62) directed downwardly against the bore hole bottom (66) and opposite the direction of rotation of the bit (10) ahead of the associated row of cutting elements (36A-36G) for flowing against the cutting faces (53) of the cutting elements (36A-36G) after impingement of the bore hole bottom (66).

REFERENCES:
patent: 3220497 (1965-11-01), Mori
patent: 4116289 (1978-09-01), Feenstra
patent: 4246977 (1981-01-01), Allen
patent: 4350215 (1982-09-01), Radtke
patent: 4452324 (1984-06-01), Jurgens
patent: 4460053 (1984-07-01), Jurgens et al.
patent: 4471845 (1984-09-01), Jurgens
patent: 4682663 (1987-07-01), Daly et al.

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