Rock bit circulation nozzle

Details Rock bit circulation nozzle Rock bit circulation nozzle

1986-01-15

1987-08-18

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175393, 175424, 166222, 239489, 2395905, E21B 1018

Patent

active

046870660

ABSTRACT:
A drill bit having a nozzle for drilling fluid to pass out of the drill bit and into the bore hole is disclosed. In one embodiment two diagonal passages through the nozzle impart angular momentum to the drilling fluid. In another embodiment, four diagonal passages through the nozzle impart angular momentum. In still another embodiment, a central bore hole through the nozzle has helical grooves along its internal orifice wall to impart angular momentum. The angular momentum causes the drilling fluid exiting from the interior of the drill bit to flow downward into the bore hole in a divergent vortex that sweeps the cuttings away from the cutting surfaces of the drill bit.

REFERENCES:
patent: Re31495 (1984-01-01), Zublin
patent: 2122808 (1938-07-01), Catland
patent: 3275248 (1966-09-01), O'Brien et al.
patent: 3536263 (1970-10-01), Parker
patent: 4106577 (1978-08-01), Summers
patent: 4175626 (1979-11-01), Tummel
patent: 4239087 (1980-12-01), Castel et al.
patent: 4337899 (1982-07-01), Selberg

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