Rock bit for a down-the-hole drill

Details Rock bit for a down-the-hole drill Rock bit for a down-the-hole drill

1990-05-07

1991-06-25

Britts, Ramon S.

Boring or penetrating the earth

Bit or bit element

With fluid conduit lining or element

175410, 175418, E21B 1000

Patent

active

050258753

ABSTRACT:
A rock bit for a down-the-hole drill provides auxiliary flow paths for flushing the working face of the drill bit to facilitate the removal of cuttings and debris through peripheral troughs in the drill thereby significantly reducing the abrasive effect of the cuttings and debris on the bit body. The exhaust fluid is supplied to the working face of the drill bit through several delivery channels spaced equidistantly about the periphery of the drill head where a first set of delivery channels are disposed at acute angles to the central axis of the drill bit and a second set of delivery channels are interposed directly between the central bore of the drill bit and the working face.

REFERENCES:
patent: 2368512 (1945-01-01), Zimmerman
patent: 2879973 (1959-03-01), Saxman
patent: 2938709 (1960-05-01), Curtis
patent: 3382940 (1968-05-01), Stebley
patent: 3452832 (1969-07-01), Ditson
patent: 3608654 (1971-09-01), Powell et al.
patent: 4299298 (1981-11-01), McEnery et al.
patent: 4323130 (1982-04-01), Dennis
patent: 4406336 (1983-09-01), Olsen et al.
patent: 4676324 (1987-06-01), Barr et al.
patent: 4697654 (1987-10-01), Barr et al.
patent: 4819746 (1989-04-01), Brown et al.
patent: 4883136 (1989-11-01), Trujillo

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