Archimedes spiral drill bit

Details Archimedes spiral drill bit Archimedes spiral drill bit

1974-08-19

1976-04-20

Abbott, Frank L.

Boring or penetrating the earth

Bit or bit element

With fluid conduit lining or element

175398, 175404, 175410, E21B 916, E21B 936

Patent

active

039512207

ABSTRACT:
A drill bit for use in concentrically arranged dual drill strings. The bit has an outlet eccentrically arranged respective to its longitudinal axial centerline, and a formation engaging surface made of a plurality of spiraling faces which diminish in area as the cutting face curves about and toward the outlet. The area located between the spiraling faces form fluid conveying passageways through which a jet of fluid is directed toward the outlet, thereby carrying therewith cuttings formed by the spiral faces of the bit.

REFERENCES:
patent: 2264617 (1941-12-01), Carpenter et al.
patent: 2838284 (1958-06-01), Austin
patent: 3095935 (1963-07-01), Hildebrandt et al.
patent: 3158216 (1964-11-01), Baron et al.
patent: 3583504 (1971-06-01), Aalund
patent: 3845830 (1974-11-01), Fowler et al.
patent: R26669 (1969-09-01), Henderson

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