Rotary drill bit

Details Rotary drill bit Rotary drill bit

1985-05-20

1987-02-10

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175353, E21B 1016

Patent

active

046417184

ABSTRACT:
A rotary drill bit comprising a cutter bit (10) having a plurality of mutually displaced rows (12-17) of cutting means (11) extending in the circumferential direction of the cutter bit (10). The included cone angle (.alpha.) of the cutter bit (10) is larger than 90.degree. and adapted to the mutual positioning of the cutting means (11) on the cutter bit (10) in such a way that it is ensured that repetition of the pattern of the cutting means is avoided.

REFERENCES:
patent: 1238757 (1917-09-01), Gardner
patent: 1859948 (1932-05-01), Zublin
patent: 2058749 (1936-10-01), Williams et al.
patent: 2336335 (1943-12-01), Zublin
patent: 2362860 (1944-11-01), Rossman
patent: 3126066 (1964-03-01), Williams, Jr.
patent: 3726350 (1973-04-01), Pessier
patent: 3858670 (1975-01-01), Ott et al.
patent: 4089382 (1978-05-01), Pessier
patent: 4154312 (1979-05-01), Barnetche
patent: 4187922 (1980-02-01), Phelps
patent: 4248314 (1981-02-01), Cunningham et al.

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