Boring or penetrating the earth – Bit or bit element – With helical-conveying portion
Patent
1989-06-02
1990-12-11
Kisliuk, Bruce M.
Boring or penetrating the earth
Bit or bit element
With helical-conveying portion
175410, E21B 1044
Patent
active
049763253
ABSTRACT:
A carbide-tipped drill bit and method for manufacture is presented which produces drill bits of consistent geometries in which the flutes are machine ground in one step, which eliminates the hand blending operation of the carbide insert as used in the prior art. As a result, carbide-tipped drill bits are manufactured having a single helix angle which is consistent from drill bit to drill bit.
REFERENCES:
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patent: 1323988 (1919-12-01), Kellogg
patent: 1847302 (1932-03-01), Emmons
patent: 1977845 (1934-10-01), Emmons
patent: 3017790 (1962-01-01), Werle
patent: 4314616 (1982-02-01), Rauckhorst et al.
patent: 4356873 (1982-11-01), Dziak
patent: 4503920 (1985-03-01), Clement
patent: 4642003 (1987-02-01), Yoshimura
patent: 4679971 (1987-07-01), Maier
patent: 4696355 (1987-09-01), Haussmann
Carolina Twist Drill, Inc.
Kisliuk Bruce M.
Melius Terry Lee
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