Earth-boring drill bits

Details Earth-boring drill bits Earth-boring drill bits

1976-11-26

1978-02-14

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Magnetized or with magnet

175391, 175410, E21B 936, E21B 1301

Patent

active

040733548

ABSTRACT:
The invention relates to the design of earth boring bits employing shaped preform cutters containing hard abrasive materials such as diamonds.

REFERENCES:
patent: 2268775 (1942-01-01), Potvin
patent: 2371490 (1945-03-01), Williams, Jr.
patent: 3135341 (1964-06-01), Ritter
patent: 3174564 (1965-03-01), Morlan
patent: 3321034 (1967-05-01), Webb
patent: 3382940 (1968-05-01), Stebley
patent: 3709308 (1973-01-01), Rowley et al.
patent: 3768581 (1973-10-01), Rederon
patent: 3938599 (1976-02-01), Horn
patent: 3982596 (1976-09-01), Vetter
patent: 4006788 (1977-02-01), Garner

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