Earth-boring drill bits

Details Earth-boring drill bits Earth-boring drill bits

1978-06-08

1981-01-13

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Magnetized or with magnet

175410, E21B 936, E21C 1301

Patent

active

042444322

ABSTRACT:
The invention relates to the design of earth bore-hole drill bits employing shaped preform cutters containing hard abrasive materials, such as diamonds, the cutters being mounted in companion preformed sockets in a hard metal bit matrix.

REFERENCES:
patent: 2693938 (1954-11-01), Roberts
patent: 2960312 (1960-11-01), Kandle
patent: 3106973 (1963-10-01), Christensen
patent: 3693735 (1972-09-01), Cortes
patent: 3696875 (1972-10-01), Cortes
patent: 3709308 (1973-01-01), Rowley et al.
patent: 3747699 (1973-07-01), Feenstra et al.
patent: 3938599 (1976-02-01), Horn
patent: 4006788 (1977-02-01), Garner

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