Drill bits with cone retention means

Details Drill bits with cone retention means Drill bits with cone retention means

1985-05-06

1987-04-14

Leppink, James A.

Boring or penetrating the earth

With storage means for bit lubricant carried by bit or shaft

Rotation of bit actuates lubricant feed means

175340, 175371, 175369, 384 93, 384 96, E21B 1022

Patent

active

046570918

ABSTRACT:
There is disclosed a drill bit which is connectable to the lower end of a rotary drill string for use in drilling oil and gas wells as drilling mud is circulated downward through the string, out the bit, and upwardly within the annulus between the string and well bore so as to remove cuttings therefrom. The bit has cones which are mounted for rotation about thrust bearings which extend inwardly from the lower ends of legs which depend from a shank at the upper end of the bit body which is attached to the drill string.

REFERENCES:
patent: 2174102 (1939-09-01), Catland
patent: 3244459 (1966-04-01), Ortloff

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