Well drilling bit

Details Well drilling bit Well drilling bit

1975-09-23

1976-12-07

Purser, Ernest R.

Boring or penetrating the earth

Bit or bit element

Impact or percussion type

175417, E21C 1308

Patent

active

039957071

ABSTRACT:
A well drilling bit of generally circular transverse cross-section and generally in the form of an elongated, generally cylindrical metal bit which tapers slightly outwardly toward its lower end with the lower end having a slight outward flare around the periphery thereof. A pair of diametrically opposed water courses in the form of longitudinal grooves extend from the lower end of the bit to a point adjacent the upper end thereof with the upper end of the bit having a screw threaded connection to the jar. The lower end of the bit is provided with a plurality of substantially parallel ridges and grooves in which the two center ridges are slightly higher than the others and the bottom end surface of the bit is slightly concave from edge to edge along the length of the ridges and valleys.

REFERENCES:
patent: 202023 (1878-04-01), Grubs
patent: 280543 (1883-07-01), Whitcomb
patent: 791264 (1905-05-01), Hardsocg
patent: 1483296 (1924-02-01), Gill
patent: 2863639 (1958-12-01), Bredesen
patent: 3283837 (1966-11-01), McKain

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