Soft formation drill bit

Details Soft formation drill bit Soft formation drill bit

1976-07-29

1978-01-10

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175374, E21B 910

Patent

active

040674061

ABSTRACT:
A rock bit with rotary cone cutter means having hardened insert teeth utilizing fewer than the normal number of teeth or of cutters used for a given gage hole wherein the cone cutter body is of greater diameter and for approximately the same axial length, of a greater wall thickness and to accommodate a greater insert tooth depth or grip length and permit a proportional increase in extension of the insert from the cutter body to provide greater penetration with fewer insert teeth in contact at a given time, and also providing for increased journal bearing area to increase the life of the extended insert cutters.

REFERENCES:
patent: 1847824 (1932-03-01), Failing
patent: 1897588 (1933-02-01), Reed
patent: 2244617 (1941-06-01), Hannum
patent: 2333746 (1943-11-01), Scott et al.
patent: 3696876 (1972-10-01), Ott
patent: 3952815 (1976-04-01), Dysart

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