Asymmetric gage insert for an earth boring apparatus

Details Asymmetric gage insert for an earth boring apparatus Asymmetric gage insert for an earth boring apparatus

1977-03-07

1977-11-15

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175410, E21B 910, E21B 1301

Patent

active

040581772

ABSTRACT:
An asymmetric gage row insert provides a larger amount of wall contacting surface thereby decreasing the wear on the gage insert and increasing the ability of the earth boring apparatus to maintain a full gage hole. The insert has a shape prior to assembly onto the earth boring apparatus that includes a base integrally joined to an asymmetric head. The base is mounted in a socket in the earth boring apparatus. The head projects from the earth boring apparatus and includes an extended gage cutting surface. The gage cutting surface is the largest plane surface on the head. The gage cutting surface contacts the wall of the hole with the majority of the length of its extended surface and with the same angle as the gage angle of the bit.

REFERENCES:
patent: 948269 (1910-02-01), Crowley
patent: 3442342 (1969-05-01), McElya
patent: 3495668 (1970-02-01), Schumacher
patent: 3522852 (1970-08-01), Bardwell

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