Radial cut drill bit insert

Details Radial cut drill bit insert Radial cut drill bit insert

Filed on

1991-03-06

Date issued

1993-02-09

Examiner

Britts, Ramon S.

Patent Class

Boring or penetrating the earth

SubClass

Bit or bit element

SubSubClass

Impact or percussion type

Other Related Categories

408211, E21B 1044

Type

Patent

Status

active

Patent number

051846896

Description

ABSTRACT:
An insert for use in a rotary drill bit wherein first and second top surfaces are opposite a bottom surface, first and second leading faces are opposite first and second trailing faces, and first and second end faces represent outside edges of first and second portions of the insert wherein in one embodiment each of the top surfaces meets its respective leading face to form a cutting edge which forms an oblique angle wherein the cutting edge on the first portion is linearly aligned with the cutting edge on the second portion.

REFERENCES:
patent: 603748 (1898-05-01), Thau
patent: 984323 (1911-02-01), Vauclain
patent: 2903921 (1959-09-01), Andreasson
patent: 3199381 (1965-08-01), Mackey
patent: 3667857 (1972-06-01), Shaner et al.
patent: 4120601 (1978-10-01), Benjamin
patent: 4342368 (1982-08-01), Denman
patent: 4489796 (1984-12-01), Sanchez et al.
patent: 4527638 (1985-07-01), Sanchez et al.
patent: 4688972 (1987-08-01), Kubota
patent: 4787464 (1988-11-01), Ojanen
patent: 4826364 (1989-05-01), Grunsky
patent: 5094572 (1992-03-01), Alsbury et al.

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