Bowed out chisel insert for rock bits

Details Bowed out chisel insert for rock bits Bowed out chisel insert for rock bits

1994-06-09

1995-06-06

Dang, Hoang C.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175426, E21B 1016

Patent

active

054214246

ABSTRACT:
A chisel type insert is disclosed having a contoured surface in which the vertical lines located on the surface are bowed outwardly in a convex manner thereby eliminating blend radii from the cutting tip and the high stress concentrations associated therewith.

REFERENCES:
patent: 3442342 (1969-05-01), McElya et al.
patent: 4058177 (1977-11-01), Langford, Jr. et al.
patent: 4108260 (1978-08-01), Bozarth
patent: 4716977 (1988-01-01), Huffstutler
patent: 4722405 (1988-02-01), Langford, Jr.
patent: 4854405 (1989-08-01), Stroud
patent: 5201376 (1993-04-01), Williams
patent: 5322138 (1994-06-01), Siracki

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