Specially shaped cutting element for earth boring apparatus

Details Specially shaped cutting element for earth boring apparatus Specially shaped cutting element for earth boring apparatus

1986-12-22

1988-01-05

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

E21B 1016, E21B 1052

Patent

active

047169770

ABSTRACT:
A cutter element for a rotary type rock bit used in drilling soft earth formations in which the cutter element includes a base and a generally dual pyramidic cutting tip. The cutting tip extends from the base to a crest and is formed having axially symmetrical opposite flanks that extend longitudinally merging toward a distal end at which a single elongated crest of substantially uniform width is formed about an apex.

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patent: 3442342 (1969-05-01), McElya et al.
patent: 3495668 (1970-02-01), Schumacher, Jr.
patent: 3743038 (1973-07-01), Bennett
patent: 4058177 (1977-11-01), Langford et al.
patent: 4086973 (1978-05-01), Keller et al.
patent: 4108260 (1978-08-01), Bozarth
patent: 4168923 (1979-09-01), Vezirian

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