Rock bit with specially shaped inserts

Details Rock bit with specially shaped inserts Rock bit with specially shaped inserts

1977-04-01

1978-08-22

Purser, Ernest R.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175376, 175410, E21B 936

Patent

active

041082605

ABSTRACT:
A specially shaped insert of the type used for the cutter teeth of rock bits used in drilling soft and medium formations of the earth. The insert is generally chisel-shaped with flanks converging to a crest. The flanks are asymmetrical with respect to each other. The leading flank is scoop-shaped and the trailing flank is rounded outwardly.

REFERENCES:
patent: 1859717 (1932-05-01), Rutrle
patent: 3388757 (1968-06-01), Fittinger
patent: 3743038 (1973-07-01), Bennett
patent: 4006788 (1977-02-01), Garner

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