Rock bit with improved shank protection

Details Rock bit with improved shank protection Rock bit with improved shank protection

1990-05-11

1991-12-24

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175332, 175408, 175410, 175415, E21B 1036, E21B 1052

Patent

active

050743678

ABSTRACT:
An improved rotary rock bit is described having a plurality of wear resistant inserts protruding along the leading edge of the bearing segment shanks. These inserts break up large chunks of formation which protrude inward from the borehole wall while drilling fractured or broken hard formations. Thereby protecting the bit from damage and excessive erosion often incurred while drilling hard fractured and broken formations.

REFERENCES:
patent: 3120285 (1964-02-01), Rowley et al.
patent: 3130801 (1964-04-01), Schumacher, Jr.
patent: 3134447 (1964-05-01), McElya et al.
patent: 3628616 (1971-12-01), Neilson
patent: 4068731 (1978-01-01), Garner et al.
patent: 4630694 (1986-12-01), Walton et al.
patent: 4936398 (1990-06-01), Auty et al.

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