Rotary drill bit

Boring or penetrating the earth – With storage means for bit lubricant carried by bit or shaft – Rotation of bit actuates lubricant feed means

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Details

175340, 175356, 175374, 175394, E21B 1018, E21B 1020, E21B 1024, E21B 1044

Patent

active

047279435

ABSTRACT:
A drill bit for drilling into earth formations comprising a plurality of sections having connection means to connect said sections to form a unitary drill bit; means in said plurality of sections for storing and delivering lubricants to the cutting cones; and wear bar segments on said plurality of sections to form continuous wear bars about the periphery of said unitary drill bit thus reducing the wear on said unitary drill bit.

REFERENCES:
patent: 1289179 (1918-12-01), Hughes
patent: 2132498 (1938-10-01), Smith et al.
patent: 2676790 (1954-04-01), Turner
patent: 4068731 (1978-01-01), Garner et al.
patent: 4222447 (1980-09-01), Cholet
patent: 4249621 (1981-02-01), Espana
patent: 4343371 (1982-08-01), Baker, III et al.
patent: 4372399 (1983-02-01), Cork
patent: 4496013 (1985-01-01), Serpa
patent: 4549616 (1985-10-01), Rumpp et al.
patent: 4591008 (1986-05-01), Oliver

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