Bearings – Rotary bearing – Roller drill bit
Patent
1982-05-19
1983-11-08
Levy, Stuart S.
Bearings
Rotary bearing
Roller drill bit
384243, 384420, F16C 3300, F16C 1704
Patent
active
044139187
ABSTRACT:
An intermediate thrust bearing is positioned between the rotating cutters and its bearing pin of an earth-boring bit. The intermediate bearing is so configured to take outthrust loads, without rotation, that are directed axially against a radially disposed surface of the roller cone journal as the rock bit works in a borehole.
REFERENCES:
patent: 2690935 (1954-10-01), Alexander
patent: 3720274 (1973-03-01), McCallum
patent: 3795430 (1974-03-01), Farley
patent: 3995917 (1976-12-01), Quinlan
patent: 4005914 (1977-02-01), Newman
patent: 4136748 (1979-01-01), Dickerhoff
patent: 4323284 (1982-04-01), Childers et al.
Hannon Thomas R.
Levy Stuart S.
Smith International Inc.
Upton Robert G.
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