Lubricant system for a rotary cone rock bit

Details Lubricant system for a rotary cone rock bit Lubricant system for a rotary cone rock bit

1990-03-02

1993-02-23

Hannon, Thomas R.

Bearings

Rotary bearing

Roller drill bit

384123, F16C 3206, E21B 1022

Patent

active

051884623

ABSTRACT:
A radially disposed thrust bearing surface formed in a rotary cone is provided with at least a pair of grooves and a ramp surface on the trailing edge of the grooves. The groove provides a lubricant reservoir and the ramp serves to generate hydrodynamic pressures during rotation of the rotary cone on the thrust surface of a journal bearing thereby distributing a film of lubricant on the opposing thrust bearing surfaces.

REFERENCES:
patent: 4136748 (1979-01-01), Dickerhoff
patent: 4181185 (1980-01-01), Keller et al.
patent: 4330158 (1982-05-01), Walters
patent: 4333691 (1982-06-01), Cooper
patent: 4348065 (1982-09-01), Yoshioka et al.
patent: 4380355 (1983-04-01), Beardmore
patent: 4410284 (1983-10-01), Herrick
patent: 4657091 (1987-04-01), Higdon
patent: 4771744 (1988-09-01), Corbett
patent: 4875532 (1989-10-01), Langford, Jr.

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