Bearings – Rotary bearing – Roller drill bit
Patent
1985-11-01
1987-02-10
Levy, Stuart S.
Bearings
Rotary bearing
Roller drill bit
175371, 384913, E21B 1022, F16C 1712, F16C 3312
Patent
active
046419764
ABSTRACT:
This invention relates to the use of spinodal alloys consisting essentially of copper-nickel-tin for bearing surfaces formed between roller cutter cones of sealed bearing rock bits.
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patent: 4142918 (1979-03-01), Plewes
patent: 4260432 (1981-04-01), Plewes
Lefeure et al, Age Hardening in Cu-15Ni-8Sn Alloy, 1978, "American Society for Metals and the Metallurgical Society of AIME.
Levy Stuart S.
Smith International Inc.
Sohacki Lynn M.
Upton Robert G.
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