Downhole motor bearing assembly

Details Downhole motor bearing assembly Downhole motor bearing assembly

1986-08-27

1988-03-22

Levy, Stuart S.

Bearings

Rotary bearing

Roller drill bit

175320, 384420, 384424, E21B 1022, F16C 1710, F16C 3312

Patent

active

047324910

ABSTRACT:
A downhole drive shaft and bearing structure having a unitary, generally cylindrical housing with a radial bearing surface affixed to its interior; a drive shaft having a radial bearing surface affixed to its exterior and thrust bearing inserts mounted at the bit end thereof; and a drive shaft cap affixed to the drive shaft and carrying thrust bearing inserts, the thrust bearing inserts of the cap and drive shaft interfacing with oppositely disposed inserts mounted in the housing.

REFERENCES:
patent: T102901 (1983-04-01), Offenbacher
patent: 2331584 (1943-10-01), Underwood
patent: 2581252 (1952-01-01), Goetzel et al.
patent: 3127224 (1964-03-01), Owens et al.
patent: 3456746 (1969-07-01), Garrison et al.
patent: 3879094 (1975-04-01), Tschirky et al.
patent: 4017480 (1977-04-01), Baum
patent: 4146080 (1979-03-01), Baum
patent: 4169637 (1979-10-01), Voitas
patent: 4199201 (1980-04-01), Trzeciak
patent: 4410054 (1983-10-01), Nagel et al.
patent: 4468138 (1984-08-01), Nagel
patent: 4560014 (1985-12-01), Geczy

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