Downhole bearing assembly which accommodates compressive and ten

Details Downhole bearing assembly which accommodates compressive and ten Downhole bearing assembly which accommodates compressive and ten

1996-03-05

1997-09-09

Footland, Lenard A.

Bearings

Rotary bearing

Plain bearing

F16C 1704

Patent

active

056648910

ABSTRACT:
A bearing assembly for bearing tensile and compressive axial loads. In preferred embodiments, the invention is a bearing assembly for use downhole, including a first member and a second member with coinciding central longitudinal axes, and a thrust bearing subassembly in a chamber between the first and second members defined by two shoulders of the first member and two shoulders of the second member. The second member is free to rotate, and has at least limited freedom to translate axially, relative to the first member. The thrust bearing subassembly's overall axial length is such that the first member can translate axially relative to the second member between a first configuration in which the thrust bearing subassembly bears a tensile axial load and a second configuration in which it bears a compressive axial load.

REFERENCES:
patent: 4511193 (1985-04-01), Geczy
patent: 4720199 (1988-01-01), Geczy et al.
patent: 5150972 (1992-09-01), Wenzel
patent: 5364192 (1994-11-01), Damm et al.

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