Thrust bearing for down-hole tool

Details Thrust bearing for down-hole tool Thrust bearing for down-hole tool

2006-09-12

2006-09-12

Footland, Lenard A. (Department: 3682)

Bearings

Rotary bearing

Antifriction bearing

C384S613000

Reexamination Certificate

active

07104698

ABSTRACT:
There is disclosed an improved bearing and particularly an improved bearing assembly (15, 15A), eg. a thrust bearing assembly, which may be used in down-hole applications, such as down-hole drilling applications. Thrust bearing assemblies for use in down-hole applications have the conflicting requirements of a thick shaft assembly and high axial load bearing capacity in a small cross-section. The invention, therefore, provides: a bearing assembly (15, 15A) having at least two bearing elements (400, 400A) spaced by a first body (500, 500A), the first body (500, 500A) having means for flexing. Thus when a load is applied to the bearing assembly (15, 15A) the first body (500, 500A) is caused to flex. In an embodiment the flexing means comprise at least one circumferential groove or notch (510, 510A) formed on the first body (500, 500A).

REFERENCES:
patent: 1346417 (1920-07-01), Palmgren
patent: 1448189 (1923-03-01), Brunner
patent: 4220380 (1980-09-01), Crase et al.
patent: 5074681 (1991-12-01), Turner et al.
patent: 5690434 (1997-11-01), Beshoory et al.
patent: 239592 (1946-02-01), None
patent: 938343 (1956-01-01), None
patent: 1344318 (1974-01-01), None

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