Bearings – Rotary bearing – Antifriction bearing
Patent
1991-01-15
1991-12-24
Hannon, Thomas R.
Bearings
Rotary bearing
Antifriction bearing
175107, 384611, E21B 400, F16C 1902
Patent
active
050746812
ABSTRACT:
A downhole motor includes a bearing assembly for allowing rotational and bidirectional axial movement of a drive shaft in a housing. The bearing assembly includes a stationary race member, a displaceable race member, ball bearings disposed between the race members, and resilient load carrying members for distributing axial thrust loading from the drive shaft to the displaceable race member when the drive shaft is axially displaced in a first direction. The bearing assembly further includes resilient preload members for maintaining the ball bearings in contact with the race members in the absence of axial loading and when the drive shaft is axially displaced in a second direction. The downhole motor of the present invention provides a high axial thrust load capacity, prevents shock loading on the bearing assembly during sudden changes in the direction of axial loading on the bearing assembly and exhibits improved durability during cyclic bidirectional axial thrust loading.
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Lee Lynn M.
Turner William E.
Zitka Mark D.
Hannon Thomas R.
Teleco Oilfield Services Inc.
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