Bearing stack for a down-hole drilling motor
US9377056B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 23, 2015 |
| Grant date | Jun 28, 2016 |
| Priority date | — |
| Expiry date | Jan 23, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2352/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
There is provided a method of assembling a bearing assembly, having the steps of mounting a bearing stack on an inner mandrel, the bearing stack having a plurality of inner and outer races, compressing the plurality of inner races between first and second inner shoulders to within a predetermined range of compressive loads, the first and second inner shoulders being carried by the inner mandrel, inserting the inner mandrel and bearing stack into an outer housing, compressing the plurality of outer races between first and second outer shoulders to within a predetermined range of compressive loads, the first and second outer shoulders being carried by the housing, wherein at least one of the first outer shoulder and the second outer shoulder comprises a deformable shim that follows a deformation curve having at least a plastic deformation component when compressed across the predetermined range of compressive loads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.