A bore hole tool assembly utilizes a multi-stage bearing system deployed
between an inner mandrel and an outer tool housing wherein each bearing
stage includes bearing element deployed between two deformable elements.
The deformable elements are selected, based on the design and material
characteristics of the housing, mandrel and bearings, such that tension
and compressive loads are distributed proportionally across each bearing
stage. A method for calculating loading and the selection of the
deformable elements is also disclosed.