| 摘要 |
A method and apparatus according to which the optimal radius of a thrust bearing in a well tool is determined. In one embodiment, the method includes receiving inputs representing a plurality of geometric characteristics and material properties of the well tool, the well tool including a housing, a shaft extending within the housing, and the thrust bearing, which includes convex and concave surfaces that define an interface having a radius; determining, based on the inputs, an expected value of the bending moment of the well tool in the vicinity of the thrust bearing; determining, based on the expected value of the bending moment, one or more expected values of the radial reaction force at the interface, which values depend upon the radius of the interface; and selecting, based on the one or more expected values of the radial reaction force, an optimal radius of the interface. |
