Abstract: A downhole tool for use in a downhole drill string is provided. The downhole tool includes a rotor movably coupled within a stator, and a drive shaft movably coupled within a bearing housing. The drive shaft has a first end coupled with the rotor and a second end coupled with a drill bit. Bearing assemblies interfaces engagement between the drive shaft and the bearing housing, including polycrystalline diamond elements, each with an engagement surface, and an opposing engagement surface of a non-superhard metal.

Abstract: A method is provided for determining a suggested vehicle part order for a vehicle retailer by a vehicle part inventory management system. The method includes the steps of: (a) receiving from the vehicle retailer at least one of a target fill rate and a target inventory investment; (b) accessing part demand forecast information for the vehicle retailer; (c) accessing part cost information; and (d) determining a suggested part order for the vehicle retailer based on the part demand forecast information and the part cost information in view of the target fill rate or the target inventory investment input by the vehicle retailer.