|Application No.||Application Title||Issue Date|
|20100284636||AIR CIRCULATION PORTS IN ROTARY ROCK BIT JOURNAL BEARING|
A thrust bearing system for a roller cone rock bit includes at least one roller cone disposed on a leg having an air channel therethrough, the thrust bearing system including a primary thrust bearing surface on the leg configured to contact a corresponding primary beari...
|20060120640||Micropore engagement surfaces for earth boring bit|
An earth boring bit has sliding engaging surfaces between a cone assembly and a bearing pin. Micropores are formed in at least one of the engaging surfaces. Each of the micropores has a leading portion and a trailing portion. The leading portion is at a more gradual slo...
|20060110083||Bore hole assembly and method of designing same|
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 d...