Process and universal downhole motor for driving a tool
Progressing cavity motor governing system
Progressive cavity drive train with elastomeric joint assembly f
Retrievable bit and eccentric reamer assembly
Reverse-circulation drilling method and system
Rotary earth boring tool
Rotary seal for directional drilling tools
Rotating shaft seal and bearing lubricating apparatus
Rotor of a screw hydraulic downhole motor, method for its produc
Seal for well drilling assembly
Sealed bearing assembly used in earth drilling
Sealing system for a sealed bearing assembly
Self-blocking safety device
Solids diverter for a downhole drilling motor
Stabilized down hole drilling motor
System for use in a bore hole for axially coupling a tubular...
Systems and methods for protecting drill blades in high...
Thrust bearing assembly
Thrust bearing assembly for a downhole drill motor
Thrust-bearing assembly