T-post hole-forming device and use for installing a T-post
Technique for damping oscillations in a drill string
Technique for damping oscillations in a drill string
Technique for steering a downhole hammer
Telescopic kelly bar apparatus and method
Telescoping joint
Tension/collar/reamer assemblies and methods
Tension/collar/reamer assemblies and methods
Tension/collar/reamer assemblies and methods
Tension/collar/reamer assemblies and methods
Thermal drill cuttings treatment with weir system
Thermal process for treating hydrocarbon-contaminated drill...
Threaded cone retention system for roller cone bits
Threaded ring retention mechanism
Three dimensional steering system and method for steering...
Thrust control apparatus
Tool and method for drilling a hole with an increased cross-sect
Tool and method for drilling, reaming, and cutting
Tool and method for soil sampling
Tool for changing the drilling direction while drilling