Apparatus and method for installing well casings in the ground e

Counterbalance enabled power generator for horizontal...

Cycloidal drill bit

Cycloidal earth cutting system with rocker-type nutating action

Device for the transmission and distribution of the...

Down hole cycloidal drill drive

Earth penetrating apparatus for obtaining sediment samples, driv

Energy accelerator

Method and apparatus for transversely boring the earthen formati

Rotary steerable system for use in drilling deviated wells

Smart-ultrasonic/sonic driller/corer

Sonic drill employing orbiting crank mechanism

Sonic drill head

Sonic drill head

Sonic drilling method and apparatus

Sonic drilling system employing spherical drill bit

Sonic system for propelling pilings, drills and the like into th

Ultrasonic drilling apparatus

Vibrator-assisted well and mineral exploratory drilling, and dri

Vibratory drill head apparatus