Power operated tools used in a wellbore, namely, tools for extending the reach that tubing can be pushed into deviated wellbore, enhancing the delivery of well stimulation fluids, enhancing wellbore cleaning, enhancing the transport of debris out of the wellbore, and freeing stuck equipment in a borehole

A power operated tool for extending the reach that tubing can be pushed into deviated wellbores by creating periodic water-hammer pressure pulses inside the tubing and in the wellbore