Drilling machines and drilling tools in the nature of a downhole drill bit for use in drilling of oil and gas wells and pumping oil by means of pressure differentials and for developing and relaying information for the logging of oil and gas wells; drills, drill bits, drill heads and drill strings for use in drilling oil or gas wells

Logging tools, namely, downhole computer hardware and software to make a record of depth or time measurements, or both, to reflect the subsurface geology of an oil or gas well

Installation, repair, maintenance, and operation of drilling machines and drilling tools in connection with drilling oil and gas wells; installation, repair, maintenance, and operation of pumping systems for conveying drilling tools and logging tools in connection with drilling oil and gas wells; installation, repair, maintenance, and operation of drills, drill bits, drill heads and drill strings in connection with drilling oil and gas wells

Analysis for oil and gas field exploration; oil or gas well logging services