Check valves as machine components; electric motors for machines; electric motors for machines with a digital servo drive controller; hydraulic valve actuators being parts of machines; hydraulic valve actuators; hydraulic valves being parts of machines; pressure controllers being parts of machines, namely, valves; pump control valves; safety valves as machine components; fatigue and endurance testing machines; servomotors; fatigue and endurance testing machines for use in power-operated drilling tools; servo-valves; shock absorbers for machines; valves being parts of machines; power-operated downhole tools for use in oil and gas drilling operations and components thereof, namely, rotary servo valves used to operate fatigue and endurance testing machines, pulser drivers used to control pulsers, and servo valve assemblies; vibration dampeners for power-operated oil and gas drilling tools

Digital signal processors; electromagnetic coils; electromagnetic frequency detectors being electromagnetic apparatus used to measure magnetic fields; electromagnetic measuring detectors; electromagnetic relays; electromagnetic switches; electronic servo motor controllers; flow meters; long range radio and telephone transmitters; oil and gas well downhole survey and measurement equipment; pressure sensors; pressure switches; pressure transmitters; recorded computer software for managing automated directional steering control in oil and gas drilling rig equipment; remote temperature sensors; signal processors; temperature sensors; drilling resistivity sensors; electronic controllers for operating fatigue and endurance testing machines; electronic controllers for use with power converters; electronic industrial controllers for fatigue and endurance testing machines; gamma radiation sensors; automatic check valves; automatic safety valves

Rental of oil well drilling tools; installation, maintenance, and repair of drilling and mining tools; rental of oil well drilling tools, namely, oil and gas well measurement tools and downhole measure-while-drilling tool components; providing technical support services, namely, technical consultation in connection with the operation of oil and gas well drilling tools, components and power-operated downhole tools; providing technical support services, namely, technical consultation in connection with the operation of oil and gas well measurement equipment, and downhole measure-while-drilling tool components

Material testing; measurement evaluations in the drilling field; oil and gas drilling engineering; providing measurements and downhole telemetry while drilling oil and gas wells; analysis of oil fields; oil field surveying; rental of measuring apparatus, namely, oil and gas well measurement apparatus