42 Material testing; measurement evaluations in the drilling field; oil and gas drilling engineering; Oil and gas well drilling services, namely, providing measurements and downhole telemetry while drilling; oil field analysis; oil field surveying; 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