CHIEF OF THE TRADE

Drilling rigs; Oil-well pumping machines; Valves being parts of oilfield equipment and oilfield pressure control equipment and machines, not being pressure relief valves; Well drilling machines

Control valves for regulating the flow of gases and liquids; Pressure control equipment, namely, blowout preventers; Pressure relief valves for oil wells; Safety valves for flow shutoff in well construction

Services comprising the recording, transcription, composition, compilation and systematization of written communications and recordings, as well as the compilation of mathematical or statistical data

Drilling and pumping of oil; Drilling for crude oil; Drilling of wells; Maintenance and/or repair of oilfield pressure control equipment; Oil and gas drilling; Oil well drilling; Rental of oil well drilling tools; Well drilling

Oil well testing