HYDRIL

Metal oil well tubing, drill pipe and casing, production pipe and risers; metal pipes and fittings therefor; metal drill pipe with threads, metal casing joints, tubing joints, drill stem joints, pipe connectors and flush joint drill pipes; offshore drilling equipment, namely, metal marine drilling and production risers and accessories, and connections therefor

Well drilling machinery and drilling tools namely, tool joints, safety joints, gas-pressure-control valves, pneumatic valves, choke valves, drill-stem valves, hydraulic valves, mud pumps, oil pumps and parts thereof; water pumps and parts thereof; subsea multiplex electro-hydraulic control systems comprising hydraulic valve actuators, hydraulic control valves, and multiplexed digital control computers and software

Pressure control equipment, namely, blowout preventers and well tools, namely annular diverters; pressure control equipment, namely, accumulators and pulsation dampeners