HYDRIL

Oil field services, namely oil-well casing, tubing and drill pipe installation; repair and maintenance services for oil and gas wells, pipes, tubing and casing; installation, repair and maintenance for oil well blowout preventers and parts therefore; rental of oil-well drilling and production equipment

Threading services, namely, threading of oil field pipes, tubing and casing

Design and testing of tubing, pipes, casing, and threads thereon, including oil and gas well tubing, pipe casing, drilling pipe, production pipe, risers, and accessories therefor for others