WCT

oil and gas well downhole equipment and service tools and parts therefore, namely, valves being parts of oil and gas well downhole equipment and services tools, ball bearings for use in oil and gas well downhole equipment and service tools, cement retainers, head studs for oil and gas downhole equipment and service tools, bits for drilling and milling of oil and gas well downhole equipment, production packers, and setting equipment being anchor catchers, setting sleeves, bow springs, and mandrels

oil and gas well downhole equipment, namely, bridge plugs and fracturing plugs composed of plastic and synthetic rubber for controlling pressure or fluids downhole