Oil well drilling and completion equipment, namely, remotely operable locking systems comprised primarily of a pipe coupling with remotely operable locks and a lock retaining ring used to attach and detach well service tools to a wellhead

Parts of oilfield wellhead machines, namely, gate valves, ball valves, check valves, plug valves, globe valves, choke and manifold industrial pumps, pump and valve parts, pipe fittings and flanges

Proppant for use in oil well and gas well hydraulic fracturing operations