CROWN

Manually operated metal valves for use in the oil and gas, storage, cavern, and thermal wells to regulate the flow of fluid, namely, gate valves, check valves, and pipeline valves; metal hardware items for use in wellheads, namely, casing heads, casing spools, casing hangers, tubing heads, tubing hangers, crosses and tees, casing caps, and primary and secondary packoffs; metal hardware items for use in wellheads, namely, adapter spools, tubing head adapters, top connectors, and tree assemblies; metal hardware items for use in wellheads and valves, namely, nuts; metal test plugs for use in wellhead equipment; metal flanges

Wellheads in the nature of machinery for use in oil and gas, storage, cavern, and thermal wells; valves in the nature of machinery to regulate the flow of fluid, namely, gate valves, check valves, and pipeline valves; parts of wellhead machinery, namely, primary and secondary packoffs in the nature of a seal for a wellhead, o-rings; lubricators, namely, a hydraulically or mechanically operated tool mounted at the top of a wellhead and used to install or remove wellhead parts in a high pressure wellhead; all the aforesaid being machines or parts of machines

Christmas trees in the nature of an assembly of valves, spools, and fittings, affixed to a wellhead to control well production or injection through the use of pressure sensors and pressure gauges, for use in oil and gas, storage, cavern, and thermal wells; surface safety valves for use in oil and gas, storage, cavern, and thermal wells; electric surface and subsurface safety valve control panels; automatic valves for use in oil and gas, storage, cavern, and thermal wells, namely, gate valves, check valves, and pipeline valves for safety use; emergency shut down valves for automatic or remote flow shutoff to control pressure and to maintain safe conditions for use in oil and gas, storage, cavern, and thermal wells; control panels used to monitor, operate and control the flow and pressure in equipment, for use in oil and gas, storage, cavern, and thermal wells

Installation, repair and maintenance of equipment, machinery, and parts thereto, for oil and gas, storage, cavern, and thermal wells