7 Oil, gas, geothermal, water development, and carbon dioxide field equipment, namely, drilling rig mechanization machines and devices consisting of locks, nipples, expandables, cones, flow control devices, isolation valves, liner hangers, couplings, bushings, flotation equipment, centralizer equipment, manifolds, collars, monitoring devices, multilateral devices, packing devices, cables, retainers, stabilizers, hold openers, under reamers, whip stocks, mills, seals, plugs, drill bits, drill stems, drilling motors, drilling machines, drilling hammers, drilling impact tools, milling assemblies, percussion hammers, tongs, tubes, tubing, cutters, swivels, casing and tubing patches, injection equipment, swages, shakers, desanders, desilters, mud cleaning equipment, centrifuges, fluid processing equipment, straddles, spears, half-mule shoes, guide shoes, burn shoes, washover shoes, vacuums, retrieving tools, fishing tools, drilling rigs, bearings for use in drilling machines, rotors used in drilling machines, packers, stators being parts of drilling rigs machines, safety valves, rotating control devices, banding equipment, hangars, screening equipment, sensors, inflow control tools, slicklines, perforating devices, pumps, tubing, pipes, pipe joints, safety joints, accelerators, scrapers, exchangers, casings, cables, gas lifting devices, fluid separators, meters, power and control equipment, boosting equipment, vibration detectors, anchors, imaging equipment, wells, storage devices, tanks, hydraulic equipment, apparatus for the remote observation and operation of oil and gas drilling equipment, flow monitoring devices and thermometers all being devices for use with and part of drilling mechanization machines; pumps for use in irrigation systems; parts of oilfield wellhead machines, namely, chokes, degassers, and centrifuges; power operated pressure control equipment consisting of parts of oilfield wellhead machines, namely, chokes, degassers, centrifugal degassers, hydrogen sulfide mud gas separators, dual mud gas separators for horizontal drilling; rubber and metal mechanical o-ring seals used in equipment for oil and gas exploration and production; cutting machines and machine tools, namely, powered machines for cutting or shaping or finishing metals or other materials; precision machine tools, namely, hard metal tools, high speed steel (HSS) tools, carbide tools, ceramic tools, poly crystalline diamond (PCD) tools, and diamond-coated and diamond-uncoated tools, and hard metal tools, all for use in the cutting and forming of material by others; mechanical seals; air-operated power tools, namely, drills, grinders, and millers; drills for the mining industry; electric drills; pneumatic drills; power drills; power tools, namely, reamers; electric welding machines; laser welding machines; friction-stir welding tools; friction-stir welding machines; bits for mining machines; bits for power drills; core drilling bits; mining bits; tool bits for machines; bearings, as parts of machines; roller bearings for machines; pump diaphragms; machines, namely, cementing equipment used in oil and gas exploration and production