7 Oil, gas, geothermal, water development, and carbon dioxide field equipment, namely, drilling rig mechanization machines and devices; structural and replacement parts for drilling rig mechanization machines, namely, locks, nipples, expandables, cones, isolation valves, liner hangers, couplings, bushings, manifolds, collars, cables, retainers, stabilizers, hold openers, mills, seals, plugs, drill bits, drill stems, tubes, tubing, swivels, half-mule shoes, guide shoes, burn shoes, washover shoes, drilling machine bearings, drilling machine rotors, packers, stators being parts of drilling rigs machines, safety valves, hangars, slicklines, pumps, tubing, pipes, pipe joints, safety joints, casings, and cables; devices adapted for use with drilling rig mechanization machines, namely, flow control devices, gas flotation machine, toolstring centralizer, casing centralizer, liner centralizer, logging device centralizer, bow-spring centralizer, monitoring devices, multilateral devices, packing devices, hold openers, under reamers, whip stocks, drilling motors, drilling machines, drilling hammers, drilling impact tools, milling assemblies, percussion hammers, tongs, cutters, casing and tubing patches, injection pump, injection mandrel, injection line, injection swages, shakers, desanders, desilters, mud cleaner, shale shaker, vacuum degasser, decanter centrifuge, mud agitator, mud tank, centrifugal pump, mixing hopper, mud gas separator centrifuges, heat exchanger, compressor, air coolers, evaporators, batch reactor, continuous reactor, tubular furnace, boiler, pumps, dust collectors, wet scrubber, fabric filter, settling chamber, precipitator, oil treater, straddles, spears, vacuums, retrieving tools, fishing tools, drilling rigs, packers, rotating control devices, banding tool, hangars, reservoir screening machine, surface well screening machines, sensors, inflow control tools, slicklines, perforating devices, accelerators, scrapers, exchangers, gas lifting devices, fluid separators, meters, motors, accumulator, steerable motor, mud motor, generators, actuators, wellhead control panels, flowheads, machines for subsea boosting, booster pump, pump station, suction anchor, mud mat, hydraulic booster, vibration detectors, anchors, machines for borehole imaging, machines for seismic imaging, electromagnetic pipe scanner, wells, storage devices, tanks, hydraulic power units, machines for delivering hydraulic pressure and flow, hydraulic pumping units, hydraulic control system, hydraulic actuator, hydraulic booster, and apparatus for the remote observation and operation of oil and gas drilling rigs, 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; machine parts, namely, 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 power drills; pneumatic hand-held drills; power drills; power tools, namely, reamers; electric welding machines; laser welding machines; friction-stir welding tools, namely, welding torches; electric welding machines, namely, 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 in the nature of skid-mounted cementing units, batch mixers, liquid additive systems, mechanical cement slurry defoamer, subsea cementing head, casing packer, isolation packer, and solids fraction monitor used in oil and gas exploration and production ; laser welding machines; electrodes for welding machines; electrical power generators using geothermal power; electrolysis machines for production of hydrogen gas; and machines for lithium mining; wireline tractors used in oil and gas exploration and production