Machines, fabricated structures, tools and replacement parts therefore for use in the production of oil and gas from wells and for the drilling of oil and gas wells; rig structures, including derricks, masts, platforms, work-over rigs, self-propelled rigs, trailerized rigs, skidding systems, rig jacks, spiders, substructures, operator cabins, blowout preventer handling systems, wireline units, power generation and transmission equipment, including generators, motors, power distribution systems, torque converters, and hydraulic power packs; hoisting equipment, including drawworks, sheaves, travelling blocks, crown blocks, catheads, winches, deadline/wireline anchors, brakes, swivels, winches, fairleads, windlasses, hooks, elevators, cranes, level winds, chain links and lift chains; pumping equipment, including standpipes, goosenecks, risers, pumps, pump pistons, pump liners, valve seats, valves, blenders, cement pumpers, acid pumpers, combination cementer/acidizers, cement batch mixers, injectors, sucker rods, frac blending units, nitrogen pumping equipment, cryogenic pumps, slush pumps, well service pumps, plunger pumps, mud pumps, positive displacement pumps, and centrifugal pumps; pipe handling equipment, including elevators, slips, pipe rackers, tongs, wrenches, pipe spinners, iron roughnecks, breakout machines, bumper subs, cranes, dies, inserts, claws, grippers, elevators, power slips, thread protectors, cam rollers, mechanical arms, stabbing baskets, and pipe racks; solids control equipment, including shakers, desilters, desanders, degassers, centrifuges, mud cleaners, cones, mud agitators, mud hoppers, mud guns, mud mixers, mixers, dryers, compressors, separators, screens, cuttings cleaners, conditioning units, filters, clarifiers, sand washers, and hydrocyclones; pressure control equipment, including valves, blowout preventers, chokes, diverters, pressure control valves, safety clamps and valves, relief valves, float valves, gate valves, choke manifolds, flanges, and actuators; rotating equipment, including top drives, swivels, power swivels, kelly drives, rotary tables, bushings, and fluid driven motors; motion compensation equipment, including crown mounted compensators, drill string compensators, riser tensioners, and riser gimbals; well tools, including downhole motors, drilling jars, fishing tools, reamers, shock tools, drill collars, stabilizers, wellheads, valves for wellheads, pipes and pipelines, tool joints, connectors, running tools, tubing and casing threads, casing hangers, casing scrapers, mudline hangers and connectors, packers, plugs, nipples, flow meters, coiled tubing units, tubing hangers, tubing heads, tubing reels, injectors, carriers, tubing grippers, grippers, wireline components, rods, couplers, intervention tools, completion tools; computer controlled pipe hoisting and racking equipment

Electronic instrumentation and controls for monitoring and displaying data associated with the drilling of oil and gas wells and the production of oil and gas from wells; instrument control panels, instrument control consoles, instrument control circuits, indicators, gauges, meters, data processors, computer controlled drilling equipment augmented to log key well drilling parameters and communicate electronically, rig activity recorders, electronic fluid control and recovery equipment, blow out preventers, regulators, pressure gauges, subterranenean and subsea production equipment controllers and components thereof, hydraulic load sensing and indicating systems comprised of dial indicators, load totalizers, load sensing cells, well testing units, and automatically operated gas valves; electronic, magnetic and ultrasonic instruments and apparatus, as well as computer hardware and software, for inspecting, measuring, analysing, surveying, testing, tracking, inventorying, and locating pipelines, drill pipe, tubing, casing line pipe, joints, and other tubular goods; computer hardware and software for providing information and data about the functions, processes, and operations of drilling rig equipment and for enabling rig personnel to manage, monitor, and control the functions, processes, and operations of equipment in the drilling of oil and gas wells and the production of oil and gas from wells; silicone control rectifier (SCR) electrical units for converting AC to DC, electric generators, electric motors, permanent magnet motors, power distribution equipment, including switches, circuit breakers, transformers, control panels, computers and instrumentation for controlling the distribution of electrical power; instrumentation, inspection, and control equipment, including control panels, pipe inspection equipment, and pressure sensors