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6
Common metals and their alloys; metal building materials; transportable buildings of metal; materials of metal for railway tracks; non-electric cables and wires of common metal; ironmongery, small items of metal hardware; pipes and tubes of metal; safes; goods of common metal not included in other classes; ores.
metallic equipment in the nature of metal hardware for use in oil and gas exploration, completion, and production, namely, slickline wire, drill pipe, casing, tubing, valves not being parts of machines; metal pipe collars specially adapted to protect threads of oil pipe
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7
Machines and machine tools; motors and engines (except for land vehicles); machine coupling and transmission components (except for land vehicles); agricultural implements other than hand-operated; incubators for eggs.
machines and tools for use in oil and gas exploration, completion, and production, namely, metallic and non-metallic casing centralizers, metallic and non-metallic tubing centralizers, metallic and non-metallic packers, metallic and non-metallic frac balls and frac plugs, metallic and non-metallic power drill bits and drill bit cutters, fluid pumps and separators, drilling rigs and workover rigs in the nature of drilling rigs, torque converters, other than for land vehicles and drag-line excavator tools, friction reduction tools in the nature of pumps for tools, artificial lift systems in the nature of springs being parts of machines, solid control equipment in the nature of centrifuges, wireline cable heads and related equipment in the nature of winches, drill guides for protecting oilfield pipes, metallic liner hangers, metallic float shoes and float collars, metallic stop collars, metallic casing collars, metallic scrapers, metallic toe sleeves, metallic sliding sleeves, metallic vibration tools, metallic wellhead machines in the nature of gate valves, metallic frac stacks in the nature of valves as machine components, metallic fishing tools for locating stray drilling equipment, metallic power drill bits and drill bit cutters
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9
Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; automatic vending machines and mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus.
apparatus for use in oil and gas exploration, completion, and production, namely, downhole sensors and tool measuring instruments, logging tools in the nature of electronic data loggers, wireline tools in the nature of extension cables; downloadable computer software for use in petroleum exploration and production, namely, well modeling and projection, torque modeling, drag modeling, friction modeling, drilling measurement, centralizer placement modeling, and hydraulic modeling
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13
Firearms; ammunition and projectiles; explosives; fireworks.
explosives for use in oil and gas exploration, completion, and production, namely, perforating tools in the nature of shaped charges
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42
Scientific and technological services and research and design relating thereto; industrial analysis and research services; design and development of computer hardware and software
oil and gas exploration services, namely, measurement and downhole telemetry services while drilling, geophysical exploration, computer modeling, and technical consulting for same; engineering services in connection with the custom design, manufacture, and application of specialized downhole tools