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Classe 6

Coiled metal tubing

Classe 7

Machines and machine tools, namely, electric and hydraulic pumps, fuel injectors, engines for machine operation, transmission gears for machines, workover equipment, mudding equipment, namely, mud hopper, mud positive displacement drilling motor, and mud tracers; cement mixers, centrifugal pumps, recirculating mixers, electric drills, electric motors, packers, liner hangers, and landing nipples used in well completions, hydraulic valves, pneumatic valves, wireline formation tester and wireline cutters for well workover and intervention, rotary sidewall coring equipment, material blenders, sand feeders and conveyors, cementing, fracturing and acidizing tools, namely, hydraulic pumps, cement mixers; retainers, plugs, fluid injectors, and gun perforators; valve actuators, couplings, high pressure jetting nozzles; circulating tanks used to pump fluid through the active fluid system, dump bailers for use in placing cement slurry or other materials in a wellbore; perforators for use in perforating oil and gas wells in preparation for production; fluid samplers and filtraton units for use in filtering components of a slurry by leaving the suspended solids and allowing the liquids to pass through, all for use in well drilling and well working

Classe 9

Electronic controls for hydraulic valves and pneumatic valves, nitrogen and carbon dioxide detectors