7 Parts of machines for oil and gas drilling, production, processing and transportation systems, namely, christmas trees, wellheads, tubing hangers, tree caps, manifolds and risers; riserless and riser-based well access systems comprised of risers, tension frames, slick joints, telescopic joints, stress joints, tension joints, surface flow trees, circulation heads, lubricator valves, retainer valves, lubricators, upper lubricator packages, lower lubricator packages, lubricator tubulars, pressure control heads, well control packages, lower circulation modules, chemical injection units, subsea test trees, landing strings, landing string accumulator modules, running tools, emergency disconnect packages, workover control modules, hydraulic power units, hydraulic distribution units, control panels, umbilicals and umbilical reels, for oil and gas drilling, production, processing and transportation systems; landing strings being parts of machines; power operated tools for the installation, maintenance, workover and intervention of oil and gas wells and oil and gas drilling, production, processing and transportation system components; parts of machines for oil and gas drilling, production, processing and transportation systems, namely, flow control valves and chokes; power operated pneumatic, electric and hydraulic valve actuators; pumps being machines for oil and gas drilling, production, processing and transportation; couplings for machines, namely, power actuated connectors and couplings for oil and gas drilling, production, processing and transportation system components; electric, hydraulic and electro-hydraulic controls for operating oil and gas drilling, production, processing and transportation system components; umbilicals, namely, assemblies of electrical power cables, data transmission cables and flexible fluid conduits