7 Parts of machines for oil and gas drilling, production, processing and transportation, namely, christmas trees for oil or natural gas extraction, wellheads, tubing heads, casing heads, tubing hangers, manifolds and risers; riserless and riser-based well access systems composed 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, namely, electrically, hydraulically and electro-hydraulically operated running tools for use in deploying and operating oil and gas drilling, production and processing system components, override jacks, linear actuation override tools, subsea control module override tools, and torque tools, all for the installation, maintenance, workover and intervention of oil and gas wells and oil and gas drilling, production, processing and transportation system components; pumps machines for oil and gas drilling, production, processing and transportation; power operated pneumatic, electric and hydraulic valve actuators; parts of machines for oil and gas drilling, production, processing and transportation systems, namely, flow control valves, chokes, and choke manifolds; parts of machines, namely, power actuated connectors and couplings for oil and gas drilling, production, processing and transportation system components; hydraulic, pneumatic and electro-hydraulic controls for operating oil and gas drilling, production, processing and transportation system components; hydraulic power units; electro-hydraulic power units; separation equipment, namely, cyclone separators, gravity separators, settling tanks, horizontal separators, vertical separators, inline separators, deliquidizers, degassers, phase splitters, demisters, coalescers, desanders, dewaterers, hydrocyclones and flotation units, for separating oil, gas, water and/or solids from well fluids; heat exchangers being parts of machines; hydraulic accumulators being parts of machines; seal assemblies being parts of machines; swivel joints being parts of machines; fluid loading arms being parts of machines