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Blowing engines, except for land vehicles; oil and natural gas drilling rigs; semi-submersible drilling rigs; drilling ships, not in the nature of vessels; jack-up drilling rigs; semi-tender drilling rigs; tender drilling rigs; derricks; machines, namely, industrial robots; lifting and hoisting apparatus, namely, cranes; oil refining machines; hydraulic and pneumatic controls for machines and engines

Well construction; repair and installation services related to blowing engines, oil and natural gas drilling machines, oil and natural gas drilling rigs, semi-submersible rigs, drilling ships, jack-up rigs, semi-tender rigs, tender rigs, derricks, machines, namely, industrial robots, lifting and hoisting apparatus, namely, cranes, oil refining machines, hydraulic and pneumatic controls for machines and engines; drilling of wells for exploitation of oil and natural gas

Scientific and technological services and research and design related to oil and natural gas exploration and production; industrial analysis for oil-field exploitation and scientific research services; scientific and chemical analysis for oil-field exploitation; oil-well testing; geological surveys; engineering services; oil-field surveys; oil exploration