07
Drilling rigs, floating or non-floating; oil drilling rigs;
oil drilling machine tools; parts and accessories for the
foregoing
37
Contractor operations, namely construction in the oil and
gas sector, and rental of tools for drilling oil and gas
wells; installation, operation and maintenance of drilling
equipment in oil and gas installations; oil and gas
drilling; drilling of deep oil or gas wells; extraction of
oil; pipeline construction and maintenance; oil drilling;
rental of oil well drilling tools; drilling rig rental;
power infrastructure construction; maintenance and repair of
energy generating installations; construction of wind power
plants; installation of wind power systems; maintenance and
repair of wind power plants; erection, installation,
maintenance and repair of windmills, wind power plants, wind
turbines and other wind-operated machines
40
Oil and gas well treatment; processing of gas and oil;
processing and transforming of energy; production of
electrical power from renewable sources; generation of
electrical energy from wave, wind and solar sources; rental
of power-generating equipment; leasing of energy generating
equipment; rental of energy generating equipment; generation
of electricity from wind energy; generation of electricity
from wave energy; generation of electricity from solar
energy
42
Exploration services in the field of the oil, gas and mining
industries; oil-field surveys; oil prospecting; oil-well
logging and testing; surveying of oil beds and fields;
oil-well testing; analysis for oil-field exploitation;
analysis and testing services for the oil industry;
technological consultancy and engineering services relating
to oil and gas drilling; development of energy and power
management systems; technological consultancy in the fields
of energy production and use; research in the field of
energy; engineering services relating to energy supply
systems; technological consulting services in the field of
alternative energy generation; engineering services;
engineering services in the field of electrical power and
natural gas production
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