Underwater installations for the purification, separation, filtration, cleaning and scrubbing of oil, gas, petroleum or petroleum fractions; installations for separation, purification, cleaning and re-evaporating hydrocarbons, gas, petroleum or petroleum fractions, refinery gases and methane; refining towers for distillations of mixtures of liquid and gaseous hydrocarbon; reactors being industrial chemical installations for synthetic gases and artificial methane; reactors being industrial chemical installations; reactors being industrial chemical installations for fertilizers; reactors being industrial chemical installations for chemical additives for fuels

Construction, construction supervision, installation, repair, modification, maintenance services of industrial plants and infrastructure to produce, refine, conduct, storing, transporting and distributing fluids and liquids, in particular water, hydrocarbons, petroleum, gas, natural and refined gas, liquid gas and chemicals; construction, construction supervision, installation, repair, modification, maintenance services of petrochemical plants, chemical installations, distribution networks for the transport of fluids, liquids and fuels, in particular water, hydrocarbons, petroleum, natural and refined gas, gas and liquid gas, or fuel gas, gaseous mixtures of fuels; installation of environmental engineering systems; construction, repair, modification and maintenance services of installations for the production, storage and transport of energy; construction, repair, modification and maintenance services of installations for the production of fertilizer; construction of onshore and offshore wells for exploration and production of oil and gas fields or for geothermal power; construction, construction supervision of floating means in the nature of barges, semisubs, vessels and platforms, boats or subsea means in the nature of submarines, AUT (autonomous underwater vehicles), ROV (Remotely Operated Vehicles) and subsea packages and modules; construction, construction supervision of railways, rail networks and infrastructure in the nature of railways, railroads, bridges, tunnels, viaducts, overpasses and underpasses for the transport of people and goods by rail; construction, construction supervision of marine, lake and river infrastructure in the nature of bridges, harbors, jetties, weirs, dams; construction, installation and maintenance of subsea factories and subsea equipment for extracting and processing oil and natural gas; construction, installation and maintenance of offshore equipments, infrastructures and installations for the production of energy; remote operated vehicles (ROV) maintenance and remote operated vehicles (ROV) upgrading services; maintenance of subsea machines and equipment; trenching and ploughing services, excavation and seabed preparation services for pipelines and for subsea installations; remote operated vehicles (ROV) services, namely installation and laying of pipelines and construction of subsea installations incorporating use of ROV's; inspection, maintenance and repair services of offshore and subsea equipments, infrastructures and plants in the nature of pipelines, platforms and subsea structures, subsea packages and modules; pipeline, platform and subsea structures decommissioning

Scientific and technological services, namely, engineering and design services of facilities and installations for the production, processing, transport and supplying of water, hydrocarbons, petroleum, natural gas, refinery gases, gas, liquid gas, of chemical and petrochemical installations, of oil or gas well and of oil or gas fields, including on-shore, marine or offshore oil or gas wells and oil or gas fields; engineering and design services of facilities and installations for the production, processing, transport and supplying of water, hydrocarbons, petroleum, natural gas, refinery gases, gas, liquid gas, of chemical and petrochemical installations, of oil or gas well and of oil or gas fields, including on-shore, marine or offshore oil or gas wells and oil or gas fields; scientific and technological services and research in the fields of extraction, production, refining and processing of water, hydrocarbons, petroleum, natural gas, refinery gases, gas, liquid gas and chemicals; exploration of water, petroleum and natural gas; technical measuring and testing laboratory services relating to water, oil and gas wells; scientific and technological services and research in the fields of reclamation of areas, installation and/or industrial processes; design services of railways, rail networks and infrastructure for the transport of people and goods; engineering services, design and development of installations, equipment and plants for generating, storing and transporting energy; design services of railway and transport of people and goods; engineering, design and development services of floating and underwater means in the nature of barges, semisubs, vessels and platforms and of submarines, AUT (autonomous underwater vehicles), ROV (Remotely Operated Vehicles) and subsea packages and modules; engineering, design and development services of marine, lake and river infrastructure in the nature of bridges, harbors, jetties, weirs, dams; testing of offshore and subsea equipments, infrastructures and plants; scientific and technological services and research in the field of offshore and subsea equipment, infrastructures and plants; engineering for subsea factories, subsea infrastructures and plants and related subsea equipment