Laying, repair, maintenance, replacement and refurbishment of pipelines; repair of roads and paths; construction, repair and maintenance of gas installations; the construction, repair and maintenance of energy-using installations; installation of insulating materials, drilling of wells, exploitation and extraction of oil and gas, oil and gas drilling, oil pumping and extraction; underwater construction; demolition; building construction services; obtaining hydrocarbons such as natural gas and crude petroleum from below ground such as from oil fields; installation, repair and maintenance of gas compressors; land development

Storage, distribution, transportation, shipping, and delivery of gas, liquefied natural gas, gaseous fuels and oils; transmission and/or distribution and/or supply of electricity and other energy sources; underwater diving services; transportation of waste

Generation of power; generation of electricity; processing of hydrocarbons; disposal of waste

Scientific, engineering and environmental research and development services; geophysical and geological surveys services; exploration and production of gas and oil; underwater exploration and production of gas and oil; surveying; testing pipework, apparatus and instruments using gas; inspection of pipelines