Oil and gas drilling; oil pumping; oil extraction services; oil well drilling; installation of oil refineries; gas extraction services; information, advisory and consultancy services relating to the aforesaid services

Distribution, storage and delivery of oil and gas; oil and gas supply services; information, advisory and consultancy services relating to the aforesaid services

Scientific and technological research in the fields of oil and gas; surveying, exploration, oil field, natural gas and underwater structure inspection and scientific research services, all in the fields of geology and oceanography; exploration of oil and gas; oil prospecting; exploration of oil fields; inspection of oil fields; surveying oil beds and fields; analysis and testing services in the field of oil exploitation; analysis and testing services in the field of oil exploration; information, advisory and consultancy services relating to the aforesaid services