37
Construction services including drilling and laying of oil and natural gas pipelines; drilling of oil wells; construction of oil and natural gas processing and compression facilities; construction of oil and natural gas distribution facilities; automobile service station services for oil changes, alignments, general repair and maintenance; contracting and consultancy services related to scientific technical, engineering and project management, technical studies, design, construction, maintenance and repair of all kinds of works and buildings, procurement, inspection, expediting, and management of construction relating to oil and natural gas exploration, extraction, compression, refining and distribution facilities
39
Operation of oil and natural gas processing and compression facilities; operation of oil and natural gas pipelines for transportation or transmission of natural gas; operation of oil and natural gas distribution facilities; operation of transport facilities for oil and natural gas; electricity distribution, distribution of gas, arrangement of the distribution of hydrocarbons
40
Natural Gas and fuel refining services including refining, treatment and processing of oil, natural gas and fuel; generation of electricity
42
Oil and natural gas exploration and production, exploration of hydrocarbons, oil and natural gas well surveying, oil and natural gas prospecting, oil and natural gas well testing services, analysis for oil and natural gas field exploitation, geological, geophysical or any other kind of surveys for exploration and prospecting for oil and natural gas