42 Consulting about inspection of oil fields; technical consultancy services related to scientific research, engineering, technical studies and design in the fields of oil and natural gas exploration, extraction, compression, refining and distribution facilities; oil and natural gas exploration, 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