37 Drilling of oil and gas wells; consultancy, information and advisory services relating to drilling of oil and gas wells; pumping and extraction of oil; drilling and extraction of gas; consultancy, information and advisory services relating to pumping and extraction of oil; consultancy, information and advisory services relating to drilling and extraction of gas; construction of structures for the production, shipping, transportation, storage of oil and gas, namely, oil processing plants, gas processing plants, oil pipelines, gas pipeline, oil wells, gas wells, oil tanks, gas tanks, oil separators, gas separators, oil rigs, gas rigs, oil platforms and gas platforms; consultancy, information and advisory services relating to construction of structures for the production, shipping, transportation, storage of oil and gas, namely, oil processing plants, gas processing plants, oil pipelines, gas pipeline, oil wells, gas wells, oil tanks, gas tanks, oil separators, gas separators, oil rigs, gas rigs, oil platforms and gas platforms; repair or maintenance of oil and gas processing plants; consultancy, information and advisory services relating to repair or maintenance of oil and gas processing plants; repair or maintenance of oil pipeline and gas pipeline; consultancy, information and advisory services relating to repair or maintenance of oil pipeline and gas pipeline; repair or maintenance of oil and gas plants, namely, repair or maintenance of oil wells, gas wells, oil tanks, gas tanks, oil separators, gas separators, oil rigs, gas rigs, oil platforms and gas platforms associated with oil and gas processing; consultancy, information and advisory services relating to repair or maintenance of oil and gas plants, namely, repair or maintenance of oil wells, gas wells, oil tanks, gas tanks, oil separators, gas separators, oil rigs, gas rigs, oil platforms and gas platforms associated with oil and gas processing plants