Class 037
Construction and Repair Services
Developing of natural gas wells by drilling of gas wells; extraction of natural gas
Class 039
Transportation & Storage Services
Business management services related to the operation of oil and gas field installations, to the processing of oil and gas, and to the distribution of oil and gas
Class 040
Treatment & Processing of Materials Services
Natural gas; liquid natural gas; liquefied natural gas; petroleum gas; liquid petroleum gas; crude oil
Class 042
Computer & Software Services & Scientific Services
Oil and gas exploration and prospecting services, analysis for oil and gas exploration services, oil and gas field surveying, oil and gas well testing; natural gas well exploration