Class 037
Construction and Repair Services
Drilling of deep oil or gas wells
Class 039
Transportation & Storage Services
Storage of gas; Distribution of energy; Distribution of gas; Gas distribution services; Oil distribution services
Class 040
Treatment & Processing of Materials Services
Gas processing and treatment; Gas processing services; Processing of gas; Processing of oil; Refining; Refining of gas; Refining of oil; Refining of petroleum products; Refining services
Class 042
Computer & Software Services & Scientific Services
Gas, oil, petroleum, minerals exploration (prospecting)