The Oil and Gas Sector can be classified as:
1. Exploration
Companies which explore the depths of earth to locate oil and gas
deposits. This also involves looking under the sea bed.
2. Drilling Oil Wells
Wells of depth of upto 10km below the surface of the earth may have
to be dug for pumping the oil to the surface of the earth. Offshore
wells are called oil rigs.
3. Piping
Oil and Gas may have to piped for long distances from the oil well to
the refinaries. Also post refining, oil and gas may have to pumped
further via pipelines for distribution via road, rail and sea.
4. Refinary
Converts the crude oil and gas into fractions such as petrol,
diesel, naptha, bitumen, etc.