Extraction of natural gas

Extraction of natural gas
This class includes:
- production of crude gaseous hydrocarbon (natural gas)
- extraction of condensates
- draining and separation of liquid hydrocarbon fractions
- gas desulphurisation
This class also includes:
- mining of hydrocarbon liquids, obtained through liquefaction or pyrolysis
Extraction of coal mine methane
This class excludes:
- support activities for oil and natural gas extraction, see 09.10
- oil and gas exploration, see 09.10
- recovery of liquefied petroleum gases in the refining of petroleum, see 19.20
- manufacture of industrial gases, see 20.11
- operation of pipelines, see 49.50