| Group |
Class |
Sub - Class |
Description |
| 111 |
1110 |
|
Extraction of crude petroleum and natural gas [including liquefaction/ regasification of natural gas for purposes of transport and the production, at the mining site, of hydrocarbons from oil or gas field gases ] |
| |
|
11101 |
Off shore extraction of petroleum |
| |
|
11102 |
On shore extraction of petroleum |
| |
|
11103 |
Off shore extraction of natural gas |
| |
|
11104 |
On shore ext raction of natural gas |
| 112 |
1120 |
|
Service activities incidental to oil and gas extraction excluding surveying [ This class includes oil and gas field service activities provided on a fee or contract basis, including: directional drilling; “spudding in”; derrick building; repairing and dismantling; cementing oil and gas well casings; pumping wells; and other service activities. Oil and gas field exploration and geo-physical, geological and seismic surveying are classified in class 7421(Architectural and engineering activities and related technical consultancy)] |
| |
|
11201 |
Services incidental to off shore oil extraction |
| |
|
11202 |
Services incidental to on shore oil extraction |
| |
|
11203 |
Services incidental to off shore gas extraction |
| |
|
11204 |
Services incidental to on shore gas extraction |