| 211120 |
Performing oil field services for operators on a contract or fee basis--are classified in Industry 21311, Support Activities for Mining |
| 211120 |
The combined activities of crude petroleum and natural gas extraction--are classified in Industry Group 2111, Oil and Gas Extraction, based on the primary activity of the establishment |
| 211120 |
Refining crude petroleum into refined petroleum and liquid hydrocarbons--are classified in Industry 324110, Petroleum Refineries. |
| 211130 |
Performing gas field services for operators on a contract or fee basis--are classified in Industry 21311, Support Activities for Mining |
| 211130 |
The combined activities of crude petroleum and natural gas extraction--are classified in Industry Group 2111, Oil and Gas Extraction, based on the primary activity of the establishment |
| 211130 |
Manufacturing acyclic and cyclic hydrocarbons from refined petroleum or converting refined petroleum into liquid hydrocarbons (i.e., petrochemicals)--are classified in Industry 325110, Petrochemical Manufacturing |
| 211130 |
Refining crude petroleum into refined petroleum and liquid hydrocarbons--are classified in Industry 324110, Petroleum Refineries |
| 211130 |
Recovering helium from natural gas--are classified in Industry 325120, Industrial Gas Manufacturing. |
| 21211 |
Manufacturing coke oven products in coke oven establishments--are classified in Industry 32419, Other Petroleum and Coal Products Manufacturing |
| 21211 |
Manufacturing coal products in steel mills--are classified in Industry 33111, Iron and Steel Mills and Ferroalloy Manufacturing |