|
| 2200 | Bituminous sand digging | |
| 2200 | Bituminous sand operations, including crude oil extraction | |
| 2200 | Crude petroleum desilting | |
| 2200 | Crude petroleum emulsion breaking | |
| 2200 | Cycle plant operation | |
| 2200 | Gas and oil well, cutting and pulling casings, tubes and rods, except contract services | |
| 2200 | Gas well | |
| 2200 | Gas well surveying, except contract services | |
| 2200 | Grading and building foundations at oil well locations, except contract services | |
| 2200 | Natural gas extraction | |
| 2200 | Natural gas well operations | |
| 2200 | Oil and gas well, cutting casings, tubes and rods, except contract services | |
| 2200 | Oil and gas well, pulling casings, tubes and rods, except contract services | |
| 2200 | Oil extracting from shale or sand, operations not including refining | |
| 2200 | Oil sand digging | |
| 2200 | Oil shale digging | |
| 2200 | Oil shale operations, including crude oil extraction | |
| 2200 | Oil well | |
| 2200 | Oil well operations | |
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