 |
| cased hole: 105 phrases in 17 subjects |
| Construction | 1 |
| Drilling | 22 |
| Ecology | 1 |
| Electronics | 1 |
| Facilities | 2 |
| General | 3 |
| Geology | 1 |
| Geophysics | 7 |
| Mining | 1 |
| Oil / petroleum | 16 |
| Oil and gas | 27 |
| Oil and gas technology | 5 |
| Oilfields | 5 |
| Production | 1 |
| Sakhalin | 3 |
| Sakhalin R | 1 |
| Technology | 8 |