 |
| |||
| combination column; composite column | |||
| collar string; tapered string | |||
| combined casing column; combination string | |||
| комбинированная колонна: 13 phrases in 7 subjects |
| Construction | 1 |
| Drilling | 1 |
| Makarov | 1 |
| Oil / petroleum | 6 |
| Oil and gas technology | 1 |
| Sakhalin | 2 |
| Sakhalin R | 1 |