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| rotary rock bit (Yeldar Azanbayev) | |||
| wire-line bit | |||
| rotary drill bit | |||
| rotary-drill bit | |||
| долото вращательного бурения: 19 phrases in 9 subjects |
| Drilling | 1 |
| Geology | 3 |
| Makarov | 1 |
| Mining | 1 |
| Oil / petroleum | 3 |
| Oil and gas | 1 |
| Oil and gas technology | 4 |
| Oilfields | 4 |
| Technology | 1 |