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| blowout control; hole control; well control | |||
| 井控: 200 phrase in 13 subjects |
| Automobiles | 1 |
| Drilling | 58 |
| Earth sciences | 6 |
| Economy | 1 |
| Engineering geology | 5 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Geology | 1 |
| Geophysics | 12 |
| Mechanics | 5 |
| Mining | 9 |
| Navigation | 4 |
| Oil / petroleum | 79 |
| Technology | 18 |
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