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| 定向钻进利用钻孔自然弯曲规律或用人工造斜工具,使钻孔在不同的孔段，能按设计的方位和倾角延伸的钻进技术定向钻进，这是一种更精确地向目标方位钻进的技术 | |||
| 定向钻进; 控制角钻进 | |||
| controlled drilling: 24 phrases in 7 subjects |
| Aviation | 1 |
| Drilling | 5 |
| Engineering geology | 1 |
| Management | 1 |
| Oil / petroleum | 4 |
| Shipbuilding | 4 |
| Technology | 8 |
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