Low speed grinding and hang sidetracking branch technology for near horizontal directional hole in coal mine
The branch hole is the key to ensure the long-distance drilling of directional hole along the target stratum, improve the coverage of directional drilling and accurately explore geological abnormal bodies. The principle, advantages and disadvantages of the main sidetracking branch technology in coa...
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| Формат: | Artigo |
| Мова: | Chinês |
| Опубліковано: |
Editorial Office of Safety in Coal Mines
2022-05-01
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| Серія: | Meikuang Anquan |
| Предмети: | |
| Онлайн доступ: | https://www.mkaqzz.com/cn/article/id/7945 |
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