High Precision Measurement Technology of Upward Drilling Depth in Coal Mine
In view of the problem that the existing measurement technology while drilling cannot solve the borehole depth measurement well, a high precision calculation method is proposed for the measurement depth while drilling of rotary drilling rig. This method uses the hydrostatic pressure at the borehole...
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| Үндсэн зохиолч: | |
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| Формат: | Artigo |
| Хэл сонгох: | Chinês |
| Хэвлэсэн: |
Editorial Office of Safety in Coal Mines
2020-07-01
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| Цуврал: | Meikuang Anquan |
| Нөхцлүүд: | |
| Онлайн хандалт: | https://www.mkaqzz.com/cn/article/id/6928 |
| Шошгууд: |
Шошго байхгүй, Энэхүү баримтыг шошголох эхний хүн болох!
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