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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| Auteur principal: | |
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| Format: | Artigo |
| Langue: | Chinês |
| Publié: |
Editorial Office of Safety in Coal Mines
2020-07-01
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| Collection: | Meikuang Anquan |
| Sujets: | |
| Accès en ligne: | https://www.mkaqzz.com/cn/article/id/6928 |
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