Optimal and fast drilling technology for multi-branch horizontal grouting well in coal seam floor limestone layer in Zhaogu No. 1 Mine
Taking the actual drilling of multi-branch horizontal grouting wells in coal seam floor limestone layer of the Zhaogu No. 1 mine area as the research object. The well structure is optimized to reduce annulus pressure loss and drilling tool holding pressure, the compound drilling speed is increased...
Uloženo v:
| Hlavní autor: | |
|---|---|
| Médium: | Artigo |
| Jazyk: | Chinês |
| Vydáno: |
Editorial Office of Safety in Coal Mines
2021-10-01
|
| Edice: | Meikuang Anquan |
| Témata: | |
| On-line přístup: | https://www.mkaqzz.com/cn/article/id/7663 |
| Tagy: |
Žádné tagy, Buďte první, kdo vytvoří štítek k tomuto záznamu!
|