Gas control technology of sleeve milling and fishing for directional drilling in broken soft coal seam
Aiming at the technical problem of abnormal gas outflow caused by collapsed holes in the process of directional drilling and sleeve milling in broken-soft coal seams, a gas prevention technology was proposed for directional drilling and sleeve-milling salvage in broken-soft coal seams. On the basis...
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| Huvudupphov: | , , , , , , |
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| Materialtyp: | Artigo |
| Språk: | Chinês |
| Utgiven: |
Editorial Office of Safety in Coal Mines
2024-02-01
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| Serie: | Meikuang Anquan |
| Ämnen: | |
| Länkar: | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20221798 |
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