Categories: Mill Tooth Tricone Bit, Vertical Drilling Series
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| RPM(r/min) | 150-60 | ||
| WOB(KN) | 54-147 | ||
| Formations | Medium formations with high compressive strength, such as medium-soft shale, hard gypsum, medium-soft limestone, medium-soft sandstone, soft formation with harder interbeds, etc. | ||
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