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Nullam dignissim, ante scelerisque the is euismod fermentum odio sem semper the is erat, a feugiat leo urna eget eros. Duis Aenean a imperdiet risus.
Stable performance after 38 meters of drilling in fractured limestone with hard quartz interlayers
Case Summary
| Item | Details | Item | Details |
| Mine type | Vertical shaft | Bit model | φ32 two-wing PDC anchor bit |
| Equipment | MQT-130 | Cooling method | Water cooling |
| Rock type | Limestone | Rock condition | Fractured, with local hard quartz interlayers |
| Rock hardness | f=9 | Drilling pressure | 0.6 MPa |
| Rotation speed | 180 r/min | Total footage | 38 m |
| Completed holes | 4 × 6.2 m cable anchor holes | Completed holes | 11 × 1.2 m anchor holes |
| Before Use | After Field Use |
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| Before use: unused φ32 two-wing PDC anchor bit, showing the original cutting structure and wing profile. | After field use: our product after 38m drilling in f=9 fractured limestone with hard quartz interlayers. The bit shows stable structure, controlled wear, and no obvious large-area structural failure. |
In an f=9 fractured limestone formation with hard quartz interlayers, our φ32 two-wing PDC anchor bit delivered 38 m of stable drilling performance while maintaining strong structural integrity and controlled wear after field use.
