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Formation | IADC | Lithology | Bits Selection |
Very Soft | M121/S121 M122/S122 | Clay, Sandstone, Siltstone | M/S316*F, M/S416*F, /S419*F M/S516*F, M/S519*F |
Soft | M221/S221 M222/S222 | Sandstone, Shale, Marlstone | M/S416*F, M/S519*F, M/S516*F |
Medium | M322/S322 M323/S323 | Limestone, Sandstone, Conglomerate | M/S516*F, M/S519*F, M/S619*F |


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