Milled Tooth Roller Cone Bit is only for drilling soft rocks or mudstone that combined with sticky composition, TCI ( tungsten carbide inserts ) tricone bits can not drill very soft formations due to slow penetration rate(ROP) and bit-balling.
Milled tooth roller cone bits is mainly used for HDD crossing in mudstone and harder interbed that barrel reamer can not pass through and TCI rock reamer easily being bit-balling.
Specification of Milled Tooth Roller Cone Bits
| Cone Size | 185mm (For building 12 1/4" tricone bit) |
| Bearing Type | Elastomer Sealed Bearing |
| Grease Lubrication | Available |
| Grease Compensation System | Available |
| Gauge Protection | Available |
Operating Parameters
The milled tooth roller cone bit is used for drilling soft formations with low compressive strength and high drillability, such as mudstone, gypsum, salt, soft limestione, etc.