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.

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

Specification of Milled Tooth Roller Cone Bits

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.