- Application: Used for soft formation with low compressive strength and high drill-ability, such as shale, soft limestone, soft sandstone, gravel clay, soft dolomite, salt rock and coal seam, etc.,
- Compressive strength: 80-120 Mpa
- Lug protection (G feature): Hard-metal and wear resistant carbide were applied to shirttail and shirttail lip. The shirttail features a “ terraced design”, which increases escape area and the bailing velocity and decrease cuttings regrind and wear on the bit.
- Bearing structure (SGA): Bearing Type: RollerBall- RollerThrust Button/O ring seal