Cutting Structure

Unique steel tooth structure effectively improving the wearing resistance of the teeth and greatly increasing the rate of penetration.

Gauge Structure

Enhanced gauge protection with hard facing on the shirttail, strengthened leg with special insert tungsten carbide. 

Bearing Structure

High precision journal bearing, hard faced bearing surface. Cone bearing inlaid with friction reducing alloy and then silver-plated, made the rotating more stability, safety and durability. 

Seal and Lubrication

Patented unique metal seal can enhance the seal performance, it has longer durability than the rubber seal. The compensation bearing grease system greatly increase the lubricating reliability and improve the bearing life effectively. 

Applications

Very soft formations with low compressive strength, such as shale/clay/ sand stone/soft limestone. etc.