Performance characteristics of tricone bit: Excellent anti-wear and extreme pressure, impact load can withstand the strongest and from the tricone bit in any direction pressure; High temperature performance, excellent shear stability, can prevent grease in the strong shear stress and high temperature erosion; Good water resistance, when the sealing ring is damaged, tricone bit grease can not because of the water and drilling fluid invasion caused by decomposition and dilution; Good sealing, can prevent all kinds of media intrusion.