Tri-cone Drilling Tools is a type of deceleration drill bit, that is, the rotation speed of the cone is lower than the rotation speed of the drill bit. It is mainly used to scrape broken rocks. It is suitable for sidetracking and deepening of old wells under high speed and high drilling pressure. And other small hole drilling operations play an important role in drilling. The advantages of roller cone bits are: a wide range of applications, not only suitable for side drilling operations, but also can be used in medium and deep wells, showing important advantages in drilling.