API Single Cone Bit for Oil Well Drilling

Cone bit as a drilling rock tools have been widely applied, significant improvement in bit performance directly reduce drilling cost, especially in the past ten years the fastest progress. Service life and drilling rate two performance indexes, which ultimately determine the degree of influence of the drill bit drilling cost. Improving bit drilling speed and long service life is an effective way to reduce drilling cost, data confirmed, improve drilling speed ratio improved bit life to reduce drilling cost more, the improvement of bit cutting structure is improving bit drilling speed is the most direct method. For a long time, improvement of the cutting structure are mainly concentrated on the main cutting tooth structure, such as tooth structure of carbide, people have invented the wedge-shaped teeth, the tooth, the tooth, partial top worn teeth etc...In recent ten years, people have gradually realized that the gauge structure also has a great effect on the bit rate and life, especially in highly deviated and horizontal wells application requirements with reasonable structure of the drill diameter, diameter structure of many new insurance has been developed and applied to the roller cone bit and achieved good results.