Size Range: 4" - 26"

The dual - diameter drill bit is widely applied in numerous fields such as industrial drilling and geological exploration. Its most prominent feature is that it has two - diameter drill body parts. The PDC teeth distributed on each blade wing enhance the overall performance of the drill bit. Compared with traditional PDC drill bits, concentric dual - diameter drill bits can reduce the stress of the rock around the wellbore. This gives them the advantage of increasing the mechanical drilling speed in difficult - to - drill formations. Moreover, this drill bit can eliminate the "stick - slip" phenomenon of PDC drill bits, protecting the main cutting structure and shoulder - cutting teeth of the drill bit and thus extending the drill bit's service life.