Chevron drag bits

Chevron drag bits are usually used for drilling more abrasive formations like soft sandstons and shales. It is more durable than step drag bits because of cutting structuer. Drag bits diameters: 3 7/8” ~ 16”; Connection threads: 2 3/8’’ API Reg, 2 7/8’’ API Reg, 3 1/2’’ API Reg, 4 1/2’’ API Reg, 6 5/8’’ API Reg, 2 7/8’’ API IF, etc. Wings: Three wings, four wings;