SINODRILLS Chevron drag bits   Drag bits are economical tools when drilling softer geological formations and shallower depths. Sinodrills is the biggest supplier of drag bits in China, we supply both step drag bits and chevron drag bits. Chevron drag bits are usually used for drilling more abrasive formations like soft sandstons and shales. Chevron drag bits are more durable than step drag bits because of cutting structuer, but penetrate more slowly. We offer a comprehensive range of step drag bits as below: Drag bits diameters: 3 7/8” ~ 26”; Connection threads: N-Rod, AW, 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; Sinodrills drag bits features: 1, All drag bits blades originate from high quality of heat treated alloy steel forgings.; 2, Carbide inserts are individually brazed using 50% nickel silver alloy; 3, Use high grade carbide inserts only; 4, All drag bits are biult to the gauge tolerances.