SINODRILLS Step 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. Step drag bits are usually used for drilling overdurdens with sands, clays or soft formations. Compared with chevron drag bits, step drag bits produce large cuttings and more aggressive, however, will be less durable. 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