Sinodrills Step Drag Bit
Step drag bit: three wings step drag bit, four wings step drag bit.
Step drag bits diameter: 76mm to 445mm.
Step drag bits thread sizes: 2 3/8" API Reg, 3 1/2" API Reg, 4 1/2" API Reg, 6 5/8" API Reg, etc.
Sinodrills Step Drag Bit
Step drag bit: three wings step drag bit, four wings step drag bit.
Step drag bits diameter: 76mm to 445mm.
Step drag bits thread sizes: 2 3/8" API Reg, 3 1/2" API Reg, 4 1/2" API Reg, 6 5/8" API Reg, etc.
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