89mm stepped 3 wings Drag Drill Bit 3 1/2 inch for drill pipe 76mm

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Changsha Sollroc Engineering Equipments Co., Ltd

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89mm stepped 3 wings Drag Drill Bit 3 1/2 inch for drill pipe 76mm

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89mm stepped 3 wings Drag Drill Bit 3 1/2 inch for drill pipe 76mm

89mm stepped 3 wings Drag Drill Bit 3 1/2 inch for drill pipe 76mm drag bit is a drill bit usually designed for use in soft formations such as sand, clay, or some soft rock. However, they will not ...

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