Roller Cone IADC617 8 1/2′′ Beijing Superior Drilling Equipment Co., Ltd. Base Info Model NO.：Single Roller Cone IADC617 8 1,2′′Superior Drilling Tools：Superior Roller ConeTrademark：superiorTransport Package：Wooden CaseSpecification：accordinglyOrigin：Hejian, China Description Pre：42" Rock Reamer for HDD Horizontal Directional Drilling Next：Milled Tooth Tricone Bit 5 7/8′′ for Water Well Drilling
