12 1/4 Oilfield Tricone Rock Roller Cone Drill Bit Beijing Superior Drilling Equipment Co., Ltd. Base Info Customized：CustomizedUsage：Well DrillingTrademark：SuperiorTransport Package：Wooden BoxOrigin：HebeiHS Code：82071910 Description Pre：PDC Bit/Drill Bit/Core Bit/Thermal Stable Polycrystalline Drilling Bit Next：PDC Drill Bit for Oil Water Well Gas Drilling
