HDD Drill Pipe, HDD Drilling Tools, PDC Bits manufacturer / supplier in China, offering Geoter Wuxi Crown Steel Grade S135 Drilling Pipe 6-5/8 Inches Bending Radius HDD Drill Rod Pipe, Diamond Reamer Shell Bq Nq Hq Pq Reaming Shell Suitable for Core Drilling Bit Sizes Geological Drilling, Drill Rig Spare Parts Diamond Nq Hq Core Lifter Core Barrels Assembly Drilling Tools and Equipment on Sale and so on.