Drilling Rig, Drill Bits, DTH Drill Rig manufacturer / supplier in China, offering Df400 6X4 Truck Type Geothermal Well Drilling Rig, 6” PDC Bit Geothermal Oil &Well Use Carbide Borehore Rock Drill Bit, 16” PDC Bit Geothermal Oil &Well Use Carbide Borehore Rock Drill Bit and so on.