No.Dia(mm)materialTorqueDepthDrilling rigBorehole diameter1Ø34DZ502000N.m100mZQJC-160~1000  ZDY-400 ZDY-650hydraulic drilling rig55mm2Ø42DZ503000N.m100m65mm,Website: ,75mm3Ø50DZ505000N.m100m75mm4Ø63.5R7808000N.m100mZDY-190094mm5Ø73R78010000N.m100mZDY-320094mm6Ø89R78012000N.m100mZDY-4000108mmNote: We also can produce and design as per clients’ drawings/samples/requirementsprismatic drill rod is refers to Coal Mine  Roadway Drilling with triangular pyramid type drill pipe, referred to as the  three edged drill pipe, the triangular drill pipe, anti sloughing hole drill  pipe, ABS pipe, is in a conical transition triangular arc steel for drill rod  and thread form or triangular, square, hexagon connection form of drill pipe  joints, friction welding made the coal mine drilling drill, prismatic drill rod  pipe is widely used in the coal seam and near coal seam geological conditions of  drilling, coal mine water and gas drainage borehole construction, and can also  be used in geophysical prospecting and construction of water conservancy  engineering anchor and drilling field.prismatic drill rod series products is in recent years, our company have developed with independent intellectual property rights of patent product, won a number of national patents, respectively is: a triangular pyramid type drill pipe (ZL201120359764.1) Coal Mine Roadway  Drilling, a coal mine tunnel drilling triangular hexagonal fast connecting rod device (ZL201320193491.7),a coal mine tunnel  drilling thrust slag spiral drill pipe (ZL201320493681.0)