Research and Design of the ZRJ20-400/300 Emulsion Drilling Rig

According to drilling capacity deficiency and handling inconvenience of Small hydraulic drill for coal mine,Chongqing Institute of China Coal Technology and Engineering Group have developed ZRJ20-400/300 emulsion drilling rig.Rig main parameter design,the overall design of the scheme,the design features of the hydraulic system and rig application effect have been introduced.