JDL-350/XJDL-350 mechanical top drive driling rig is a driling equipment independently developed by the company thatcan drill 90° and integrates the functions of water dril and air drll (National invention Patent: ZL201510479602.4). lt adopts5-speed manual car transmission. wide speed range, sensitive and convenient forward and reverse switching, hightransmission efficiency, grealy reduced power energy consumption, more efficient and energy-saving. it solves the dificuty oldriling with air down-the-hole hammers in soil layers and the low construction efficiency of rotary drilling rigs in hard rocklayers, gravel, and pebble layers.