... rotary speed. 3,Utility patent 5,Full hydraulic rig Exploration Drilling Rig(HGY-1500T) Brief introduction: 1.32 years ... performed by the hydraulic system. Use of Exploration Drilling Rig(HGY-1500T): for geotechnical investigation, exploring, prospecting, water ... deep hole drilling, etc. Technological Data of Exploration Drilling Rig(HGY-1500T) ModelHGY-1500T Exploration Drilling RigDrilling depth( ...