1.Brief introductions of KQZ-180D pneumatic-electric DTH drilling rig KQZ-180D pneumatic-electric DTH drilling rig is suitable for drilling and geothermal drilling. It has many advantages, such as large diameter, deep drilling, fast footage, flexible movement and wide application area. 2.Specifications of KQZ-180D pneumatic-electric DTH drilling rig KQZ-180D Borehole diameter mm 100-219 Borehole depth m 150 Drilling angle ° 45-90 One-time feed stroke mm 1500 Motor power kw 7.5 Rotating speed of drilling tools rpm 0-78 Air pressure mpa 0.8-2.1 Air consumption l/min 13-21 Weight kg 600