ZJ20 oil& heat drilling rig is mainly used in exploration of oil,Coal gas ... and heat ranking 2000-2500 meters deep. ZJ20 oil& heat drilling rig is mainly used in exploration of oil,Coal gas ... .5mSecond Table height16.5 m,17.5Second Table capacity(5”drill rod)2500 m2800m Framework modeBox terrace table height1.7m,2 ... height0.7m,1.8m,3.5mOperation modepneumatic ZJ20 oil& heat drilling rig