... ,Website:http://www.yikuangdrilling.com, the drilling rig is suitable for water well drilling, prospecting, geophysical exploration, roads and ... to different alloy drill bit and PDC drill bits and so on.3, It can drill 2-9 grade ... easy operation, maintenance of the salient features.Technical parametersMax drill depth200mHole diameterφ75-φ300mmEnd Hole diameter75mmKelly diameter53/59*4200mmDrill ...