... .Easy operation 2.Economic drilling 3.High efficiency Land rig: 1. DT-60 drilling machine adopts advanced reverse circulation ... , easy to disassemble the machine,. 3. Assembled just need only a few minutes, After disassembling, the most biggest part is 100 ... greatly. 5. For drilling clay, loam, sand, weathered rock and a small amount of gravel areas can better play its mechanical ...