... 3.High efficiency 4.Small weight and volume water well drill rigs for sale Technical Parameter Drilling depth60-80mDrilling diameter70-300mmPower Engine7 ... ); 2. Easy to operate, with or without experience can be used; 3. Long life, the first generation product for 13 years ... carbide, (apart from the more hard rock can drill through the thick; 5. Drill deep, with booster, reduce labor intensity; 6. ...