I love inventing super rotary drilling rigs. Can they dig wells? Can they move rocks? How deep can they hit?
Because now the double power head drill wells with rotary drill rod is rotary drill, but few are more than 2 meters in diameter with direct rock itself, very fast, low cost of the machine drill many times than rotary drilling. I suggest you check the pile hole drill on the Internet, or the China Sea Hengtong, it is easy to find information.
Now, the rotary drilling will be replaced by the new double power wells drilled by the China shipping line
