Under the effect of weight and rotation, the drilling digs a hole on the rock. It is mainly used in oil production and the drilling of water well. The cutting will be on the surface by the hydraulic. Using rotary drilling to help consolidate the walls of the borehole. Rotary drilling is used to soft rock.
Down the hole drilling is called for DTH Drilling and it means rotary percussion drilling. DTH drilling is using to drilling rigs with a drill head for borehole and hammer for the bottom of hole. When the drilling bit is eccentric, the drilling can be done with a casing advancement system (installation of tubes by gravity) which reinforces the hole as the drilling progresses. This type of drilling is used for hard and cracked.
Contact Person: Mr. Jack Cheng