A progressive cavity type displacement Sealed bearing roller reamer hole bottom power machine, called a screw drill. With mud, water-powered media delivery to drill through the center hole of the screw drill hole bottom, essentially liquid pressure can be converted to an energy-mechanical energy conversion devices. When drilling, drill the screw directly connected to the drive shaft of the bottom of its hole core drill pipe and rotated the entire drill string only as a high-pressure working medium transport channel and support the anti-torque drill rod, not for rotary motion. By screw drill Non magnetic drill collar drilling compared to conventional drilling has many advantages, such as a significant decline in the drill wear, high drilling rate. It is playing a major appliance directional hole has to play a role in the drilling fields.