Screw drilling tool is a kind of customer accumulation type downhole power drilling tool that uses drilling fluid as power and converts hydraulic pressure energy into mechanical energy. When the mud pumped by the mud pump enters the motor through the bypass valve, a certain pressure difference is formed at the inlet and outlet of the motor, which pushes the rotor to rotate around the axis of the stator, and transmits the speed and torque to the drill bit through the cardan shaft and the drive shaft. , So as to achieve drilling operations.