Reaming Bitis a positive displacement downhole power drilling tool that uses drilling fluid as power to convert 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.

working principle

Screw drilling tool is a positive displacement downhole power drilling tool that uses drilling fluid as power to convert 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 realize the drilling operation.

component

Extension Drilling Tools is mainly composed of four major assemblies: bypass valve, hydraulic motor, cardan shaft and drive shaft. The screw motor is the main component of the drilling tool. Many practical and theoretical analysis results show that if the motor is to work normally and effectively, the pressure drop that each stage of the motor can withstand should not exceed 0.8Mpa, otherwise the motor will leak. The speed drops quickly, and in severe cases, it stops rotating completely and the motor is damaged. (One lead of the motor is one level) The mud flow rate used on site should be within the recommended use range, otherwise it will affect the efficiency of the motor and even increase the wear. The performance parameters of the screw motor are the main performance parameters of Extension Drilling Tools. The theoretical output torque of the motor is proportional to the pressure drop of the motor, and the output revolutions are proportional to the input mud flow. As the load increases, the drilling tool revolutions decrease. So as long as you control the pressure gauge on the ground and the pump flow rate, you can Control the torque and speed of the downhole drilling tool.