(PDM drill), is a drilling fluid as the driving force, the liquid pressure can be converted into mechanical energy of the volume of underground power drill. When the mud pump out of the mud through the bypass valve into the motor, the motor inlet and outlet to form a certain pressure difference, to promote the rotor around the axis of the stator rotation, and the speed and torque through the universal shaft and drive shaft to the drill , In order to achieve drilling operations.
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Use Requirements:
1, drilling fluid requirements: screw drilling for all kinds of mud can work effectively, including oil-based mud, emulsified mud and clay mud, and even water, etc.
2, the mud pressure requirements: when the drill is suspended, the displacement is the same, then the mud pressure through the drilling tool is also the same, with the drill bit contact bottom hole pressure increases, the mud circulation pressure increases.
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