Performance Of Mud Pumps

The two main parameters of mud pump performance are displacement and pressure.

Displacement
Displacement is calculated in terms of how many liters are discharged per minute. It is related to the diameter of the borehole and the required return speed of the flushing liquid from the bottom of the hole. That is, the larger the hole diameter, the greater the required displacement. The return speed of the flushing fluid is required to be able to flush the cuttings and rock powder cut by the drill bit away from the bottom of the hole in a timely manner and reliably carry them to the surface. When drilling geological cores, the return speed is generally around 0.4 to 1.0 meters/minute.

pressure
The pressure of the pump depends on the depth of the borehole, the resistance of the channel through which the flushing fluid passes, and the nature of the flushing fluid being transported. The deeper the borehole, the greater the resistance in the pipeline and the higher the pressure required.
As the diameter and depth of the borehole change, the displacement of the pump is required to be adjusted at any time. A gearbox is provided in the pump mechanism or a hydraulic motor is used to adjust its speed to achieve the purpose of changing the displacement. In order to accurately grasp the changes in the pressure and displacement of the pump, a flow meter and a pressure gauge must be installed on the mud pump to allow drillers to understand the operation of the pump at any time. At the same time, the pressure changes can be used to determine whether the conditions in the hole are normal to prevent accidents in the hole.