Displacement:
Displacement to discharge a number of liters per minute accounting, it is related to the hole diameter and the required flushing fluid from the bottom of the return speed, that is, the larger the aperture, the greater the required displacement. It is required that the speed of the washing liquid can be cut down from the drill bit, and the rock powder can be washed away from the bottom of the hole in time, and can be reliably carried to the surface. Geological core drilling, usually on the return rate of 0.4 ~ 1 m / min.
Pressure:
Pump pressure depends on the depth of the hole, flushing fluid through the resistance of the channel and the nature of the transport of flushing fluid, etc.. The deeper the drill hole, the greater the resistance of the pipeline, the higher the pressure required.
With the change of the diameter and depth of the hole, the displacement of the pump can be adjusted at any time. A gear box or a hydraulic motor is arranged in the mechanism of the pump to adjust the speed of the hydraulic motor in order to reach the purpose of changing the displacement. In order to accurately grasp the change of the pump pressure and displacement, the mud pump to flow meter and pressure gauge installation, at any time so that staff understand the drilling pump delivery \ turn, while the pressure change discriminant hole whether the normal state to prevent accidents in the hole attack.
