Pump pressure depends on the depth of drilling, washing liquid after passage of the resistance and the nature of the transmission fluid. Drilling deeper, larger pipe resistance required higher pressure.
With the hole diameter and depth of change requires pump displacement can be adjusted at any time. Pump with gearbox or hydraulic motor adjusting speed in order to achieve the objective of changing emissions. In order to accurately grasp the pump pressure and changes in emissions, to install a flow meter and pressure gauge on the pump, drilling personnel to understand the pump can transport \ transfer at any time, whether through pressure changes distinguishing hole normal to prevent the hole in the accident.