The probe zero value is zero at this time to get the value of the probe
Work process just to make a small amount of supplement. Hydraulic piston pump can be operated single-well, you can also build pump centralized management, a wide range of displacement adaptation, from tens to thousands of cubic diesel flow meter meters per day, etc., suitable for deep, high-lift wells, heavy oil, inclined. The advantage is the displacement can be adjusted, from the convenience of the pump tubing can not afford the operation and management. Pump efficiency up to 85%. The disadvantage is that the ground have to build a high-pressure pipelines, power fluid to be processed, an increase of well construction and management costs.