Above is a case in Mongolia. The storage tank is atmospheric pressure type, the liquid volume is 170m3/d, the comprehensive water cut reaches 55%. After the installation and use of the automatic separation device (LD-FL-HT-0.2), the comprehensive water cut is 1.5%, and the discharged water is filtered after going into the sewage pool, and then the purified water is injected by the booster pump back to the ground.  This process not only reduce the costly transportation of using tank trucks, but also solves the water source problem of the injection well. Moreover, because the energy of the injection formation is replenished, the output of the pumping well of the same layer increases significantly.