ABSTRACT
ABSTRACT: In order to determine the mechanism of PCP full level, three sections were chosen, and Bernoulli equations were established between the adjacent sections. The height of the liquid in the opened cavity was confirmed, the numerical models of the opened cavity volume and the pumping liquid volume were established, and then the dynamic full level of PCP was determined. The results indicate that: the full level curve is separated into two sections due to the influence of the reciprocating motion of rotor. At the first half of the rotor motion, as the cavity open, the full level increases to a stable value. At the second half of the rotor motion, as the cavity close, the pumping liquid volume is less than the opened cavity volume, the full level decrease. Compared to viscosity and water content, the influence of dynamic liquid level, revolving speed and production gas-oil ratio upon full level is great.
