DYNAMIC ANALYSIS OF THE SUCKER ROD IN THE POLYMER FLOODING METHOD

The eccentric wearing of a sucker rod in polymer flooding is much moreserious than that in water flooding, mainly due to the normal forceof production liquid in polymer flooding. Based onthe non-Newtonian fluid mechanics theory, a normal force computationalmodel is established using the upper-convected Maxwell model, and thedistribution of the normal force inside the well is confirmed and then putinto the mechanical model of the sucker rod. With the real boundary condition, the analysis of the sucker rod is carried out usingthe finite element method. With Well FU081801 as an examplesimulation method is validated. The simulation result agree with the detection result, whichdemonstrates the applicability of this method. Through the method, we canpredict the eccentric wearing position of the rods and tubes, as well as theinfluence of polymer concentration on the eccentric wearing of the sucker rod.