论文部分内容阅读
室内聚合物的溶液流变性测试表明 ,大庆油田应用的聚合物溶液的流变性符合幂律模式。运用非牛顿流体力学理论和数理方法 ,考虑抽油杆的上、下往复运动 ,建立了杆管同心与偏心 2种情况下速度、流量与压力梯度方程 ,并得到近似解。计算实例表明 :杆管环空中流体的速度随杆的上、下运动不断地变化。杆管同心时 ,非牛顿性越强 ,速度最大值越偏离几何中心 ;杆管偏心时 ,θ =0 ,n值越小 ,无因次最大速度越大 ,θ=π时 ,两者有差别。
The rheological properties of the polymers in the laboratory show that the rheology of the polymer solution used in Daqing Oilfield conforms to the power-law model. Using non-Newtonian fluid mechanics theory and mathematical method, taking into account the up and down reciprocating motion of the sucker rod, the velocity, flow and pressure gradient equations under two kinds of concentric and eccentric conditions were established and the approximate solution was obtained. The calculation example shows that the velocity of the fluid in the annulus of the pipe tube continuously changes with the upward and downward movement of the rod. When the tube is concentric, the non-Newtonian is stronger and the maximum velocity deviates from the geometric center. When the tube is eccentric, θ = 0, the smaller the value of n, the larger the dimensionless maximum velocity, θ = π, .