Reasonable spacing optimization design method for underground graded pumping assistor of pumping well

The invention provides a reasonable spacing optimization design method for an underground graded pumping aid of a pumping well. The reasonable spacing optimization design method for the underground graded pumping aid of the pumping well comprises the following steps: step 1, determining a plurality of spacing alternative schemes; 2, the pump efficiency improvement amount corresponding to the average distance between the different pumping assistors is calculated; step 3, calculating the number of graded pumping assistors corresponding to each average distance; 4, the reasonable number of graded pumping assistors is determined; 5, calculating the reasonable average spacing of the graded pumping assistors; and step 6, calculating a reasonable distance between the pumping assistors at different positions. According to the reasonable spacing optimization design method for the underground graded pumping aid of the pumping well, the stroke loss of the graded pumping aid under different spacing conditions is calculat