КОМБИНИРОВАННАЯ РОТОРНО-УСТЬЕВАЯ УРАВНОВЕШИВАЮЩАЯ СИСТЕМА СТАНКА-КАЧАЛКИ

Abstract

Relevance. One of the most important factors determining the efficiency of the rod pump installation is the degree of balance in the drive. With existing balancing technologies, pumpjack units are subject to significant fatigue wear due to high loads on the drive. This leads to premature failures and increased power consumption. The foregoing determines the relevance of development and improvement of methods for balancing pumping units. Object: rod pumping installation with a combined rotary-wellhead counterbalancing system, including a wellhead counterweight, applied through flexible rod directly to the wellhead rod, which allows compensating a part of the constant load at the point of suspension of the rods, due to the weight of the rod string in the liquid. The aim of the research is to develop a technique for calculating the combined rotary-wellhead counterbalancing system, including determining the weight of the wellhead counter-load and calculating the rotor counterweights located on the crank; energy optimization of the balancing system, based on the fulfillment of criteria for minimizing the load on the drive and the energy expended to lift well production during the calculations. Methods: application of the principles of analytical mechanics for compilation of the equations of the dynamics of the system under consideration, numerical simulation methods in the study of formation of dynamic loads in the underground and surface parts of the rod pump installation. Results. The authors have developed the technique for calculating a combined rotary-wellhead counterbalancing rod pump installation, which minimizes the load on the drive of the pumping unit and helps reduce energy consumption for oil production by ensuring a uniform load on the drive motor during a swing cycle. When calculating the dynamic loads in the units of the pump installation, the effectiveness of the rotary-wellhead counterbalancing system is shown.