Research On Simulation And Optimization Of Beam Pumping Unit Based On Carbon Fiber Sucker Rod System

Carbon fiber sucker rod has its unique advantages.At present,carbon fiber sucker rod is widely used in sucker rod pumping system in oil field.As the most important ground equipment of sucker rod pumping system,beam pumping unit has become a research hotspot.Based on the sucker rod pumping system,the carbon fiber sucker rod is used in the sucker rod,and the conventional beam pumping unit is used as the cushion.The kinematics and dynamics of the sucker rod are analyzed.The beam pumping unit with carbon fiber sucker rod is simulated and the simulation results are analyzed.The main structural problems of the beam pumping unit after the application of carbon fiber sucker rod are fully excavated.Based on the simulation analysis data,in order to achieve energy saving and consumption reduction of carbon fiber sucker rod production system,the geometric structure parameters and performance parameters are optimized respectively.The main research contents are as follows:The suspension motion law of beam pumping unit is analyzed in detail,and the deduction and calculation formulas of suspension displacement,suspension velocity and suspension acceleration are given.The variation law and deduction calculation of suspension static load and suspension dynamic load in the upper and lower stroke of beam pumping unit are analyzed in detail.The stress of key components such as beam and connecting rod of beam pumping unit is decomposed and calculated.The formulas provide the basis for subsequent dynamic simulation and finite element analysis of components;the dynamic analysis of carbon fiber-steel hybrid sucker rod string combination with steel rod as counterweight rod is carried out,and the mathematical model of rod-string combination is established based on onedimensional wave equation with damping,and the analysis conditions are given.A three-dimensional solid model of a beam pumping unit is established and a suspension load is applied.The suspension load is obtained from the dynamometer diagram of the operation of carbon fiber sucker rod.A series of curves of the displacement,velocity,acceleration of the suspension and the stress state of its key components are obtained by simulation with ADAMS software.The measured dynamometer diagram and theory of the operation of carbon fiber sucker rod are compared.The variation of load exerted by power diagram is discussed in depth to investigate the motion law of suspension point of beam pumping unit and the influence of stress condition of key components on its main performance.A mathematical model for optimum design of beam pumping units is established.The root mean square value of net torque of reducer is determined as the objective function by synthesizing various performance indexes.The design variables are selected.The optimum design program of beam pumping units is compiled by MATLAB optimization toolbox.Based on the geometric dimensions of the four-bar structure of the beam pumping unit,a threedimensional solid model of the optimized beam pumping unit is established,and the suspension load is also applied.The suspension load is still obtained from the dynamometer diagram of the operation of the carbon fiber sucker rod.The optimized beam pumping unit is simulated and analyzed,and the difference of simulation results before and after optimization is compared.ANSYS Workbench is used to analyze the key components of the beam pumping unit and verify the reliability of the optimized beam pumping unit.