Design And Dynamic Analysis Of Oil Pumping Center

At present, mechanical oil production is the main oil production mechod. But because of the working theoty, configuration of puming units, working environment and other reason, there are many problems exist in the pumping units used at preaent, such as large fluctuate of load, low effciency of the system, poor working environment adaptability, high investment for each well and etc. To solve these problem, according to the structure of singal winch pumping unit, the pumping center unit was designed which can drive servral oil pumps at the same time and make the loads balance with each other..the main configuration and the drive system of pumping center were desigened according to the working principle and load character of it. The analysis of the rod load, movement rule and dynamics capability was carried out according to the change rule of the load of rod pumping system based on the simplify model of pumping center.Through the theory analysis, the dynamics simulation programme was developed with Matlab. The changes of resultant force, resultant torque and power of motor were analysed in different working situlation, they are the same oil well condition with/without balance weight, the different oil condition with/without balance weight, the different arrange of oil well range and etc. The simulation results prove that the pumping center unit can balance the loads itself, reduce the fluctuate of resultant torque obviously, meanwhile, the rule of the best order of the oil wells was found.Because of the large inertia of the heavy sucker rod and oil column, the startup of the pumping center is very difficult. To improve the startup capability of pumping center unit, the fluid coupling was used in the drive system. According to the motion equations of phase asynchronism machine and mechanical character of fluid coupling, the Matlab/Silulink simulation model was founded based on the equivalent dynamics model of system and the startup process of the system was simulated. The simulation result show that the fluid coupling can speedup the startup of large inertia system as pumping center system and reduce the power cosume during the startup process.