Study On Structure Optimization And Performance Of Anti-gas Pump

Oil pump plays an important role in oilfield mining.Pumps in high gas wells will produce air locks,air pump is widely used.In this paper,by studying the anti-air lock principle of air-proof pumping pump,solving the air lock and reducing the vibration,it puts forward scientific suggestions for the production and application,which is of great practical significance to improve the oil recovery and realize the pump efficiency.In this paper,a full-cycle dynamic numerical simulation method for the study of the flow characteristics of gas-liquid two-phase flow in the pump is explored by using the conventional pump as the object of study.Then,the flow of gas-liquid two-phase flow in the gas pump is studied by this method.law.In this paper,the theoretical calculation,numerical simulation and experimental research methods are used.The main contents are as follows: the establishment of the model of anti-gas pump,the setting of boundary condition,the selection of simulation parameters,the analysis of the simulation results and the comparison of the test data.The main research is:A full-cycle dynamic numerical simulation method for studying the flow characteristics of gas-liquid two-phase flow in the pumping pump is developed.This method can simulate the pressure change of the gas-liquid two-phase flow in the pump during the pumping pump.Change,flow change.Use the simulation results to calculate the valve opening time,stroke loss and pump efficiency.The factors influencing the pumping efficiency of pumping pump are studied by using the above numerical simulation method,and the influence law of each factor on pumping efficiency of pumping pump is analyzed.Numerical simulation and theoretical analysis of the results are consistent,confirmed that the dynamic simulation method for the study of the correctness of the pump.Using the above simulation method to analyze the anti-air pump anti-gas lock principle,that is,through the plunger at the end of the upper stroke to pull the cylinder so that the pressure inside the pump to reach the same pressure within the tubing,so that the next step when the swimming valve turn on.While the tubing below the high water medium into the cylinder is conducive to the next cycle in the fixed valve in time to open.But in the upper stroke of the end of the pressure inside the pump there is pressure mutation,resulting in a greater impact of the sucker rod vibration.The numerical simulation method is used to optimize the structural parameters of the anti-gas pump.In order to reduce the vibration,open the pressure hole in the plunger,so thatthe process of pulling out the cylinder pressure slowly rise.And before and after the optimization of the anti-gas pump was tested,we can see that anti-gas pump has a good anti-air lock function,but can not reduce the gas into the pump.Therefore,the anti-air pump in the actual use of gas and liquid separation devices need to be used together.The innovation of this paper is as follows:(1)A full dynamic numerical simulation method for the flow characteristics of gas-liquid two-phase flow in the pumping pump is established.(2)Using the dynamic numerical simulation method to simulate the anti-gas pump,the anti-air lock principle of the anti-gas pump is obtained.