Analysis And Optimization Design Of Gas Lift Valve Device

The gas lift valve device is a specialized equipment used for gas lift oil production,with a simple structure and a wide range of applications.It is often used in oil wells with sand,high gas content,offshore production,and after stopping flowing.However,with the widespread application of technology,higher requirements have been put forward for the strength of internal components of gas lift valves and the reliability of gas injection and distribution systems.This article analyzes,calculates,and simulates the key components in the gas lift valve device.Based on the simulation results,the corrugated pipe,valve ball seat structure,and valve chamber structure of the gas lift valve have been optimized and designed.At the same time,a stable and reliable gas injection and distribution system for gas lift has been designed.The structure and composition of the gas lift valve device were introduced by establishing a three-dimensional model of the gas lift valve.The principle of the gas lift oil recovery process and the working principle of the gas lift valve were introduced based on the balance equation of the gas lift valve bellows.Using numerical simulation methods and Workbench software,the stress distribution of corrugated pipes under different inflation pressures and valve opening conditions was studied.The study showed that the equivalent stress on corrugated pipes was positively correlated with inflation pressure and valve opening;Using Workbench software,a study was conducted on the force acting on the valve ball seat when the bellows is only subjected to internal pressure.The study showed that there is a positive correlation between the force acting on the valve ball seat and the inflation pressure of the bellows,with the maximum force acting at the contact point between the valve ball and the valve seat.To determine the changes in valve opening,fluid type,and injection pressure under different operating conditions during gas lift oil recovery,a numerical simulation method was used to analyze the flow field of nine different operating conditions of gas lift valves during gas lift oil recovery using Fluent software.The study showed that the flow velocity and pressure in the valve chamber were positively correlated with injection pressure and valve opening,and the maximum pressure change and maximum flow velocity were mainly located in the single flow valve channel.Based on the simulation results of the bellows,valve ball seat structure,and valve chamber structure,optimize the design of the bellows,valve ball seat structure,and valve chamber structure.Change the wall thickness and wave height of the corrugated pipe,change the valve seat structure to a circular arc structure with the same curvature radius as the valve ball,and change the single flow valve channel in the valve chamber to a similar triangular structure.Research has shown that after optimization,the force on the corrugated pipe has been reduced by about 35%,the force on the valve ball and seat structure has been reduced by about 60%,and the fluid flow rate in the valve chamber has been reduced by 21%.Effectively reducing the risk of damage to the strength of corrugated pipes,valve ball seats,and the impact loss of fluid on the gas lift valve,the optimization results are good.A set of gas lift injection and distribution system design was designed,using PLC and frequency converter strategy to select equipment such as PLC,compressor,and frequency converter.The PLC wiring and control quantity matching design were completed,and the PLC program was written.Based on the designed gas lift injection gas distribution system,the control and monitoring interfaces were developed using MCGS configuration software,and the output pressure of the air compressor was simulated.The simulation results were good and the gas injection control was stable.