Structure Design And Performance Research Of Double Water Injection Distributor

Oil exploitation had been pursuing low cost and high yield.With the continuous oil exploitation in major oil fields,the energy inside the formation was continuously reduced,which made the process of oil exploitation more and more difficult.Therefore,water injection was needed to keep the pressure and reached the equilibrium exploitation of oil.As a common injection method in oil field,layered water injection had obvious advantages compared with Bailing type,and water distributor was one of the key equipment in layered water injection technology.In this paper,the design goal was that the two layers could be adjusted by a graded water injector in double water injection well.The driving motor was used to control the opening and closing of the two nozzles.The roller screw with diameter of8 mm was used as the driving mechanism,the nut on the roller screw was used as the trigger of the travel switch,and the design nozzle size was 24 mm,and the spacing between the two nozzles was 50 mm,and four seals are used,The length of slide rod and slide sleeve was determined.The diameter of two channels was 30 mm and 20 mm respectively.Eccentric pipe column was adopted to complete the overall design of water distributor.The flow field of two channels with different opening was analyzed by FLUENT software.The results showed that the maximum velocity decreases rapidly when the opening of water nozzle was lower than 10 mm,and then it decreases slowly after more than 10 mm.The inverse proportional function between flow pressure,velocity and opening of water nozzle was obtained by data analysis and fitting analysis.The stress analysis of key parts of water distributor was carried out by ANSYS software.It was found that with the change of opening of water nozzle,the maximum stress of sliding rod and seal was fluctuating.The range of stress fluctuation was within the strength range of material,which meets the strength of sliding rod,and the deformation amount of workpiece was small,which would not cause jamming due to deformation.Finally,Adams was used to simulate the kinematics,and the maximum friction force of each seal was obtained.The maximum torque was 120.5 N·m during the movement.Compared with the motor,the matching motor could meet the design requirements.