| The abundant marine oil and gas resources have gradually attracted the attention and attention of more and more countries.At present,the mainstream form of its exploitation is the electro-hydraulic compound underwater production system.The subsea control module(SCM)is the core equipment of the underwater production system,responsible for controlling and monitoring the underwater production equipment.However,the core technology of the SCM has long been monopolized by countries such as Europe and the United States.Domestic research on the SCM is still in the early stage.The construction of underwater production systems mainly depends on imports,which severely restricts the development of my country’s offshore oil and gas extraction equipment.Therefore,the research on the localization of SCM is imminent.Mastering the core technology of the SCM and breaking the foreign technology blockade is of great significance to the development of my country’s marine resource development equipment.According to the functional requirements of the Bohai oil and gas field environment and production system,this paper determines the overall scheme of the electro-hydraulic composite subsea control module,the basic forms of the SCM protection mechanism,pressure compensation mechanism,hoisting and docking locking mechanism,and determining the sealing,anti-corrosion,Anti-sea creature plan and the SCM overall arrangement and installation method;According to the functional requirements of hydraulic system,determine the working principle,component composition and installation arrangement plan of SCM hydraulic system.According to the determined plan,the specific structure of the the SCM structure is designed in detail,strength check,and simulation analysis;the pressure loss of the hydraulic oil in the hydraulic pipeline is analyzed and calculated,and the fluid flow characteristics of the oil in the typical hydraulic pipeline are simulated and analyzed by Fluent.Analyze the characteristics of the O-ring material and the failure mode of the static seal,and conduct a simulation study on the static seal of the the SCM.In-depth analysis and research is conducted on the docking positioning,locking and unlocking process of the SCM and the mounting base(SCMMB),calculating the overall force state of the SCM under different working conditions;performing the force on the locking,working,and unlocking processes of the locking mechanism Analyze and verify its strength by simulation;according to the optimization theory,analyze the influence of the parameters of the locking block on the maximum stress and quality,and optimize its structural size to reduce the maximum stress.Combining theoretical calculation and dynamic simulation analysis to study the driving torque required by the SCM locking mechanism when locking and unlocking.Analyze the docking positioning accuracy of the SCM,establish mathematical models of alignment deviation,tilt angle,and docking deviation,and analyze the relationship between docking accuracy and various dimensional parameters.According to the SCM functional requirements and international standards,test methods are designed,and according to the test content and requirements,a corresponding test platform is built to conduct tests to verify the integrity of the SCM performance and functions.Through the pressure test,verify the structural and functional integrity of the SCM integrated valve plate oil circuit.Through the mechanical system test,verify the pressure resistance and sealing performance of the SCM,and verify the docking positioning,locking and unlocking functions of the SCM with the SCMMB with the aid of the installation tool.Through the hydraulic system test,verify the performance and function of the hydraulic system.Through the hyperbaric chamber test of the SCM and the Subsea Electronic Module(SEM),verify the pressure resistance and sealing performance of the protective mechanism shell,as well as the working state of the SCM in the simulated water pressure environment.Through the joint test of the SCM and the Christmas tree,the control and monitoring of the Christmas tree by the SCM is verified in the actual operating environment. |
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