Research On Key Technology Of Electro-hydraulic Composite Subsea Control Module Of Subsea Christmas Tree

The subsea control module is a key component of the underwater control system and can be considered as a core component in connection with surface control and underwater production.It guarantees the safety,orderliness,reliability and economy of the underwater production process.At present,entering the ocean is a great blueprint for China's oil industry,and China is bound to make great achievements in offshore oil projects.Therefore,accelerating the research process of offshore oil equipment and narrowing the technological gap with developed countries in this field is a must for my relevant scientific research workers.Studying the key technologies of the "electro-hydraulic composite subsea control module" and promoting the nationalization of the key technologies of the underwater production system is a matter of course.In this paper,the structure and function of electro-hydraulic composite underwater oil recovery are deeply analyzed,and the overall structural function of the underwater tree is comprehensively grasped,which lays a foundation for the design and research of the subsea control module.The design of the subsea control module is decomposed into three parts: electrical and electronic design,hydraulic control design and basic structure design.The research focuses on the basic structure design and hydraulic control design of the subsea control module.The electrical and electronic design is slightly involved.The working principle of the subsea control module was designed,the working principle diagram of the subsea control module was drawn,and the complete hydraulic control circuit was built by Auto CAD software.The key components of the hydraulic control part,such as the electro-hydraulic reversing valve,were selected and calculated.The hydraulic valve seat was carefully designed and calculated.The internal circuit of the hydraulic valve seat was simulated by using Solid Works software.The cylinder was designed with emphasis on the rationality of the design of the outer cylinder of the subsea control module using ANSYS software.A new type of integrity design theory is proposed.The modular design method is combined with relevant theories to establish a structural and functional integrity,reliability rationality and economic cost rationality evaluation formula.In the aspects of structural and functional integrity,reliability and rationality of economic cost,the influence of different design parameters on the design of subsea control module is discussed.According to particle swarm optimization theory,the relevant parameters are optimized by Matlab software..The internal pressure calculation method of the liquid-filled container was studied,and the finite element deterministic analysis of the outer cylinder of the subsea control module was carried out.The ANSYS software was used to carry out the strength finite element of the material strength failure and structural buckling of the subsea control module(liquid-filled compensation thin-walled cylinder).Design and study the influence of different design parameters on the structural strength of the subsea control module outer cylinder.The installation method of the subsea control module was studied,and the basic flow of the installation operation of the subsea control module was designed.The module locking mechanism was designed,and the basic model of the module running tool and the subsea control module mounting base was built using Solid Works software.