水下采油树生产通道可靠性设计及分析

Reliability Design and Analysis of Subsea Production Flowloop

水下采油树所处海底环境较为复杂,需要对水下采油树的各重要部件进行高可靠性设计。针对水深1 500m、压力等级69MPa的设计条件,根据ASME B31.3中高压管道壁厚公式计算出水下采油树生产管道壁厚为11mm。在安全系数设计的基础上,综合了有限元分析、蒙特卡洛模拟方法,对生产管道进行可靠性分析,验证了设计壁厚的可靠性满足强度要求,并根据灵敏度分析得出影响生产管道可靠度的关键因素是壁厚、内压和材料屈服极限。

Subsea tree at the bottom of the sea which environment is relatively complex,it is necessary to make the reliability design research on important components.Under the design conditions of water depth being 1 500 mand pressure grade being 69 MPa,the thickness of production flowloop is designed as 11 mm,according to the standard of ASME B31.3.Synthesis the finite element analysis and Monte-carlo simulation method,the reliability analysis is carried out on the production flowloop and validated reliability of the thickness met the strength requirement.The result of sensitivity analysis shows that the influent factor of production flowloop reliability is thickness,inter pressure and yield limit.