摘要
针对水下采油树油管悬挂器锁紧机构易发生塑性失效的问题,基于有限元方法对锁紧机构锁固过程进行仿真分析,在此基础上,采用控制变量法对台肩角度(0°~20°)对结构的应力影响开展研究,以实现对锁紧机构应力分布的优化,最后基于优化后的设计方案研制了油管悬挂器实验样机,并开展了静水压试验测试。结果表明:①所设计的油管悬挂器锁紧环完全胀开所需驱动力为13891 N,整个锁固过程锁紧环应力最大,为781.34 MPa,发生在开口处内壁面下方与底面交界处,载荷步骤3为最危险工况;②当台肩角为15°时,可显著改善锁紧机构的应力分布,增强锁固可靠性,且锁紧结构强度满足校核要求;③静水压测试结果表明所设计的油管悬挂器锁紧结构能够满足实际环空压力下对油管悬挂器的锁固,锁紧性能良好。研究成果为油管悬挂器锁紧机构的优化设计提供了参考。
To address the risk of plastic failure in the locking mechanism of the tubing hanger used in subsea Christmas trees,a finite element simulation was conducted to analyze the locking process.On this basis,a study was carried out using the control variable method to evaluate the influence of shoulder angles(ranging from 0°to 20°)on the structural stress,so as to optimize the stress distribution of the locking mechanism.An experimental prototype of the tubing hanger was developed based on the optimized design,and hydrostatic testing was performed.Results indicate that:①The designed locking ring of the tubing hanger requires a driving force of 13891 N for full expansion.The maximum stress during the locking process reaches 781.34 MPa,located at the junction between the inner wall and the bottom surface near the opening,with load step 3 being the most critical condition.②A shoulder angle of 15°significantly improves the stress distribution,enhances locking reliability,and ensures that the structural strength meets verification criteria.③Hydrostatic testing confirms that the designed locking mechanism reliably secures the tubing hanger under actual annular space pressure,demonstrating excellent locking performance.This study provides valuable insights for the optimized design of locking mechanisms of tubing hangers.
作者
王向宇
董劲
钟源
于小涛
彭骁俊
贾鹏
王立权
WANG Xiangyu;DONG Jin;ZHONG Yuan;YU Xiaotao;PENG Xiaojun;JIA Peng;WANG Liquan(Yantai Research Institute,Harbin Engineering University,Yantai,Shandong 264000,China;WEFIC Ocean Equipment Manufacturing Co.,Ltd,Dongying,Shandong 257091,China;College of Mechanical and Electrical Engineering,Harbin Engineering University,Harbin,Heilongjiang 150001,China;AECC Hunan Aviation Powerplant Research Institute,Zhuzhou,Hunan 412002,China)
出处
《中国海上油气》
北大核心
2025年第4期193-203,共11页
China Offshore Oil and Gas
基金
烟台市科技创新发展计划基础研究项目“水下采油树系统关键结构多因素耦合下疲劳特性研究(编号:2023JCYJ056)”
工信部高技术船舶科研项目“海洋油气装备关键设备测试认证技术研究与验证平台研发(编号:CBZ02N23-10)”
山东省自然科学基金“基于数字孪生的水下控制模块虚实融合故障诊断方法研究(编号:ZR2024QE251)”。
关键词
水下采油树
油管悬挂器
锁紧机构
仿真分析
台肩角度
结构优化
强度校核
静水压测试
subsea Christmas tree
tubing hanger
locking mechanism
simulation analysis
shoulder angle
structural optimization
strength verification
hydrostatic testing
