热采井口装置全尺寸热-流-固强度计算及安全评定
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摘要
采用数值模拟的方法,对KR14-337型热采井口装置进行全尺寸热-流-固强度计算,分析其流场、温度场以及应力场。基于弹性分析评价准则,对其主要的承压部件(上法兰、阀体、油管头四通、小四通、螺栓)进行了安全评定。结果表明:该热采井口装置中压力波动并不大,可以看作为均匀内压。阀体和小四通位置存在较大的温度梯度,强度校核时必须考虑不均匀温度场所产生的热应力。主要承压部件中,上法兰和螺栓处的安全裕量较小,在以后的在役检测评价过程中应给予特别关注,以保证设备长周期安全稳定运行。
The heat-flow-solid strength for the KR14-337 thermal wellhead equipment was calculated based on the method of numerical simulation. The fields of flow, temperature and stress were analyzed comprehensively. The safety assessment of several main pressure-bearing components(upper flange, valve body, tubing head cross, small cross, lower flange, bolt) were performed based on the elastic evaluation criteria. The results show that the pressure of thermal wellhead equipment can be regarded as uniform inner pressure as no significant fluctuation was observed. A large temperature gradient was found at the valve body and the small four-way position, which indicates that the thermal stress generated by the uneven temperature field should be considered in the strength assessment. Among the main pressure-bearing parts, the safety margin of the upper flange and the bolt is minor, which indicates the special attention is required for the in-service inspection and evaluation of those components to ensure the safe and stable operation of the equipment in a long period.
The heat-flow-solid strength for the KR14-337 thermal wellhead equipment was calculated based on the method of numerical simulation. The fields of flow, temperature and stress were analyzed comprehensively. The safety assessment of several main pressure-bearing components(upper flange, valve body, tubing head cross, small cross, lower flange, bolt) were performed based on the elastic evaluation criteria. The results show that the pressure of thermal wellhead equipment can be regarded as uniform inner pressure as no significant fluctuation was observed. A large temperature gradient was found at the valve body and the small four-way position, which indicates that the thermal stress generated by the uneven temperature field should be considered in the strength assessment. Among the main pressure-bearing parts, the safety margin of the upper flange and the bolt is minor, which indicates the special attention is required for the in-service inspection and evaluation of those components to ensure the safe and stable operation of the equipment in a long period.
引文
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[2] 龚凯,周海,张圆,等.采油井口装置中闸阀阀体的应力分析及结构优化[J].机械工程与自动化,2016(4):38-39.
[3] 华剑,周思柱,李宁.35MPa采油井口装置大四通有限元分析与优化[J].石油天然汽学报,2010,32(2):154-156.
[4] 李斌,杨振东,蒲勇.双管采油井口装置大四通优化及疲劳分析[J].石油和化工设备,2011,14(7):20-23.
[5] 邱福寿,胡承军,王斌,等.SAGD热采井口装置六通的三维应力分析及结构优化[J].新疆石油天然气,2015(3):83-86.
[6] 胡承军,彭辉,蒙永利.稠油热采井口装置的热应力分析[J].新疆石油科技,2010(4):54-57.
[7] 胡承军,蒙永立,黄晓东,等.双管热采井口的有限元应力分析及结构优化[J].新疆石油科技,2006(1):46-50.
[8] 蒋文春,巩建鸣,陈虎,等.304不锈钢半管夹套焊接部位残余应力有限元模拟[J].压力容器,2006,23(5):25-28.
[9] 张季,赵国忠,张皓,等.基于精细螺栓模型的爆破阀热固耦合密封性能分析[J].压力容器,2018,35(2):13-23.
[10] 巩建鸣,涂善东,牛蕴.火灾环境下液化气球罐力学响应的有限元分析与安全评价[J].压力容器,2003,20(4):6-9.
[11] 周国发,李红英.基于顺序耦合的火灾环境下气瓶热及力学响应数值模拟[J].压力容器,2012,29(9):28-32.
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