隔水管接头O形密封圈密封性能分析.pdf

石
2013年第41卷第1期
CHINA PETROL EUM MACHINERY
海洋石油装备
隔水管接头0形密封圈密封性能分析
温纪宏陈国明'畅元江代福强2
(1.中国石油大学(华东)海洋油气装备与安全技术研究中心2.中国石油集团海洋エ程有限公司海工事业部
摘要:针对海洋石油开采中隔水管接头密封失效会增加大量的钻井成本,钻井液泄漏会污染
海洋环境等间题,开展了隔水管接头O形密封圈密封性能的研究,确定了O形密封圈密封失效模
式和失效判据。以隔水管O形密封圈为研究对象,利用大型有限元分析软件 ABAQUS建立其有限
元分析模型,对密封圏在不同工作压カ、不同压缩率和不同密封端面角度下的密封性能进行了分
析。分析结果表明,压缩率一定时,最大应力随着工作压カ的増加而增加,且应力峰区位置逐渐
向0形圈被挤入的位置移动;工作压カ、压缩率及密封配合端面角度对O形圈最大接触应力有一
定的影响,正常使用范围内,能够保证O形圈的正常密封性能;一定在压缩率范围内,剪应力随
着压缩率的增加而增大明显。分析结果可以为隔水管接头O形密封圈的优化设计提供参考。
关键词:隔水管;接头;0形密封圈;密封性能;有限元分析; ABAQUS
中图分类号:TE953文献标识码:Adoi:10.3969/j.issn.1001-4578.2013.01.012
Sealability Analysis of the Riser Joint O-ring
Wen Jihong Chen Guoming Chang Yuanjiang Dai Fuqiang
(1 Centre(shore Engineering and Safety echnology, China Universi of Petroleum, Qingdao City 2. Department of Ma-
rine, Ofshore Engineering Co. Itd. CNPC)
Abstract: The sealing failure of riser joint will raise the drilling cost remarkably in of shore petroleum produ
tion. The drilling fluid leakage will pollute the ocean environment. Considering the problems, research on the seal
ability of riser joint O-ring was conducted. The model and sealing failure criteria of O-ring were determined. With
the riser O-ring as the object of study the large-scale finite element software ABAQUS was used to establish its finite
element analysis model. The sealability of the ring was analyzed in different operating pressures, different rates of
compression and different seal end angles. The analysis shows that when the compressibility is certain, the maximum
stress increases with the operating pressure. The stress peak area gradually moves to the squeezed position of O
ring. The operating pressure, compressibility and seal matching end angle have some effect on the maximum contact
stress of O-ring. The normal sealability of O-ring can be ensured within the scope of normal application. The shear
stress increases remarkably with the compressibility within a certain scope of compressibility. The analysis can offer
a reference for the optimized design of the riser joint O-ring
Key words: riser joint; O-ring; sealability; finite element analysis; ABAQUS
封成为隔水管设计与分析的重点。当接头密封失效
时,需要提起钴井隔水管,更换失效密封件后,再
下放隔水管,大大延长了钻井时间,增加了钻井成
随着石油开采向海洋发展,钻井隔水管接头密本,造成大量的损失。
*基金项目:国家科技重大专项“深水钻井隔水管作业管理及安全评价技术研究”(201ZX05026-001-(05);中央高校基本科研业务
费专项资金资助项目“深水钴井平台避台期间隔水管悬挂与平台撤离决策技术”(11CX05009A)。