遇油膨胀封隔器胶筒密封性能有限元分析  

Finite Element Analysis of the Sealing Performance of Swellpacker Rubber

作　　者：罗伟[1] 付建红[1] 杨兰田 贾晓斌 宋科雄 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室 [2]中石化西北油田分公司 [3]重庆地质矿场研究院

出　　处：《石油机械》2013年第11期84-87,共4页China Petroleum Machinery

基　　金：国家科技重大专项“超深开窗侧钻井钻完井技术配套”(2011ZX05049-002-002)

摘　　要：胶筒的密封性能直接制约着封隔器的工作性能,对胶筒密封性能研究的关键就是研究胶筒与井壁之间的最大接触压力。为此,建立了遇油膨胀封隔器的计算模型,采用有限元软件对遇油膨胀封隔器在井下的密封性能进行研究,分析了胶筒长度和坐封环境温度对胶筒与井壁之间接触压力的影响。研究结果表明,随着胶筒长度的增加,胶筒与井壁之间的最大接触压力增加,但当胶筒长度增加到3.0 m后接触压力增加变缓;随着坐封环境温度的升高,胶筒与井壁之间的最大接触压力减小,且减小幅度较大。在塔河油田的应用结果表明,当遇油膨胀封隔器两端压力不高于90.00 MPa时,胶筒长度为3.0 m的遇油膨胀封隔器能够满足封隔地层要求,封隔器胶筒应力也低于橡胶材料的破坏极限。The sealing performance of packer rubber can directly restrict the operating performance of the pack- er. The key to research on packer rubber sealability is to study the maximum contact pressure between rubber and well wall. Therefore, the calculation model of swellpacker was established. The finite element software was used to study the downhole sealability of swellpacker. The effects of rubber length and setting environmental temperature on the rubber-wellface contact pressure were analyzed. The research findings show that with the increase of rubber length, the maximum contact pressure between rubber and wellface will increase. But when rubber length reaches 3 m, the increase of contact pressure slows down. With the increase of setting environmental temperature, the maxi- mum contact pressure between rubber and borehole wall will decrease. Moreover, the decrease is remarkable. The application in Tahe Oilfield shows that when the pressure on both ends of swellpacker is no more than 90.00 MPa, the swellpacker with the 3.0 m-long rubber can satisfy the formation pack-off requirement. The packer rubber stress is lower than the failure limit of rubber material.

关 键 词：遇油膨胀封隔器 胶筒长度 接触压力 密封性能 有限元分析 

分 类 号：TE931[石油与天然气工程—石油机械设备]