完井封隔器卡瓦和胶筒力学行为分析及结构优化设计
发布时间：2019-05-10 13:47
【摘要】：在实际生产中完井封隔器有时会发生卡瓦牙断裂、卡瓦对套管过度损坏、胶筒破损脱落等导致封隔器封隔失效的安全事故。因此本文以THT完井封隔器为研究对象,针对封隔器卡瓦和胶筒进行分析研究。文中采用理论研究和有限元模拟两种方法对封隔器卡瓦和胶筒进行分析。根据静力学理论分析卡瓦坐封后应力状态,得到卡瓦牙的接触应力公式;运用有限元软件模拟卡瓦坐封过程,有限元分析结果显示:卡瓦与套管接触应力沿轴向和环向分布均不均匀,卡瓦牙发生塑性变形;由卡瓦接触应力影响因素有限元分析结果可知,卡瓦牙顶角α在75°—80°,牙倾角β在65°—70°,卡瓦楔形角γ在10°—15°时卡瓦接触应力状态最优。同理,运用材料力学和弹塑性力学相关理论求得了胶筒在自由变形阶段和约束变形阶段的应力状态,推导出胶筒在此两阶段下的压缩量公式以及接触应力公式;运用有限元软件对胶筒进行数值模拟,得到胶筒接触应力分布规律:接触应力沿轴向分布不均匀,上胶筒最大,下胶筒最小;由胶筒接触应力因素有限元分析结果可知,胶筒接触面倾角在75°-80°,胶筒高度选择端胶筒40—50mm,中间胶筒50—60mm的组合方式,加载方式选取双向加载时胶筒接触应力状态最优。
[Abstract]:In the actual production, the seal failure of the Packer will sometimes occur, such as the excessive damage to the casing and the breakage and shedding of the rubber cylinder, which will lead to the failure of the Packer sealing. Therefore, this paper takes THT completion Packer as the research object, and analyzes and studies the Packer pad and rubber cylinder. In this paper, theoretical research and finite element simulation are used to analyze the Packer tile and rubber cylinder. According to the statics theory, the stress state of kava after sealing is analyzed, and the contact stress formula of kava teeth is obtained. The finite element software is used to simulate the sealing process of the kava. The results of finite element analysis show that the contact stress between the kava and the casing is uneven along the axial and circumferential direction, and the plastic deformation of the kava teeth occurs. According to the finite element analysis of the influencing factors of kava contact stress, it can be seen that the contact stress state of kava tooth is the best when the top angle 伪 is 75 掳- 80 掳, the inclination angle 尾 is 65 掳- 70 掳, and the kava cuneiform angle is 10 掳- 15 掳. In the same way, the stress state of the rubber tube in the free deformation stage and the constrained deformation stage is obtained by using the related theories of material mechanics and elastic-plastic mechanics, and the compression quantity formula and the contact stress formula of the rubber tube under these two stages are derived. The finite element software is used to simulate the rubber tube, and the distribution law of contact stress is obtained: the contact stress distribution is uneven along the axial direction, the upper rubber tube is the largest, and the lower rubber tube is the smallest; According to the finite element analysis results of the contact stress factors of the rubber tube, it can be seen that the inclination angle of the contact surface of the rubber tube is 75 掳- 80 掳, and the height of the rubber tube is 40-50 mm at the end of the rubber tube, and the combination mode of the middle rubber tube 50-60mm is selected. When the loading mode is bi-directional loading, the contact stress state of the rubber cylinder is the best.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE925.3
本文编号：2473691
[Abstract]:In the actual production, the seal failure of the Packer will sometimes occur, such as the excessive damage to the casing and the breakage and shedding of the rubber cylinder, which will lead to the failure of the Packer sealing. Therefore, this paper takes THT completion Packer as the research object, and analyzes and studies the Packer pad and rubber cylinder. In this paper, theoretical research and finite element simulation are used to analyze the Packer tile and rubber cylinder. According to the statics theory, the stress state of kava after sealing is analyzed, and the contact stress formula of kava teeth is obtained. The finite element software is used to simulate the sealing process of the kava. The results of finite element analysis show that the contact stress between the kava and the casing is uneven along the axial and circumferential direction, and the plastic deformation of the kava teeth occurs. According to the finite element analysis of the influencing factors of kava contact stress, it can be seen that the contact stress state of kava tooth is the best when the top angle 伪 is 75 掳- 80 掳, the inclination angle 尾 is 65 掳- 70 掳, and the kava cuneiform angle is 10 掳- 15 掳. In the same way, the stress state of the rubber tube in the free deformation stage and the constrained deformation stage is obtained by using the related theories of material mechanics and elastic-plastic mechanics, and the compression quantity formula and the contact stress formula of the rubber tube under these two stages are derived. The finite element software is used to simulate the rubber tube, and the distribution law of contact stress is obtained: the contact stress distribution is uneven along the axial direction, the upper rubber tube is the largest, and the lower rubber tube is the smallest; According to the finite element analysis results of the contact stress factors of the rubber tube, it can be seen that the inclination angle of the contact surface of the rubber tube is 75 掳- 80 掳, and the height of the rubber tube is 40-50 mm at the end of the rubber tube, and the combination mode of the middle rubber tube 50-60mm is selected. When the loading mode is bi-directional loading, the contact stress state of the rubber cylinder is the best.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE925.3
【参考文献】
相关期刊论文 前10条
1 刘天良,施纪泽;封隔器封隔时胶皮筒接触应力的模拟试验研究[J];断块油气田;2000年04期
2 杜常桥;李世民;吕宏茹;;封隔器胶筒应力数值模拟与结构优化研究[J];断块油气田;2008年02期
3 杨秀娟;闫相祯;贾善坡;;封隔器胶筒大变形的粘—滑摩擦接触分析[J];机械强度;2006年02期
4 吴军;;封隔器卡瓦损伤套管数值模拟分析[J];内蒙古石油化工;2010年10期
5 李晓芳,杨晓翔,王洪涛;封隔器胶筒接触应力的有限元分析[J];润滑与密封;2005年05期
6 君轩;;应力松弛[J];世界橡胶工业;2010年08期
7 伍开松;佘月明;张新政;叶永彪;;用接触有限元研究胶筒系统的力学行为[J];石油矿场机械;2006年03期
8 王海兰;辜利江;刘清友;;井下封隔器胶筒橡胶材料力学性能试验研究[J];石油矿场机械;2006年03期
9 刘永辉;付建红;林元华;白亮清;杨景中;魏志学;徐海涛;马海云;;封隔器胶筒密封性能有限元分析[J];石油矿场机械;2007年09期
10 李旭;窦益华;;压缩式封隔器胶筒变形阶段力学分析[J];石油矿场机械;2007年10期
相关硕士学位论文 前1条
1 王海兰;井下封隔器工作行为仿真研究[D];西南石油学院;2004年
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