摘要
以Y341-114型封隔器为研究对象,应用有限元法分析压缩式封隔器胶筒受力状况及密封能力。采用有限元软件ABAQUS平台,建立了封隔器胶筒有限元模型,开展了封隔器力学行为的数值模拟。研究结果表明:在封隔器坐封和工作阶段,轴向载荷和摩擦力基本呈线性关系,摩擦因数较小时,摩擦力随着摩擦因数的增加上升很快、接触应力则下降较快;胶筒和套管之间接触应力随工作压力、轴向载荷的增大而增大,当轴向载荷一定时,上胶筒在靠近隔环处为最大接触应力点。该研究为封隔器有效密封、延长封隔器使用寿命提供了理论支持。
Taking Y341-114 packer as a research object,the force stress and sealing capacity for the compressive packer rubber have been analyzed by applying the finite element method.By using the finite element software ABAQUS platform,the finite element model of packer rubber was established to carry out the numerical simulation of mechanical behavior for packers.The results showed that the axial load was basically in linear relationship with friction force in the phase of packers' setting and work stage.When friction coefficient was small,friction force increased rapidly and contact stress decreased sharply with the increase of friction coefficient.The contact stress between rubber and the casing increased with the increase of working pressure and axial load.When the axial load was constant,the upper part of rubber near the spacer ring was the maximum contact stress point.The research provides theoretical support for effective sealing and prolonging service life of packers.
引文
[1]宋考平,宋洪才,吴文祥.油藏数值模拟理论基础[M].北京:石油工业出版社,1994.
[2]高立峰,费明,刘雅红.应用有限元分析法分析热采井套管柱应力[J].科学技术与工程,2012,29(12):232-236.
[3]王奎,李广永,张建.偏心分注井投捞测配验封测试工艺及施工过程中常见问题探讨[J].油气井测试,2011,20(4):38-40.
[4]姚超,王益轩,孙蕊,等.油管的生产封隔器腐蚀穿孔模拟分析[J].现代机械,2016(3):74-76.
[5]常成,易先中,张锦洲,等.新型Y342封隔器的研制[J].机械工程师,2016(4):72-74.
