摘要
为了适应海上油田大排量反洗井的要求,开发了液控扩张式封隔器可洗井分注技术。对扩张式封隔器胶筒材料进行了力学性能测试,并系统地进行了封隔器胶筒结构有限元分析技术的研究。研究结果表明,封隔器胶筒橡胶的应力-应变呈非线性关系,随着温度的升高,橡胶材料强度会变弱,在温度为65℃时橡胶材料强度达到最低,继续升高温度,橡胶材料强度又会增加;当封隔器处于内压20.0 MPa工作状态时,上、下胶筒座的应力水平最高,最大Mises应力为413.2 MPa;在胶筒中,外层胶筒两端应力水平最高,可达46.4 MPa,胶筒两侧应变能密度最大;封隔器处于工作状态时,其肩部变形最大,伴随着压力的增加,变形的趋势减缓,应变能密度与工作压力基本呈直线关系。所得结果可为扩张式封隔器的结构设计提供理论依据。
In order to meet the requirement for the large displacement inverse well flushing in offshore oil wells, a well clean-up and separate injection technology is developed by adopting a hydraulic expandable pack- er. The mechanical properties of the expandable packer rubber have been tested and the rubber sleeve structure has been systematically analyzed by using finite element analysis. The results show that the stress-strain relationship of the packer rubber sleeve is non-linear. As the temperature rises below 65℃, the strength of the rubber decreases and reaches a minimum point at the temperature of 65℃. While the temperature continues to rise, the rubber strength will increase. When the internal pressure of the packer is 20. 0 MPa, the upper and lower drift ring have the highest stress with the maximum Mises stress of 413.2 MPa. The ends of outer layer of the rubber sleeve have the maximum stress of up to 46. 4 MPa. The maximum strain energy density happens at the ends of the rubber sleeve. The maxi- mum deformations are at the packer shoulders when the packer is in working condition, and the deformation rate decreases with the increment of pressure. The deformation energy density has a linear relationship with the working pressure. The results of the study could provide a theoretical basis for the structural design of expandable packer.
出处
《石油机械》
北大核心
2014年第6期72-76,共5页
China Petroleum Machinery
基金
中国海洋石油总公司科技发展项目"海上分层注水井下洗井工艺技术研究"(C/KJF JDCJF001-2010)
关键词
扩张式封隔器
胶筒
钢丝帘线
有限元分析
应力
应变
力学性能
expandable packer
rubber sleeve
steel wire tirecord
finite element analysis
stress
strain
mechanical properties
