摘要
端部弹簧式封隔器胶筒作为一种新型设计的井下密封工具,为验证该工具能否达到40 MPa的密封设计要求,得到该工具在不同环境围压和坐封载荷下对胶筒密封性能的影响规律进行了仿真分析。仿真分析采用有限元分析的理论,借助物理实验确定弹簧和橡胶的仿真参数,采用轴对称的分析方法对建立的简化等效有限元模型进行分析计算。分析结果表明,在10~50 MPa环境围压载荷下,中胶筒的密封压力变化量只有0.27 MPa,环境围压载荷对胶筒密封性能影响很小。通过分析计算4个不同的坐封载荷得到坐封载荷和胶筒密封压力的关系曲线,并得到坐封载荷在大于8 t的情况下能够达到密封40 MPa设计要求的结论,为后续的现场试验施工和结构优化提供了理论支撑依据。
As a newly designed downhole sealing tool,the end spring type packer rubber cylinder was simulated and analyzed to verify whether the tool could meet the sealing design requirements of 40 MPa under different environmental confining pressures and sitting and sealing loads on the sealing performance of the rubber cylinder.The simulation analysis adopted the theory of finite element analysis,determined the simulation parameters of spring and rubber by physical experiments,and used the axisymmetric analysis method to calculate the simplified equivalent finite element model.The analysis results showed that under the range of 10-50 MPa environmental confining pressure loads,the sealing pressure change of the middle rubber cylinder was only 0.27 MPa,and the impact of environmental confining pressure load on the sealing performance of the rubber cylinder was very small.Through analysis and calculation of four different sitting and sealing loads,the relationship curves between the sealing load and the sealing pressure was obtained,and the conclusion that the sitting and sealing load can meet the design requirements of 40 MPa under the condition of more than 8 t was obtained,providing theoretical support basis for the subsequent field test construction and structure optimization.
作者
张福涛
Zhang Futao(Research Institute of Petroleum Engineering Technology,Sinopec Shengli Oilfield Branch,Dongying 257000,China)
出处
《能源与环保》
2024年第9期232-236,共5页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
中国石化科技攻关项目(P23126)。
关键词
弹簧胶筒
氢化丁腈橡胶
环境围压
坐封载荷
spring rubber cylinder
hydrogenated nitrile rubber
environmental confining pressure
sitting and sealing load
