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温度变化对压裂用封隔器胶筒密封性能的影响
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天津市自然科学基金重点项目(17JCZDJC38800).


Influence of Temperature Variation on Sealing Performance of Compressed Packer Rubber
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    摘要:

    利用ABAQUS分析软件建立封隔器胶筒的有限元模型,分析相同工作载荷及不同工作温度下,胶筒与套管间接触应力及其沿轴向的分布规律;分析升温和降温2种情况下温度对胶筒密封性能的影响,以及考虑胶筒发生扭转时温度对密封性能的影响。结果表明:轴向载荷不变时,随着温度的升高,胶筒的密封性能也随之提高;升温时,除起始温度低于0 ℃以外,其各温度下升温的温差幅度越大,胶筒的最大接触应力增加幅度越大,胶筒的密封效果越好;降温时,降温的温差幅度越大,胶筒的最大接触应力减小的幅度越大,胶筒的密封性能越差;小角度扭转载荷下,作业温度的升高将提高胶筒的密封性能,但会降低胶筒密封的稳定性。

    Abstract:

    The ABAQUS analysis software was used to establish the finite element model of the packer rubber.The contact stress between the rubber and the casing and its distribution along the axial direction at different working temperatures and the same working load were analyzed.Taking into account the changes of the temperature during the downhole operating at actual conditions,the sealing characteristics of the rubber were analyzed under two conditions of temperature increase and temperature decrease.The sealing performance of the rubber was also analyzed when considering the different torsion occurred in the rubber at different temperatures under actual operating conditions.The results show that the sealing performance of the rubber is increased with the increase of temperature when the load is constant.When the temperature is raised, except that the initial temperature is lower than 0 ℃,the greater the temperature difference is,the greater the increase of the maximum contact stress of the rubber,and the better the sealing performance of the rubber.When cooling,the greater temperature difference is,the greater the decrease of the maximum contact stress of the rubber,and the worse the sealing performance of the rubber.At a small angle twist,the increase of operating temperature will improve the sealing performance of the rubber,but will decrease the stability of the rubber.

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张付英,水浩澈,张玉飞,董城城,李天天,杨俊梅.温度变化对压裂用封隔器胶筒密封性能的影响[J].润滑与密封,2019,44(7):35-40.
. Influence of Temperature Variation on Sealing Performance of Compressed Packer Rubber[J]. Lubrication Engineering,2019,44(7):35-40.

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  • 在线发布日期: 2020-03-12
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