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首页> 外文期刊>Advances in Mechanical Engineering >Viscoelastic behavior of a casing material and its utilization in premium connections in high-temperature gas wells:
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Viscoelastic behavior of a casing material and its utilization in premium connections in high-temperature gas wells:

机译：套管材料的粘弹性行为及其在高温气井优质连接中的利用：

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At the high or extra-high temperatures in a natural gas oilfield, where the premium connection is employed by casing, gas leakage in the wellbore is always detected after several years of gas production. As the viscoelastic material’s mechanical properties change with time and temperature, the relaxation of the contact pressure on the connection sealing surface is the main reason for the gas leakage in the high-temperature gas well. In this article, tension-creep experiments were conducted. Furthermore, a constitutive model of the casing material was established by the Prony series method. Moreover, the Prony series’ shift factor was calculated to study the thermo-rheological behavior of the casing material ranging from 120°C to 300°C. A linear viscoelastic model was implemented in ABAQUS, and the simulation results are compared to our experimental data to validate the methodology. Finally, the viscoelastic finite element model is applied to predict the relaxation of contact pressure on the premium connec.
机译：在天然气油田的高温或超高温情况下，套管采用优质连接，在生产了数年的天然气之后，总会发现井眼中的气体泄漏。由于粘弹性材料的机械性能随时间和温度而变化，因此连接密封面上接触压力的松弛是高温气井中气体泄漏的主要原因。在本文中，进行了张力蠕变实验。此外，通过Prony级数法建立了套管材料的本构模型。此外，计算了Prony系列的位移因子，以研究套管材料在120°C至300°C范围内的热流变行为。在ABAQUS中实现了线性粘弹性模型，并将模拟结果与我们的实验数据进行了比较，以验证该方法。最后，将粘弹性有限元模型应用于预测溢流接头上接触压力的松弛。

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