中文摘要：

真空隔热套管是近年来研制成功的新型油井套管,地面测试结果证明其具有良好的隔热性能。但是,将其应用于稠油热采油井形成的隔热套管井筒是否能够满足稠油热采需要,尚需对其强度状况及井筒隔热情况进行深入研究。该文以稠油热采过程中的实际注蒸汽数据为基础,在井筒传热计算结果基础上,结合真空隔热套管结构及完井井筒结构,利用热弹性力学理论,对真空隔热套管井筒套管的内管、外管强度分别进行了计算、分析,利用内外管在不同井深处的应力计算结果,得出了井深、注蒸汽温度等因素对真空隔热套管井筒安全的影响规律。从而为真空隔热套管的正确使用及进一步完善提供了理论依据,也为实施正确的固井工艺提供了参考。

英文摘要：

Vacuum insulated casing is a new oil well casing developed in recent years,and its good insulation properties have been proved by the results of ground tests. But it remians unadressed whether it can work as insulated casing for heavy oil thermal recovery. So it is necessary to study the strength and insulation characteristics of the casing. Based on the data of actually adopted steam,results of well casing heat transfer,vacuum insulated casing＇s structure and thermal elasticity theory,the internal and external strength of vacuum insulated casing is calculated. The stresses of internal and external casing at different depths are calculated,and the factors influencing the safety of vacuum insulated casing are identified,including well depth,injected stream＇s temperature. This research provides theoretical basis for proper use and further improvement of vacuum insulation casing,and a reference for the correct implementation of the cementing process.