【摘要】 高温油气生产引起井筒周围温度全面上升,密闭的套管环空流体受热膨胀,对套管内外表面施加附加压力,这种压力可以达到套管的抗内压或抗外挤强度极限。针对温度升高带来的套管附加载荷使油气井的生产存在很大安全隐患的问题,归纳总结了多种因温度升高而带来套管附加载荷的预防方法,并从他们的应用范围、可靠性还有使用费用三方面进行对比,建立了两种最优套管附加载荷预防方法的计算模型,给出了实际工况下套管附加载荷的预防操作方法。更多还原

【Abstract】 With the development of petroleum industry, especially exploitation of offshore oil and gas, many high temperature oil-gas wells appear, liquid produced from these wells makes temperature increase fast around the casing, liquid sealed in annulus will expand with high temperature and force an additional load to annulus. The additional pressure will reach internal pressure strength and collapse resistance of casing, so the additional load caused by high temperature oil and gas brings many safety questions. Authors of this paper summarize several methods to prevent the additional load of casing duo to increasing temperature, make comparison by their scope of application, reliability and cost, and establish two kinds of additional load prevention models. According to both models, the authors give feasible measure to prevent the additional load mentioned above.更多还原