针对海上稠油热采井注入多元热流体过程中保护上部套管和结束后压井作业避免压井液进入地层吸收地层热量、降低压井作业时间,采用了一种在高温高压的井下能开关的防污染隔热桥塞,但应用效果并不理想,底阀开关不灵活,密封性不严,不能正常回收,冲蚀等因素,导致后续动管柱作业复杂化,本文对海上应用实例进行分析和探讨,为后期管柱优化提供依据。 Aimed at the protection of the upper casing and the post-kill operation during the injection of multi-thermal fluid into the heavy oil thermal recovery well in the sea, the well killing fluid can be avoided to get into the formation to absorb the heat of the formation and reduce the well killing time. A downhole switch capable of switching at high temperature and high pressure Of the anti-pollution insulation bridge plug, but the application effect is not ideal, the end of the valve switch is not flexible, tightness, can not be properly recycled, erosion and other factors, resulting in the subsequent operation of the moving pipe complex, this article examples of offshore applications Analysis and discussion, to provide the basis for post-column optimization.