Analysis of Thermo-mechanical Coupling Characteristics of Supporting Materials in Insulating Layer of Insulating Oil Pipe
In the process of steam injection thermal recovery in heavy oil recovery,insulated tubing can effectively reduce the radial heat transfer loss in the wellbore.In actual production,the supporting material(glass fiber)in the insulating oil pipe is damaged after being used for a period of time,resulting in increased heat loss and affecting the thermal recovery effect of heavy oil.It needs to be further studied to screen better supporting materials and enhance the performance of thermal insulation tubing.In this paper,the multi-physics field coupling model of the supporting material was established,and the actual simulation calculation was carried out for the glass fiber,carbon fiber and composite glass fiber materials.Based on this,the temperature,stress and displacement characteristics of the support material were analyzed.The results showed that the composite glass fiber Mises stress was the largest,the glass fiber was the second,and the carbon fiber was the smallest.It was recommended that the composite glass fiber should be used as the support material for the heat insulation pipe.This study provides some support for extending the service life of insulated tubing and improving the recovery effect of heavy oil.
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