论文部分内容阅读
本文对真空隔热油管的隔热性能主要影响因素及失效机理进行了分析,并提出了改善隔热性能与延长使用寿命的解决思路。保证隔热层具有一定的真空度是维持隔热油管隔热性能的核心,氢气渗透、管材气体脱附、油管机械破坏等因素都会使得隔热层真空度下降,减弱隔热性能。氢气主要来源于钢材的析氢腐蚀和原油裂解等。本文根据对隔热性能主要影响因素的分析提出了一些解决思路,以期减缓其隔热性能下降速度,延长隔热油管使用寿命,提高稠油热采的热效率和经济性。
In this paper, the main influencing factors and failure mechanism of the vacuum insulation tubing are analyzed, and the solutions to improve the insulation performance and extend the service life are put forward. Ensure that the insulation layer has a certain degree of vacuum insulation core is to maintain the insulation performance of the core, hydrogen penetration, pipe gas desorption, tubing and other mechanical damage will make the insulation layer of vacuum decreases, reducing the insulation performance. Hydrogen mainly from the hydrogen evolution of steel corrosion and cracking of crude oil. Based on the analysis of the main influencing factors of thermal insulation performance, some solutions are put forward in this paper in order to slow down the declining rate of thermal insulation performance, prolong the service life of thermal insulation tubing and enhance the thermal efficiency and economy of heavy oil thermal recovery.