油气集输系统法兰免动火柔性带压注胶封堵技术研究与应用

Study and Application of Hotwork-free Flexible Technology of Online Flange Leak Sealing with Sealant Injection for Oil and Gas Gathering System

法兰密封失效是油气集输流程中常见的生产故障,其可导致油气集输系统非正常停产检修,经济损失巨大。为提高法兰密封失效的堵漏效率,研发了一种法兰免动火柔性带压注胶封堵技术。该技术采用柔性卡环包裹在发生泄漏的法兰外侧,建立新的密封结构,使用专业注胶工具,通过注胶孔向法兰之间的缝隙内注入密封胶体,实现带压封堵泄漏,具有安全、便捷、高效的特点,可在不改变工艺流程参数的前提下,高效快捷地解决法兰泄漏问题。实际应用证实其具有很好的实用性,值得推广应用。

Flange seal failure is a common failure in oil and gas gathering process,which can lead to abnormal shutdown and maintenance of oil and gas gathering system,with huge economic losses.In order to improve the plugging efficiency against flange seal failure,a hotwork-free flexible technology of online flange leak sealing with sealant injection was developed.Specifically,a flexible clamp externally wraps the leaking flange to establish a new sealing structure,and a professional injection tool is used to inject the sealant into the gap between the flanges through the injection hole to seal the leak under pressure.This technology is characterized by excellent safety,convenience and efficiency,and can address the flange leak efficiently and quickly without changing the process parameters.The practical application has proved that it is significant in promotion and application.