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

doi:10.3969/j.issn.1006-6535.2022.02.025

Abstract

Abstract: 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.

Key words: flange, oil and gas leakage, online leak sealing, leak sealing with sealant injection, oil and gas gathering

CLC Number:

TE866

Yu Miao, Dou Chao, Zhang Jianbing, Qi Peng, Chen Ping, Shi Tao. Study and Application of Hotwork-free Flexible Technology of Online Flange Leak Sealing with Sealant Injection for Oil and Gas Gathering System[J]. Special Oil & Gas Reservoirs, 2022, 29(2): 170-174.

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