石油钻井井控设备法兰金属垫环连接系统密封完整性研究综述OA

As oil and gas exploration and development activities extend to ultra-deep formations,well control risks rise correspondingly.Well control flanges work under long-term ultra-high pressure service conditions and are frequently subjected to pressure fluctuations,which easily trigger sealing leakage and jet leakage accidents.Therefore,ensuring the sealing integrity of flange connection systems is of great engineering significance.In this study,the failure causes of sealing integrity for well control flange connections are statistically analyzed based on literature review,field technical exchanges and on-site investigations.This paper systematically summarizes the relevant standards and basic theories of flange sealing connections,clarifies the application status and existing limitations of BX metal ring gaskets under high pressure and ultra-high pressure working conditions,and comprehensively reviews the domestic and international research progress on sealing failure mechanisms of bolted flange joints with metal ring gaskets from the perspectives of structural integrity and functional integrity of flange connection systems.Meanwhile,this paper discusses the innovative structural design of flange connections and the research development of novel gasket materials adapted to ultra-high pressure service conditions,and identifies the key unsolved bottlenecks in current sealing integrity research.The mainstream detection technologies for metal flange sealing connections are sorted out;besides,a comparative analysis is conducted on advanced international well integrity management systems.This paper further discusses the major difficulties in the full-cycle integrity management of metal flange sealing structures,and puts forward targeted optimization suggestions for sealing integrity management.The research aims to promote the intelligent development of drilling well control technology,and provide technical support for national energy security guarantee.