双金属复合管引流式夹具注脂堵漏抢修技术研究  

Research on the Grease Injection Leak Stoppage and Emergency Repair Technology with Drainage-Type Clamps for Bimetallic Clad Pipes

作　　者：张晓峰[1] ZHANG Xiaofeng(No.1 Operation Area of No.1 Oil Production Plant,Daqing Oilfield Co.,Ltd.)

机构地区：[1]大庆油田有限责任公司第一采油厂第一作业区,黑龙江省大庆市163113

出　　处：《油气田地面工程》2024年第9期100-105,共6页Oil-Gas Field Surface Engineering

摘　　要：在油气长距离输送管线中,双金属复合管有良好的防腐作用,目前应用最为广泛,然而内衬刺漏和塌陷问题时有发生,是制约管道完整性和生产连续性的隐患,因管道结构的特殊性,现有的双金属复合管现场堵漏抢修技术无法对内衬层失效问题进行深层次修复,从根本上阻隔腐蚀源。基于双金属复合管结构特点及刺漏缺陷几何特征,试验和完善了双金属复合管引流式夹具注脂堵漏抢修技术手段,通过对引流式补强套筒、对开式卡具修复、带压开孔及封堵等作业的工具及设计方案的研究论证,建立了复合管引流式夹具注脂堵漏抢修的完整性方法,具有不动火、安全性高、抢修周期短和带压不停输的优点。样管堵漏后,夹具内壁和管道之间的空腔完全填充密封脂,可以彻底阻隔腐蚀源,当运行压力达到15 MPa时,无泄漏,循环2次加压和降压后,未发生渗漏或泄漏,最后通过对填充样进行工业CT扫描,内部塌陷填充效果良好,能够防止管道发生内衬刺漏后腐蚀介质进一步腐蚀基管。The bimetallic clad pipe is the most widely used in long-distance oil and gas transmission pipelines for its high corrosion resistance.However,unavoidable lining leakage and collapse are restricting the pipeline integrity and the production continuity,as the on-site plugging and repairing technology of bimetallic clad pipes in existence unable to carry out thorough repair or fundamentally block the corrosion due to the particularity of the pipeline structure.Based on the structural characteristics of bimetallic clad pipes and the geometric characteristics of leakage defects,the grease injection leak stoppage and emergency repair technology with drainage-type clamps for bimetallic clad pipes has been tested and improved.Through the research on tools and schemes for the operations such as drainage-type reinforcement of sleeves,repair of split-type clamp,pressurized opening and sealing,an integrity method for grease injection leak stoppage and emergency repair technology with drainage-type clamps for bimetallic clad pipes has been established,which has the advantages of no open flame,high safety,short repairing cycle,and transmission without shutdown or depressurization.The research work shows that the cavity of the sample pipe between the inner wall of the clamp and the pipeline is completely filled with sealing grease,blocking the source of corrosion.No leakage was found when the operating pressure reached 15 MPa or after 2 cycles of pressurization and depressurization.Through the industrial CT scanning images of the filled samples,the internal collapse filler functions well,and can be assumed effective in the prevention of further corrosion from lining puncture leakage.

关 键 词：双金属复合管 夹具 注脂 堵漏 

分 类 号：TE988.2[石油与天然气工程—石油机械设备]