清管预膜控制速度研究  

Study on controlling velocity of pigging pre-film operation

作　　者：汪枫 罗驰[2] 阳梓杰[2] 徐莹莹 李珊 Wang Feng;Luo Chi;Yang Zijie;Xu Yingying;Li Shan(Research Institute of Natural Gas Technology,PetroChina Southwest Oil&Gasfield Company,Chengdu, Sichuan,China;Chongqing Gas District of PetroChina Southwest Oil&Gasfield Company,Chongqing,China)

机构地区：[1]中国石油西南油气田公司天然气研究院 [2]中国石油西南油气田公司重庆气矿

出　　处：《石油与天然气化工》2018年第2期85-88,共4页Chemical engineering of oil & gas

摘　　要：针对清管预膜作业中预膜球控制速度对气量要求较高,不能适应大部分管道的现状,利用电化学方法,研究了高含硫体系中缓蚀剂的成膜时间,并由此推导出预膜球的控制速度计算方法。将该计算方法应用于现场试验,预膜后腐蚀挂片及缓蚀剂残余浓度监测结果表明,采用优化后的预膜控制速度进行管道清管预膜,预膜效果良好。Aiming at the situation that control the speed of preparing membrane ball needs a high requirement on gas volume in pigging pre-film operation which cannot adapt to most pipelines,a calculation method of membrane ball’s velocity has been derived on the base of film forming time of corrosion inhibitor in high-sulfur system by electrochemical method.The calculation method is applied in the field,and the monitoring results of remained concentration of corrosion inhibitor and corrosion coupon show that pre-filming has a good effect after adopting optimized controlling velocity of pigging pre-film.

关 键 词：输气管道 清管预膜 缓蚀剂 残余浓度 

分 类 号：TE832.36[石油与天然气工程—油气储运工程]