深海卧式采油树阴极保护研究与应用  

Research and Application of Cathodic Protection for Deep Sea Horizontal Christmas Tree

作　　者：余朋伟 任克忍 雷广进[1,2] 孙艳超 高妍 李晨 YU Pengwei;REN Keren;LEI Guangjin;SUN Yanehao;GAO Yan;LI Chen(National Oil&Gas Drilling Equipment Research Center,Baoji 721001,China;CNPC Baoji Oilfield Machinery Co.,Ltd.,Baoji 721001,China)

机构地区：[1]国家油气钻井装备工程技术研究中心,陕西宝鸡721001 [2]宝鸡石油机械有限责任公司,陕西宝鸡721001

出　　处：《石油化工腐蚀与防护》2020年第1期1-4,共4页Corrosion & Protection In Petrochemical Industry

基　　金：国家高技术研究发展计划(863计划)项目“水下卧式采油树系统研制”(2012AA09A204)

摘　　要：电化学腐蚀是长期浸泡在海水中的水下采油树最主要的失效形式之一,而阴极保护是深海卧式采油树最主要的保护手段,牺牲阳极的阴极保护在深海卧式采油树保护上更具有优势。根据牺牲阳极自放电测试、阴极保护参数模拟和实体结构建立的电位模型,采用“标准设计+计算机模拟”的方式,设计了深海卧式采油树阴极保护技术方案,并通过保护电位分布模拟计算和降低输出电流等方法完成了方案优化,测试结果表明:设计方案比较合理、防腐蚀效果良好。Electrochemical corrosion is one of the main failure modes of subsea Christmas tree immersed in the seawater for a long time. Cathodic protection is the most important protection method, and cathodic protection by sacrificial anode has more advantages in the protection of deep-sea horizontal Christmas tree. Based on the self-discharge test of sacrificial anode, cathodic protection parameter simulation and potential model established by its physical structure, cathodic protection technology scheme was designed by means of "standard design & computer simulation". Moreover, the scheme was optimized by simulation calculation of protection potential distribution and the reduction of output current. The sea trial results showed that the design scheme was reasonable and the anti-corrosion effect was remarkable.

关 键 词：采油树 阴极保护 防腐蚀 电位模拟 

分 类 号：TE985[石油与天然气工程—石油机械设备]