摘要
目的通过数值模拟的方法探索定向钻穿越管道的阴极保护评价。方法根据一条5130 m长度的定向钻穿越管道的实际参数,基于CDEGS软件计算方法,应用涂层耐受电压与电流密度的关系,计算定向钻管道浅埋层和岩石层中的管道的电位分布。结果通过调整土壤分层电阻率参数及土壤分层厚度进行计算,得到了定向钻穿越管道在分层土壤电阻率条件下的阴极保护电位分布规律。结论明确了土壤电阻率是影响定向钻管道电位分布的主要因素,形成了基于定向钻管道两端阴极保护电位和土壤分层电阻率,推导了整条定向钻穿越管道的阴极保护电位分布情况的评价方法。
The work aims to explore the cathodic protection evaluation of HDD pipeline through numerical simulation.According to the real parameters of a 5130 m HDD pipeline,the cathodic protection potential distribution of the HDD pipeline in the shallow buried layer and rock layer was calculated by the CDEGS software based on the relationship between coating withstand voltage and current density.By adjusting the soil layer resistivity parameters and soil layer thickness,the cathodic protection potential distribution law of HDD pipeline under layer soil resistivity condition was obtained.It is clear that the soil resistivity is the main factor affecting the potential distribution of the HDD pipeline,and an evaluation method for deriving the cathodic protection potential distribution of the entire HDD pipeline based on the cathodic protection potential at both ends of the HDD pipeline and the soil layer resistivity is formed.
作者
徐华天
杨威
温玉芬
毕武喜
XU Hua-tian;YANG Wei;WEN Yu-fen;BI Wu-xi(PetroChina Pipeline R&D Center,Langfang 065000,China;China Petroleum Pipeline Engineering Corporation,Langfang 065000,China;PetroChina Pipeline Company,Langfang 065000,China)
出处
《装备环境工程》
CAS
2020年第11期31-36,共6页
Equipment Environmental Engineering
基金
中石油管道有限责任公司科技攻关项目(2017B-3415-0507)。
