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| Numerical Simulation Method for Cathodic Protection Evaluation of HDD Pipeline |
| Received:August 21, 2020 Revised:September 15, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2020.11.005 |
| KeyWord:HDD cathodic protection numerical simulation CDEGS soil resistance evaluation method |
| Author | Institution |
| XU Hua-tian |
PetroChina Pipeline R&D Center, Langfang , China |
| YANG Wei |
China Petroleum Pipeline Engineering Corporation, Langfang , China |
| WEN Yu-fen |
PetroChina Pipeline Company, Langfang , China |
| BI Wu-xi |
PetroChina Pipeline R&D Center, Langfang , China |
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| Abstract: |
| 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. |
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