RESEARCH ARTICLE


Optimization and Stress Analysis of Underground Oil Pipelines in High and Steep Slope Areas



Kun Huang1, Jin Wu *, 1, Meilin Hu2, Han Xiang3, Zhihao Zhang1
1 School of Petroleum Engineering, Southwest Petroleum University, Chengdu, China
2 PetroChina Kunlun Gas Ltd. of Yunnan, Kunming, China
3 Chengdu E Ga Petroleum Engineering Technology Co., LTD of Sichuan, Chengdu, China


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Creative Commons License
© 2015 Huang et al;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the School of Petroleum Engineering, Southwest Petroleum University No. 8, XinduRoad, Xindu District, Chengdu, Sichuan Province China; Tel:13648015885; E-mails: casiou@163.com, 821679058@qq.com


Abstract

Underground oil pipelines are made of pressurized pipes, and when damage occurs, the consequences can be disastrous. Pipeline accidents caused by stress can be attributed to material corrosion, impractical design, manufacturing defect, environmental damage, and man-made destruction. In this study, by utilizing the stress analysis software CAESAR II, the stress of pipelines in high and steep slope areas was analyzed under the same operating conditions and different piping technologies. Comparing the different simulation consequences of each pipeline technology, an optimized laying process was proposed to reduce the stress of underground oil pipelines in high and steep slope areas; this process was named Sectional Pipe Laying Process. According to the results of CAESAR II, the stress and movement of underground oil pipelines in high and steep slope areas were drastically reduced and the safety greatly enhanced.

Keywords: CAESAR II , high and steep slope areas, stress, underground oil pipeline.