In offshore oil and gas engineering, pipeline abandonment is unavoidable and its mechanical analysis is necessary and important. For this problem, a numerical model is developed in this study to evaluate pipeline abandonment for the J-laying method. The whole system considered in this model is divided into two parts: the A&R cable and the pipeline in the water. A catenary model was proposed for the former, and the latter is solved by a numerical iterative method. In addition to the boundary conditions at the two end points, a special set of boundary conditions is required at the junction that connects the cable and the pipeline. Furthermore, a parametric study is performed to study the effect of the length of the pipeline, the horizontal distance between the two end points, the pipe-cable length ratio, and the depth of water on the pipeline abandonment. The proposed model can help develop deepwater pipeline abandonment and analysis.
Han, Duanfeng; Huang, Kuo; Zan, Yingfei; and Wu, Zhaohui
"A NUMERICAL MODEL FOR PIPELINE ABANDONMENT IN DEEP WATER,"
Journal of Marine Science and Technology: Vol. 25:
6, Article 17.
Available at: https://jmstt.ntou.edu.tw/journal/vol25/iss6/17