Restart time correlation for core annular flow in pipeline lubrication of high-viscous oil

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• 作者：Aniefiok Livinus ; Hoi Yeung ; Liyun Lao
• 关键词：CAF ; Heavy oil ; Restart ; Water assist flow ; Pipeline transport
• 刊名：Journal of Petroleum Exploration and Production Technology
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：7
• 期：1
• 页码：293-302
• 全文大小：1184KB
• 刊物主题：Geology; Industrial and Production Engineering; Energy Technology; Offshore Engineering; Industrial Chemistry/Chemical Engineering; Monitoring/Environmental Analysis;
• 出版者：Springer Berlin Heidelberg
• ISSN：2190-0566
• 卷排序：7

文摘

One of the fundamental questions that must be addressed in the effective design and operation of pipeline lubrication of heavy oil is; “how much time will be needed to restart a blocked core annular flow (CAF) line after shutdown due to fouling or pump failures”, if the pipe is to be cleaned using water only. In this work, laboratory results of shutdown and restart experiments of high-viscous oil conducted in a 5.5-m-long PVC horizontal pipe with internal diameter of 26 mm are first presented. A new correlation for the prediction of the restart time of a shutdown core annular flow line is then formulated. The predictive capabilities of the correlation are checked against measured restart time and pressure drop evolution data. Somewhat high but still reasonable predictions are obtained. The restart time correlation, together with the associated correlations formulated as well, can be of practical importance during the engineering design of high-viscous oil pipeline transportation facility for predicting restart process.