关键词: 原油输送, 流体流动, 热力计算, 降凝剂

Abstract: By analyzing force state and flow status of fluid in the large drop in height pipeline, it is pointed out that there might be three flow patterns in the large drop in height pipeline, which are respectively unfilled in unstable flow in variable velocity, unfilled in stable flow in uniform velocity and full pipe stable flow in uniform velocity. In order to simulate the heat and shear processes which crude oil will experience in the large drop in height pipeline,the variation regularities of oil temperatures and flow parameters in above mentioned three flow patterns and corresponding calculation formulas have been derived, which will provide theoretical and experimental basis for studying the stability of crude oil with depressant flowing through the large drop in height pipeline. Actual calculations have been done by using relevant physical parameters of crude oil in a certain large drop in height pipeline and results are reasonable.

Key words: oil transportation, fluid flow, thermodynamics calculation, oil depressant