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Inlet pressure simulation of pigging in uphill gas pipeline

机译：上坡燃气管道中排水的入口压力模拟

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摘要

Pipe cleaning is a common operation in the oil and gas industry. In this paper, the governing equation of the pipeline inspection gauge (PIG, lowercase pig is commonly used) speed is combined with the gas flow equations. The method of characteristics (MOC) is used to solve the transient equations of gas flow. And the process of a pig passing over an uphill section of a gas pipeline is simulated. The results indicate that a pig may get stuck in uphill gas pipeline, due to the coupling of the gas and the pig. Under these circumstances, a higher pressure of the upstream could be helpful for driving the pig in motion. Additionally, the ratio of inlet pressure rise during the pigging process is primarily determined by the inclination of the uphill section. In addition, a formula to predict the inlet pressure during pigging in an uphill pipe is presented. Furthermore, the proposed method and solution can be utilized to predict the speed and position of the pig, as well as the gas pressure and the stoppage of the pig in hilly gas pipelines.
机译：管道清洁是石油和天然气行业的常见操作。在本文中，管道检查量表（猪，小写猪是常用）速度的控制式等式与气流方程相结合。特性（MOC）的方法用于解决气体流动的瞬态方程。模拟了通过燃气管道上坡部分的猪的过程。结果表明，由于气体和猪的偶联，猪可能会被困扰着umlill气体管道。在这种情况下，上游的更高压力可能有助于在运动中驱动猪。另外，流动过程中的入口压力升高的比率主要由上坡部分的倾斜度决定。另外，提出了一种公式，以预测在上坡管中进行排出期间的入口压力。此外，可以利用所提出的方法和解决方案来预测猪的速度和位置以及丘陵气体管道中猪的气体压力和猪的停止。

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