| 摘要 |
Carbon dioxide is injected into a surface pipeline to maintain a pressure near that required to form a two two-liquid phase hydrocarbon-carbon dioxide system. The two-liquid phase region is placed as a slug between two hydrocarbons to be transported within the pipeline. The two-liquid phase slug prevents the mixing of the hydrocarbons being pipelined. The slug material exhibits a lower viscosity than the flowing hydrocarbons so that it flows in the turbulent regime causing a cleansing action in the pipeline and also reducing the extend of its own tailing. Upon effluence from the pipeline the carbon dioxide may be vented to the atmosphere to separate it from the hydrocarbons.
|
