Thermodynamic Calculation and Analysis on Buried Multiple-Phase Transportation Pipeline

In the light of the issue that higher operating temperature in buried multiple-phase pipeline's transportation will lead to a raise of operating cost for oil gathering systems in oilfields, equations for pipeline temperature dropping down, amount of mixed hot water and temperature of mixed hot water are derived based on the thermodynamic principle. By means of a computer program developed, operation technological parameters of buried multiple-phase transportation pipeline are confirmed.