Testing backfill's thermal conductivity improves operations

Yutian Li Changchun Wu Xiaokai Xing China University of Petroleum Beijing Dan Dou CNPC Niger Petroleum SA Niamey, Niger Yang Yu China University of Petroleum Beijing Increases in backfill soil's thermal conductivity can cause sharply higher heating station fuel costs on heavy oil crude pipelines because the higher conductivity requires a higher initial temperature to keep the crude's terminal temperature stable. Excavation and filling change not only the compactness and water content of backfill soil, but also its thermal conductivity. Backfill soil's thermal conductivity in turn affects the cooling of a hot oil pipeline, and through this, its energy consumption, safety, and budget. ...

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