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- W2024279272 abstract "Abstract The gas-liquid flow phenomenon is frequently encountered during Coiled Tubing (CT) applications, especially in underbalanced drilling. In the wellbore, the flow takes place in more complex geometry than pipe flow. The determination of the pressure losses is the major concern prior to estimate the hydraulic system requirements as well as hole cleaning efficiencies and the drilling performances. The most commonly used mechanistic models are developed for two-phase pipe flow and the hydraulic diameter concept is generally applied to adapt the annular geometry to pipe flow. However, in case of two-phase flow through fully eccentric horizontal annuli, the complexity of the geometry couples with the difficulty of the physics of two-phase flow. In this study, friction factor correlations are proposed in order to calculate the pressure losses of two-phase systems flowing through fully eccentric annuli. The data used in this study, including pressure drop, flow rates, temperature and flow patterns, is obtained using the METU-PETE-CTFL multiphase flow loop. The collected data is analyzed and using statistical methods, friction factors are obtained both for considering different flow patterns as well as ignoring the flow patterns. The results showed that, the proposed friction factors for both methodologies could estimate the frictional pressure losses with an accuracy of less than 7% for all cases. The accuracy and the simplicity of the proposed methodology provide promising solutions to frictional pressure loss estimations of two-phase flow at the horizontal sections of CT." @default.
- W2024279272 created "2016-06-24" @default.
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- W2024279272 date "2006-04-04" @default.
- W2024279272 modified "2023-09-26" @default.
- W2024279272 title "Friction Factors for Two-Phase Fluids for Eccentric Annuli in CT Applications" @default.
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- W2024279272 doi "https://doi.org/10.2118/100145-ms" @default.
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