Flow of drilling fluids in eccentric annuli

Journal article

Authors / Editors

Siginer, Dennis

Research Areas

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Publication Details

Author list: Siginer DA, Bakhtiyarov SI

Publisher: Elsevier

Place: AMSTERDAM

Publication year: 1998

Journal: Journal of Non-Newtonian Fluid Mechanics (0377-0257)

Journal acronym: J NON-NEWTON FLUID

Volume number: 78

Issue number: 2-3

Start page: 119

End page: 132

Number of pages: 14

ISSN: 0377-0257

eISSN: 1873-2631

Languages: English-Great Britain (EN-GB)

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Abstract

The effect of pipe eccentricity on the flow of well bore fluids in annuli is investigated both analytically and experimentally. The expression for azimuthal velocity as a function of the eccentricity ratio and rheological parameters of the fluid was obtained analytically using a linear fluidity model. Velocity profiles were measured for a Newtonian glycerol/water mixture and a non-Newtonian oil field spacer fluid in eccentric annuli using the stroboscopic flow visualization method. Measured velocity profiles in the eccentric annulus compare well to analytical predictions. (C) 1998 Elsevier Science B.V. All rights reserved.

Keywords

azimuthal velocity, drilling fluids, eccentric annuli

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