Flow of drilling fluids in eccentric annuli

Dennis A. Siginer, Sayavur I. Bakhtiyarov

Research output: Contribution to journalArticle

20 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)119-132
Number of pages14
JournalJournal of Non-Newtonian Fluid Mechanics
Issue number2-3
Publication statusPublished - Aug 1 1998

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Applied Mathematics

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