Flow of drilling fluids in eccentric annuli

Dennis A. Siginer, Sayavur I. Bakhtiyarov

Research output: Contribution to journalArticlepeer-review

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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