Rheological Properties of Drilling Fluids - Use of Dimensionless Shear Rates in Herschel-Bulkley Models and Power-Law Models
作者: Arild SaasenJan David Ytrehus
刊名: Applied Rheology, 2018, Vol.28 (5)
来源数据库: Applied Rheology
DOI: 10.3933/ApplRheol-28-54515
关键词: Rheology
原始语种摘要: An approach of Nelson and Ewoldt [Soft Matter 13 (2017) 7578] to create a viscosity model of the Herschel-Bulkley type in order to use only parameters with the potential of containing fluid information has been extended to be applied to drilling fluids using current industry standard procedures. The commonly used Herschel-Bulkley consistency parameter k is found inadequate in describing fluid properties properly as it has a unit dependent on n . Hence, the model is not optimum for digitalisation. The Herschel- Bulkley model is re-written and base its parameters directly on the yield stress and the additional or surplus shear stress at a pre-determined shear rate relevant for the flow situation to be considered. This approach is also applicable for Power-Law models.
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  • parameters 参数
  • inadequate 不够
  • additional 追加的
  • Power 鲍尔铅基轴承合金
  • situation 立场
  • surplus 剩余
  • consistency 一致性
  • fluid 
  • current 
  • potential