10 Questions
What does the presence of a yield stress in a fluid mean?
Flow can begin only after a critical shear stress is exceeded.
Which rheological model describes a fluid that requires a minimum pressure to initiate flow and is shear thinning?
Bingham Plastic Model
What kind of behavior is exhibited by most oil field fluids after flow initiation?
Shear rate dependence
In the oil field, which model describes the flow behavior of clay-based drilling muds and few cement slurries?
Bingham Plastic Model
What does PV represent in the context of drilling fluids?
Plastic viscosity
What is the effect of high PV (plastic viscosity) on pump pressure requirements?
Increases pump pressure requirements
In Herschel-Bulkley fluids, what follows the yield stress in terms of shear-rate/shear-stress relationship?
Power-law behavior
What does a yield stress signify in Herschel-Bulkley fluids?
Flow can commence only after exceeding the yield stress.
How does high YP (yield point) affect hole cleaning during cementing?
Improves hole cleaning efficiency
What is an approximation for the effective viscosity at very high shear rates?
PV (Plastic Viscosity)
Learn about Bingham plastic fluids and their distinguishing characteristics, defined by parameters such as plastic viscosity and yield stress. Explore the behavior of Bingham fluids described by specific equations.
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