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Questions and Answers
What does the presence of a yield stress in a fluid mean?
What does the presence of a yield stress in a fluid mean?
- Flow can begin only after a critical shear stress is exceeded. (correct)
- The fluid will always exhibit Newtonian flow.
- The fluid behaves like a power-law fluid.
- The fluid will have a linear shear stress versus shear rate relationship.
Which rheological model describes a fluid that requires a minimum pressure to initiate flow and is shear thinning?
Which rheological model describes a fluid that requires a minimum pressure to initiate flow and is shear thinning?
- Newtonian Fluid Model
- Bingham Plastic Model (correct)
- Power-law Model
- Herschel-Bulkley Model
What kind of behavior is exhibited by most oil field fluids after flow initiation?
What kind of behavior is exhibited by most oil field fluids after flow initiation?
- Shear rate dependence (correct)
- Power-law behavior
- Bingham Plastic behavior
- Newtonian behavior
In the oil field, which model describes the flow behavior of clay-based drilling muds and few cement slurries?
In the oil field, which model describes the flow behavior of clay-based drilling muds and few cement slurries?
What does PV represent in the context of drilling fluids?
What does PV represent in the context of drilling fluids?
What is the effect of high PV (plastic viscosity) on pump pressure requirements?
What is the effect of high PV (plastic viscosity) on pump pressure requirements?
In Herschel-Bulkley fluids, what follows the yield stress in terms of shear-rate/shear-stress relationship?
In Herschel-Bulkley fluids, what follows the yield stress in terms of shear-rate/shear-stress relationship?
What does a yield stress signify in Herschel-Bulkley fluids?
What does a yield stress signify in Herschel-Bulkley fluids?
How does high YP (yield point) affect hole cleaning during cementing?
How does high YP (yield point) affect hole cleaning during cementing?
What is an approximation for the effective viscosity at very high shear rates?
What is an approximation for the effective viscosity at very high shear rates?
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