Pseudoplastic
Pseudoplastic :
(adj.) Drilling Fluids. A descriptive term for a fluid with shear-thinning characteristics that does not exhibit thixotropy. Most effective drilling fluids are shear thinning, although most also exhibit some gel-building characteristics. Pseudoplastic rheology, low viscosity at high shear rates and high viscosity at low shear rates, benefits several aspects of drilling-higher drilling rate and improved cuttingslifting. Bingham plastic fluids, power-law fluids and Herschel-Bulkley fluids fall in the psuedoplastic category of rheology. See: Bingham plastic model, Herschel-Bulkley fluid, hydroxyethylcellulose, non-Newtonian fluid, plastic fluid, power-law fluid, shear rate, shear stress, thixotropy, viscosity, XC polymer
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