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...ttention to the flow properties. The viscosity can be adjusted upward with polymers or clay material or adjusted downward with chemical thinners or water. The majority of the fluid loss control and viscosity is maintained via polymers, and these products are very susceptible to contamination from the formatio

...le to water vapor (Table 3),<ref name=Bajsarowicz /> as are several common polymers (Table 4).<ref name=Hunt_etal_1988 /> |+ Table 4. Permeation rates for various polymers.<ref name=Hunt_etal_1988 />

...with solutions of guar gum and build structure by “cross-linking” the guar polymers. These fluids, when properly designed and formulated, permit the suspension