Rheological Behavior of Drilling Fluids Containing Hydrophobically Modified Starch for Filtrate Reduction

Abstract

Abstract.1 In this work, stress-strain graphs of inverse emulsion fluids containing hydrophobically modified starch were plotted from measurements obtained with a coaxial rotating cylinder viscometer, and rheological models were applied. The Bingham model best fitted the experimental results. The correlations obtained by this model allowed calculating plastic viscosity values outside the shear rate sensitivity range of the viscometer and enabled better determination of the conditions for the fluid use.

A Review in Polymers for Fluid Loss Control in Drilling Operations

“…[61] The results showed that the obtained hydrophobic carboxymethyl starch possessed good solubility, salt resistance, and temperature resistance, which can be used as an effective multifunctional additive for water-based drilling fluids. Dias et al [64,70] incorporated lauryl and estearyl units onto the chain of cornstarch by transesterification reaction with vinyl laurate (C-12) or vinyl stearate (C-18) in the presence of a basic catalyst. And then they evaluated the potential of applying those fatty acids-modified starch derivatives as additives to control the filtrate loss in drilling fluids.…”

“…Dias et al. [ 64,70 ] incorporated lauryl and estearyl units onto the chain of cornstarch by transesterification reaction with vinyl laurate (C‐12) or vinyl stearate (C‐18) in the presence of a basic catalyst. And then they evaluated the potential of applying those fatty acids‐modified starch derivatives as additives to control the filtrate loss in drilling fluids.…”