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

: pp. 86-92
Universidade Federal do Rio de Janeiro (UFRJ), Instituto de Macromoléculas (IMA), Laboratório de Macromoléculas e Colóides na Indústria do Petróleo (LMCP)
Universidade Federal do Rio de Janeiro (UFRJ), Instituto de Macromoléculas (IMA), Laboratório de Macromoléculas e Colóides na Indústria do Petróleo (LMCP)
1 Universidade Federal do Rio de Janeiro (UFRJ), Instituto de Macromoléculas (IMA), Laboratório de Macromoléculas e Colóides na Indústria do Petróleo (LMCP), 2 Universidade Federal do Rio de Janeiro (UFRJ), COPPE/PEMM/LADPOL

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.

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