Abstract
This paper presents the effect of different natural gums on water-bentonite slurry, which is used as based fluid in water based drilling fluid. The gums used are Babul gum (Acacia nilotica), Dhawda gum (Anogeissus latifolia), Katira gum (Cochlospermum religiosum) and Semal gum (Bombax ceiba). For present investigation, samples have been prepared by varying concentration of gums. The variation of shear stress and shear rate has been plotted and on the basis of this behaviour of fluids has been explained. The value of k and n are calculated by using Power law. R2 values are also calculated to support the choice of gum selection.
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