Journal of Polymer and Biopolymer Physics Chemistry
ISSN (Print): 2373-3403 ISSN (Online): 2373-3411 Website: http://www.sciepub.com/journal/jpbpc Editor-in-chief: Martin Alberto Masuelli
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Journal of Polymer and Biopolymer Physics Chemistry. 2014, 2(3), 50-54
DOI: 10.12691/jpbpc-2-3-2
Open AccessArticle

Rheological Behaviour of Eco-friendly Drilling Fluids from Biopolymers

O.U. Nwosu1 and C. M. Ewulonu2,

1Department of Environmental Engineering/Industrial Safety, Imo State Polytechnic, Umuagwo, Nigeria

2Department of Polymer and Textile Engineering, Nnamdi Azikiwe University, Awka, Nigeria

Pub. Date: August 27, 2014

Cite this paper:
O.U. Nwosu and C. M. Ewulonu. Rheological Behaviour of Eco-friendly Drilling Fluids from Biopolymers. Journal of Polymer and Biopolymer Physics Chemistry. 2014; 2(3):50-54. doi: 10.12691/jpbpc-2-3-2

Abstract

The rheological properties of drilling fluids modified with three biopolymers – carboxylmethyl cellulose (CMC), xanthan gum polysaccharide (xanplex D), and polyanionic cellulose (PAC-R) have been studied. The effect of concentration of the biopolymers on the drilling fluid was also reported. The modified drilling fluids were found to obey Herschel-Bulkley rheological model. The fluids were also found to be pseudo-plastic with shear thinning behaviour. Polyanionic cellulose showed the highest shear rate and shear stress than carboxylmethyl cellulose and xanplex D. This can be attributed to the straight open long chain structure of PAC-R and its ability to interact with water, solids and with itself. It also acted as a better viscosifier because of the more negative charge it carries. Also, the formulation of biopolymer drilling fluid with bentonite has proven to improve the viscosity than that encountered in normal conventional drilling fluids.

Keywords:
rheology biopolymers drilling fluids natural polymers Herschel-Bulkley model

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