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Research Article

Lignin Graft Copolymer as Mud Thinner for Deep Well Drilling Operation

M.N. Mohamad Ibrahim , M.N. Noorhaida , M.Y. Nor Nadiah , M.G. Azilawati and S. Shuib
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Lignin extracted from black liquor of oil palm Empty Fruit Bunch (EFB) was refluxed with acrylic acid at 30°C in the presence of nitrogen atmosphere to form lignin acrylic acid (lignin AA). Methanol was used as a reaction medium in this experiment. At the end of the copolymerization process, a small amount of hydroquinone 1% was added to inhibit polymerization process. The formation of graft copolymer was proven by the attachment of acrylic acid side chain to the lignin, which was demonstrated by Differential Scanning Calorimetry (DSC) and infrared (IR) spectroscopy analyses. Rheological performances of lignin AA as a drilling mud thinner were compared with a commercial thinner (lignosulfonate). Results found that the newly formulated thinner (lignin AA) shows better thinning performance at high temperature (190°C) with the optimum dosage of 0.3% of total mud volume for water based mud system compared to lignosulfonate. Furthermore, the lignin AA also shows better performance as a fluid loss reducer agent against a commercial fluid loss reducer agent, Ressinex II towards salt contamination.

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  How to cite this article:

M.N. Mohamad Ibrahim , M.N. Noorhaida , M.Y. Nor Nadiah , M.G. Azilawati and S. Shuib , 2006. Lignin Graft Copolymer as Mud Thinner for Deep Well Drilling Operation. Journal of Applied Sciences, 6: 2593-2598.

DOI: 10.3923/jas.2006.2593.2598


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