There has been much research worldwide on viscosifiers for water-based drilling fluid but research on viscosifiers for oil-based drilling fluid is still in the exploratory stage so that an effective viscosifier for oil-based drilling fluid is lacking. An environmentally friendly viscosifier, KLD-1, for oil-based drilling fluid was developed by reverse emulsion polymerization based on the reaction of non-ionic, anionic, and water-soluble monomers in oil solution. KLD-1 viscosifier was effective at increasing the viscosity and shear stress, resisting temperature, and reducing the biological toxicity and preparation cost (by ~12%). It was used successfully in the Fuxin 2 coal field gas well.
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 5, pp. 73 – 76, September – October, 2015.
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Wang, L. Preparation and Application of Viscosifier for Environmentally Friendly Oil-Based Drilling Fluid. Chem Technol Fuels Oils 51, 539–544 (2015). https://doi.org/10.1007/s10553-015-0637-2
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DOI: https://doi.org/10.1007/s10553-015-0637-2