Salam, M., Al-Zubaidi, N., & Al-Wasiti, A. (2019). Lubricating Properties of Water-Based Drilling Fluid Improvement Using Lignite NPs as well as Their Effect on Rheological and Filtration Properties. Association of Arab Universities Journal of Engineering Sciences, 26(1), 81-88. https://doi.org/10.33261/jaaru.2019.26.1.011