OBETA, Perpetual Oby; SAMUEL, Esther. Rheological Evaluation of Mucuna sloanei (Ukpo) as a Sustainable Bio-Polymer Viscosifier for Water-Based Drilling Fluids in Nigeria. Direct Research Journal of Engineering and Information Technology, [S. l.], v. 14, n. 1, p. 150–159, 2026. DOI: 10.26765/DRJEIT176147853. Disponível em: https://journals.directresearchpublisher.org/index.php/drjeit/article/view/738. Acesso em: 12 jun. 2026.