EXPERIMENTAL STUDY OF HOLE CLEANING PERFORMANCE OF UNDERBALANCED DRILLING AT DOWNHOLE CONDITIONS. Nigerian Journal of Technology, [S. l.], v. 35, n. 2, p. 375–380, 2016. DOI: 10.4314/njt.352.1097. Disponível em: https://nijotech.com/index.php/nijotech/article/view/1097. Acesso em: 5 may. 2026.