Dang, C., Le Trong Hoa, Ngoc Anh, Ta Ngoc Anh, V.T. and Van Cuong 2024. Selection and application of new bit for Oligocene sequence with high density drilling fluid for development wells, Northeast area of the Bach Ho field. Petrovietnam Journal. 3, (Sep. 2024), 66-72. DOI:https://doi.org/10.47800/PVSI.2024.03-07.