Cua, D., Van Tu, N., Viet Duc, B., Ngoc Khue, H., Hong Linh, H., Van Hung, V. and Van Thom, B. 2017. Orientations for research and development of chemicals to be domestically produced and used in drilling mud systems in Vietnam. Petrovietnam Journal. 3, (Mar. 2017), 24 - 27. DOI:https://doi.org/10.25073/petrovietnam journal.v3i0.131.