Hoang Thanh Tung, Nguyen Pham Huy Cuong, Tran Hong Nam, Le Quang Duyen and Dao Thi Uyen 2019. Selection of optimised PDC bits in the 8½” hole section of HTHP wells at Hai Thach field, Nam Con Son basin. Petrovietnam Journal. 2, (Feb. 2019), 25-34. DOI:https://doi.org/10.25073/petrovietnam journal.v2i0.238.