His Majesty the Sultan and Yang Di-Pertuan Negara Brunei Darussalam in his titah during the UBD 25th Anniversary Celebration in 2011 announced the introduction of The Chancellor's Scholar UBD.
2011年，苏丹陛下和文莱达鲁萨兰国的 Yang Di-Pertuan Negara 在 UBD 25周年庆典上宣布了学者 UBD 的引言。
Gas drilling fluid is often used in UBD in low pressure formation.
在低压储层进行欠平衡钻井时常选用气体型低密度流体。
The difference of well control between UBD and conventional drilling;
欠平衡钻井井控与常规钻井井控差异及施工原则；
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