We must concentrate our paper selection on technology and operating methods that make HP/HT drilling operations faster, safer, and more cost-efficient. If above-threshold drilling costs shelve a project, the project will not fly. And without projects, HP/HT know-how and equipment quickly disappears. This paper discusses the successful application of managed-pressure drilling (MPD) in the basin with reduction in risks and well costs. This paper discusses how managed-pressure-drilling (MPD) technology led to cost savings in two wells drilled in the Hai Thach gas field offshore southern Vietnam.