The CD-1800 D-GASSER unit removes entrained gases—including H₂S and corrosive oxygen—from drilling fluids in the return flow using a high-speed centrifugal-force system that is more powerful than conventional vacuum or impact systems. The self-contained unit is rig-footprint friendly and eliminates the need for disassembly and reassembly during rig moves. By generating up to 1,800 gpm, the CD-1800 D-GASSER unit provides the lowest horsepower-to-gpm throughput ratio. This high-flow-rate potential helps meet many deepwater offshore rig requirements for high-volume drilling.