Vacuum degasser is a special equipment to deal with gas drilling fluid, which is applied to the mating of the other drilling equipment to eliminate the harmful gas of the fluid, to recover the specific gravity and stabilize the viscosity of the fluid. The vacuum degasser is an important part of drilling mud cleaning system.

Vacuum Degasser are used to remove the small entrained gas bubbles left in the mud by the mud/gas separator. These units are positioned downstream from mud/gas separators, shale shakers and mud cleaners, while hydrocyclones and centrifuges follow in the arrangement.