HLCQ series centrifugal vacuum degasser is used for removing the small gas bubbles of less than 0.8 mm diameter from gas cut drilling fluid. It utilizes the coordinated action of the horizontal centrifugal force field and the negative pressure to realize degassing, has a handling ability of 5 l/s and an efficiency of 95% ~ 99%, and is characterized by convenient installation, operation and maintenance and long-period service without trouble.