دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a device installed on a gaslift mandrel, which in turn is put on the tubing string of a gas-lift well. Tubing and casing pressures cause the valve to open and close, thus allowing gas to be injected into the fluid in the tubing to cause the fluid to rise to the surface.