دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a method of artificial lift that utilizes a plunger that travels up and down inside the tubing. Internally, the plunger contains a bypass valve that is opened when it hits the top of the tubing and closed when it hits the bottom. The plungers fit with the tubing reduces liquid slippage back through the well fluid and the gas that is propelling it. Plunger lift is used in less than 1 percent of all artificially produced wells. It is particularly applicable, however, in high gas-liquid ratio oilwells or in gas wells with low bonom- hole pressure and low productivity.