Purpose Each gas-lift system consists of many components that must be understood@ operated@ and maintained. These components must function together for the system to be efficient and economic in artificially lifting wells. This document discusses the system components and presents a summary of recommended practices for recognizing and dealing with many of the problems that may cause upsets and/or inefficient operations in continuous gas-lift. The checklist below may be used as a quick reference guide for spotting and addressing common problems that affect continuous gas-lift. This document does not address intermittent gas-lift; it is being addressed in API 11V10.