Paper: PRINCIPLES AND APPLICATIONS OF GAS LIFT

This paper deals with the general principles and applications of gas lift. Various types of gas lift operations are discussed. The mechanical operations of flow valves are explained. Types of installations are analyzed. A detail design technique for the most efficient point of gas injection is outlined. Valve spacing calculations are presented. Flow valve operating pressure design is commented upon. Operational hints to increase efficiency are suggested, the closed rotative gas lift system and the future trend in retrievable gas lift equipment are mentioned. The advantages of gas lift are emphasized.