System and choke valve actuator mechanism for operating a plunger lift well

摘要

An operating system and choke valve actuator mechanism for a plunger lift gas and oil well having a casing and a tubing string. The actuator mechanism has a manual "low stage" setting for the choke valve so that low velocity gas will flow from the tubing string. The system has a control unit responsive to a pressure differential between casing gas (high) and tubing string gas (low) to move the actuator mechanism to a "high stage" setting for the choke valve so that high velocity gas and oil will flow for the tubing string.