Method and apparatus for reducing operating and maintenance costs and emissions in a chemical and/or fluid injection system

摘要

An apparatus for reducing operating costs, maintenance costs and emissions in a fluid injection system, which includes a valve assembly adapted to be connected to a fluid injection point located on a well. The valve assembly has an electronic controller, a flow passage, a plurality of solenoid valves positioned in the flow passage, and a metering chamber positioned in the flow passage that is adapted to receive and discharge fluid flowing through the flow passage into the injection point. The electronic controller supplies signals to selectively open and close each of the plurality of solenoid valves to control the flow of the fluid along the flow passage into the metering chamber and to control the discharge of the fluid from the metering chamber along the flow passage into the injection point.