The Automation and Electronics, Inc. Water Alternate Gas Injection Controller (LP_WAG) is designed to monitor and control the injection of water or carbon dioxide at the wellhead.

User configurable pressure fall-off, step rate and step pressure test programs are provided. The LP_WAG controller is designed around our field proved WAG firmware and the Control Micro Systems SCADAPack® LP controller. The unit utilizes the NIST14 density equations to provide more accurate real time flow measurement in connection with a turbine meter or wedge type meter. Control modes available to the user are rate and/ or pressure limited with associated high and low set points. New features include selectable override control actions which allow the preservation of line pack and tubing pressure during low supply pressure situations or supply line ruptures.

The standard unit includes the SCADAPack LP controller and the Automation Electronics SCADAPack WAG I/O Module (SWIM). The SWIM incorporates the valve actuator pulse and direction control relays and the local actuator control switches. Labeled field terminals for all analog input transmitters and field status inputs are provided making installation quick and simple. All inputs are fuse protected.

Control parameters are configurable by the operator using an optional local interface, personal digital assistant or portable computer. A wireless Bluetooth interface is standard. The unit is supplied with typical parameters ready for specific application tuning. Setup parameters may also be downloaded from the host computer. A local / remote switch allows easy hardware access to the valve movement using toggle switches.