Overview

Automation & Electronics' WAG (Water Alternating Gas) Injection Controller 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 WAG350 controller is designed around the Automation & Electronics field proven WAG firmware and the Control Micro Systems SCADAPack® 350 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.

Automation Electronics WAG350 Water Alternating Gas Injection Controller

The standard unit includes the SCADAPack 350 controller and the Automation Electronics SCADAPack WAG I/O Module (SWIM). The SWIM incorporates the valve actuator pulse and direction control relays, and 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, PDA 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.

Rugged Field PC with Bluetooth

Standard Features

Flow control with pressure override
Pressure fall-off test software
Step rate and step pressure test software
Direct turbine meter input
Wedge type meter flow measurement for CO₂ and H₂O
Manual valve override
Local / remote switch
NIST14 density calculation
LEDs for easy status indication
Wireless Bluetooth interface

Options

Maple Systems OIT3175 local operator interface
RTU Link for rugged field PC
12 V_DC @ 10 A battery backed supply
14 A-H/day solar supply
Wireline to wireless ethernet communications
Event log

Software

The WAG350 application program is divided into the following modules:

Elapsed time counter
LCD and key pad user interface
Time of day
Gauge off time
Field input scaling and alarm handler
ESD control
Pressure fall off test
Control valve
Control valve override
Shut in and runtime totalizer
End element buffer
Override control modes
Watchdog timer with recovery
Long term trending