SAMI (Safety Automated Monitoring Instrument)
The SAMI system by Safoco has been designed as a self-contained autonomous emergency shutdown system for wellhead wing and master valves equipped with pneumatic or hydraulic actuators. The SAMI uses a low power microprocessor to monitor a variety of pressures, temperatures, levels and other signals to control the master and wing valve actuation to close on alarm or via command from the communication system.
Provided there are no alarm conditions, the SAMI can close and open an emergency shut-down valve, verifying the integrity of the ESD system. The SAMI is SCADA ready for communication to either an existing data infrastructure or to Safoco’s data warehouse - ESD ValveScape. Communication is achieved through Iridium Satellite systems in extremely remote areas, Cellular communication systems, or existing RTU systems where available.
The SAMI controller is flexible in its input and output structure to accommodate a variety of wellhead and pipeline sensors. This includes multiple pressures, temperature, fluid levels, electronic sand probes, H2S, fire alarms, valve position sensors, and a number of internal functional and diagnostic inputs - such as battery monitoring, hydraulic level sensors, and hydraulic or pneumatic pressure sensors, depending on the type of valve actuator.
The SAMI control system is typically supplied with a solar charging system, sized to suit the system parameters and the environmental conditions of the installation. Safoco uses specific duty solar batteries, having a typical battery life of 3–5 years.