The electric surface actuator comes with integrated sensors which track actuator position, monitor housing pressure, and measure current for main actuator components. Valve sensing can also be included to identify gate and stem leaks. These features can be integrated into a smart actuator control system.
Actuator designs are fail-close, using a clutch to disengage the valve from the electrical system and enable a mechanical spring to rapidly close the valve.
The sensors interface with your SCADA systems or distributed control systems (DCS) using industry-standard communication protocols.
Actuator control system
To complement the electric surface actuator, SLB has designed a smart control system equipped with programmable logic control (PLC), servo drive, and handheld wireless tablet with HMI. This intelligent control system manages the electric actuator valve open-close operations and provides condition monitoring of various components of the electrical actuator, valve, and tree. The control system software is configured with partial stroke test capability for the fail-safe actuators and facilitates remote well testing.
The control system can be integrated into any wellhead control panel configuration where it can be operated via a platform safety system using various industry standard communication protocols, such as MODBUS®, OPC UA™, or PROFINET™. While specific open and close routines are handled by the local software within the CPU, sequencing, and decisions of valve operations on the tree are controlled by the platform safety system.
All fail-safe main actuator drive electronics are located away from the valve and tree for ease of installation, maintenance, and troubleshooting. For these safety functions, this separation ensures that sensitive electronics are kept out of the red zone and away from what can be a relative harsh environment.
Modbus is a registered trademark of
Schneider Electric. OPC UA is a mark of OPC Foundation. PROFINET is a mark of PROFIBUS & PROFINET International.