eRED®-LV – Remotely Operated Isolation Barrier Valve
The eRED®-LV valve is a computer-controlled, isolation barrier valve that can be repeatedly opened or closed by remote command. It is permanently deployed as part of the tubing where it is used as a full-bore, testable barrier during completion deployment operations.
It is actuated without the need for any surface control lines (saving tubing hanger penetrations) or interventions. Each time it is operated, an intervention is eliminated from the operation, dramatically reducing rig-time, costs and associated risks.
HOW THE eRED®-LV VALVE WORKS
To gain the greatest benefit and flexibility, two eRED®-LV valves are used.
The first is positioned in the lowest part of the completion below the production packer. It is deployed in the open position allowing the completion to self-fill and for well fluids to be circulated. It can be instructed to close at any time using one of the triggers. When closed, the tubing can be pressure tested and the production packer hydraulically set against it.
The second eRED®-LV valve is positioned just below the tubing hanger. This too is deployed in the open position and can be closed using any of the triggers, although the pressure window trigger provides the greatest flexibility. Once the upper eRED®-LV valve is closed, it provides a second testable barrier so the BOP can be removed and the wellhead installed and safely tested.
Both eRED®-LV valves can subsequently be remotely reopened, even without the rig on location. They are permanently left downhole in the open position, with the full-bore providing the maximum flow rates for production or injection.
Controlling the eRED®-LV Valve Remotely
By applying a defined pressure for a defined time at surface, the operator can activate the pressure window trigger. This allows direct communication to the eRED®-LV valve so it can be remotely operated.
Any pressure applied outside the defined values will be ignored by the eRED®-LV valve. This means that pressure can be applied to the tubing without any risk of inadvertent activation.
Onboard data analysis allows the eRED®-LV valve to distinguish its own commands from other external factors such as naturally fluctuating hydrostatic or reservoir pressure. This enables the valve to behave as planned, even if the downhole conditions change unexpectedly.
eRED®-LV Valve Autonomous Operation
A range of other triggers consisting of ambient well pressure, ambient well temperature and a timer are also available. Each trigger can be used independently or combined to build more elaborate instructions. In addition, the pressure window trigger can be used to manually cancel or override any trigger or permanently lock the eRED®-LV valve in its current position.
FEATURES
»Remotely operated time-after-time
»Long battery life
»Run open or closed
»Full-bore
»Bi-directional sealing mechanism
BENEFITS
»Eliminates multiple wireline runs during completion placement operations – saving time, money and helping reduce risk
»Operational for at least 10 months – for use in temporary abandonment operations or as a flow control device
»Provides flexible deployment options and well control
»Provides maximum production or injection flow rates
»Provides a fully testable downhole barrier
APPLICATION
The eRED®-LV valve is particularly suited for use during completion deployment. Using the eRED®-LV valves instead of conventional barriers allows the entire operation to be carried out without any form of intervention – providing substantial cost savings and helping to reduce risk.
The eRED®-HS valve is a computer-controlled, gas-tight circulating valve that can be repeatedly opened or closed by remote command. No surface connections or interventions are required to communicate with or operate the valve.
Permanently deployed above the production packer as part of the tubing string, the eRED®-HS valve controls the flow of well fluids between the tubing and annulus without the need for any interventions or surface control lines – saving rig-time, costs and helping to reduce risk.
HOW IT WORKS
Normally, the eRED®-HS valve is run-in-hole in the closed position and subsequently opened by remote command after the packer has been set. The valve is commanded to open by applying pressure at surface against a deep-set barrier such as a reservoir isolation barrier.
When open, well fluids can be circulated to under-balance the well ready for production; the large flow ports allowing faster pump rates to be used, saving on rig-time.
With the circulation successfully completed, the eRED®-HS valve is commanded to re-close and/or permanently lock using another pressure window trigger. Each time the valve is operated this way, an intervention is eliminated from the operation, saving rig-time, costs and helping to reduce risk.
Controlling the eRED®-HS Valve Remotely
By applying a defined pressure for a defined time at surface, the operator can activate the pressure window trigger. This allows direct communication to the eRED®-HS valve so it can be remotely operated.
Any pressure applied outside the defined values will be ignored. This means that pressure can be applied to the tubing without any risk of inadvertent activation.
Onboard data analysis allows the eRED®-HS valve to distinguish its own commands from other external factors such as naturally fluctuating hydrostatic or reservoir pressure. This enables the valve to behave as planned, even if the downhole conditions change unexpectedly.
eRED®-HS Valve Autonomous Operation
A range of other triggers consisting of ambient well pressure, ambient well temperature and a timer are also available. These triggers are used to provide a preprogrammed sequence for the eRED®-HS valve to follow without any input from the surface.
Each trigger can be used independently or combined to build more elaborate instructions. The pressure window trigger can also be used to manually cancel or override any trigger or permanently lock the valve in its current position
FEATURES
»Remotely operated time-after-time
»Large tubing to annulus ports
»Run open or closed
»No dedicated personnel required
»Metal-to-metal carbide seal
BENEFITS
»Eliminates multiple interventions during completion operations – saving time, money and helping reduce risk
»Allows for faster pump rates, providing safer and more efficient circulation of well fluids
»Provides flexible deployment options and well control while running-in-hole
»Reduces the number of operations personnel – saving costs and helping reduce risk
»V0 rated seal is capable of withstanding high circulation rates
APPLICATION
The eRED®-HS valve has been designed specifically to offer a safe and highly efficient method of circulating well fluids during a well completion operation. It is deployed as an integrated part of the tubing string, positioned above the main production packer. This configuration eliminates the need to circulate across the unset packer, reducing the risk of damaging the elements and preventing the circulation pressure from impacting on the reservoir.
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