Applications

• Fluid loss control
• Temporary well barrier
• Downhole lubricator valve
• Packer setting device

Benefits

• Provides reliable well isolation
• Enhances flexibility in well operations because it can be remotely opened and closed multiple times via dual hydraulic control lines
• Saves rig time and cost for subsea wells by enabling rig off hire before tree installation because the valve provides a qualified barrier for temporary well suspension and subsequently allows interventionless opening

Features

• Remote-controlled hydraulic actuation that enables opening and closing the valve as often as required
• Fail-as-is design to prevent accidental closing and opening
• Gas-tight, bidirectional type-CC sealing across ball
• Contingency mechanical shifting
  
• Validated to API Spec 19V V1 and ISO 28781 V1

How it improves performance

The SFIV-II™ surface-controlled bidirectional isolation valve protects formations from damage during completion and workover operations while isolating fluids by acting as a barrier between the reservoir and surface. It is actuated from surface through hydraulic control lines and can be opened and closed remotely as required. The valve is insensitive to setting depth and features a fail-as-is design to prevent accidental actuation.

In subsea applications, the SFIV-II valve is commonly deployed as a downhole lubricator valve, integrated into the production string to provide a qualified barrier for vertical tree installation. Consequently, the rig can leave before the tree is installed, reducing costs. The valve can later be reopened from surface without intervention, removing the need for a traditional lubricator valve.

How it works

The valve is operated via dedicated control lines connected to dual hydraulic ports—one each for opening and closing. Applying pressure to a control line cycles the internal mechanism, enabling valve actuation from surface.

The design ensures bidirectional sealing to withstand downhole pressure. The valve can also be operated mechanically via a shifting profile, using wireline or coiled tubing.