Schlumberger

SFIV-II Surface-Controlled Bidirectional Isolation Valve

Overview Library

Single or dual control line options

The SFIV-II surface-controlled bidirectional isolation valve is actuated through dual hydraulic control lines from the surface. When required (e.g., when the tubing hanger can only accommodate a limited number of penetrations), it can be controlled by a single control line using an optional feature called the single-line switch.

Reduced formation damage and workover costs

The valve provides a reliable barrier within the completion string and contains fluids during completion and workover operations. By isolating the formation, it prevents formation damage, simplifies completion operations, and increases wellbore safety. The valve

  • prevents fluid loss
  • improves well productivity by providing a fulbore ID
  • enables multiple perforating runs without killing the well
  • minimizes interventions with remote opening and closing of the valve
  • reduces rig time by eliminating the need to run a plug
  • improves safety when perforating.

Postproduction certified reliability

The SFIV-II valve can be used before and during production or injection. It can be remotely opened and closed multiple times using the control lines and maintains its pressure integrity over its predetermined life cycle. Its true fail-as-is (FAI) feature prevents accidental closing or opening in case of a hydraulic system failure. The valve is designed and tested in accordance with API 19V/ISO 28781 V1 and Q1 Type CC standards.

Insensitive to depth

Replacement of the interference collet with a displacement-type design has resulted in a valve that is insensitive to setting depth. Consequently, it can be run as deep and close to the formation as required, minimizing storage effects when the well is shut in for production buildup tests.

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FIV-II formation isolation valve
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