MFIV-II Isolation Valve | Mechanical Barrier Valve | Schlumberger
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MFIV-II

Mechanically controlled isolation valve

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Rated to 11,000 psi [76 MPa]
Rated to 335 degF [168 degC]
Validated to ISO 28781 and API Spec 19V V3 and Q1

Prevent formation damage with a versatile, bidirectional barrier valve

The MFIV-II mechanically controlled isolation valve serves as a bidirectional barrier to isolate reservoir fluids in the lower completion.

  • Enhance well productivity by preventing formation damage and minimizing fluid loss
  • Save rig time and costs by eliminating the need to kill the well for various operations
  • Increase safety by providing a downhole barrier against pressure reversals
MFIV-II mechanically controlled isolation valve

Open and close multiple times

The valve also provides a two-way barrier during remedial work (e.g., removal and reinstallation of an ESP or the production tubing), underbalanced perforating, and general completion operations.

Operated mechanically with a shifting tool run on the end of washpipe, a perforating string, or CT, the MFIV-II valve can be opened and closed multiple times. It uses the same ball sealing design and latch collet system used in the FIV-II formation isolation valve.

Rely on stringent qualification and testing

The MFIV-II valve is qualified with gas to a zero-bubble leak rate across the ball from below under specified conditions. This stringent acceptance criterion enables the tool to be used as a barrier before production starts; subsequently the valve can be used as a fluid loss control device for well intervention operations, well suspension, and temporary abandonment.

MFIV-II mechanically controlled isolation valve

Isolation Valve Cleanup Subs

Remove debris above ball-type isolation valves

Clean up isolation valves with jetting or circulation subs to reduce the risk that debris will hinder valve operation.
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Brochure Isolation Valves

Effective well control with unsurpassed reliability and interventionless actuation.

Product Sheet MFIV-II Mechanically Controlled Isolation Valve

Isolates reservoir fluids in the lower completion, protecting formations from fluid loss and damaging fluids.

Brochure Screens and Inflow Control Devices

Broadest, most versatile portfolio in the industry.

Case Study Operator Increases Oil Production, Decreases Time, and Cuts Costs by USD 422,000 Offshore Indonesia

Challenges of tight fracture-to-pore pressure window in unconsolidated reservoir overcome by meticulous collaboration, completion design, planning, and execution.

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