Product Sheet MFIV-II Mechanically Controlled Isolation Valve
Isolates reservoir fluids in the lower completion, protecting formations from fluid loss and damaging fluids.
Mechanically controlled isolation valve
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.
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.