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.
Isolate reservoir fluids within the lower completion using the FIV-II formation isolation valve. A bidirectional barrier, the valve enables operators to transition seamlessly—without intervention—from the lower to the upper completion.
The valve features the Trip Saver one-time remote-opening mechanism, which eliminates the need for an intervention to open the valve one time. Instead, cycles of tubing pressure are applied against the closed valve in a number predetermined by an integral indexing mechanism.
The valve has a wide range of applications, including fluid loss control, underbalanced perforating, well control barrier operations, and multizone isolation. Because of the rotating ball and floating seal design, the valve is more debris tolerant compared with previous designs, making it especially useful in sandface completions.
The FIV-II valve is qualified and tested with gas to a zero-bubble leak rate across the ball sealing mechanism from below under specified conditions. This stringent acceptance criterion enables the valve to be used as a barrier for well intervention operations and for well suspension before the Trip Saver mechanism is activated.
Challenges of tight fracture-to-pore pressure window in unconsolidated reservoir overcome by meticulous collaboration, completion design, planning, and execution.
Effective well control with unsurpassed reliability and interventionless actuation.
Integrated approach optimizes operations and prevents premature screenouts in long horizontal sections with reactive shale and depleted zones, offshore Malaysia.
Isolates reservoir fluids in the lower completion, protecting formations from fluid loss and damaging fluids.
Sixteen wells opened remotely with 100% success following suspension times of up to 1,600 days, enabling full access to the wellbore with zero NPT.