FORTRESS Valve: Well Barrier & Isolation | SLB


Premium isolation valve

FORTRESS premium isolation valve
Rated up to 16,000 psi [110 MPa]
Rated to 375 degF [190 degC]
Validated to ISO 28781 and API Spec 19V V1 and Q1

Rely on this barrier even in deepwater or other debris-laden environments

The FORTRESS premium isolation valve is a bidirectional barrier valve that isolates reservoir fluids in the lower completion and enables operators to transition from the lower to the upper completion without intervention. It is designed to withstand severe debris environments and optimize the available actuation energy—predictably, consistently, and reliably.

It works with all isolation requirements and applications: intelligent, multizone, gravel-pack, frac-pack, and stand-alone screen completions; well suspension and temporary abandonment; and remedial workovers.

Open without intervention or use new contingency options

The Trip Saver one-time remote-opening mechanism can be included to provide interventionless one-time opening of the FORTRESS valve using a predetermined number of tubing pressure cycles applied against the closed valve. Before the remote-opening mechanism is actuated, the FORTRESS valve can be opened and closed mechanically multiple times.

In addition to the enhanced mechanical shifting tool, an optional hydraulically actuated contingency shifting tool is now available for FORTRESS valves that have an anchor profile. It can be deployed via slickline, braided line, or CT. Moreover, the ReSOLVE instrumented wireline intervention service features shifting tools that can be used to open and close the FORTRESS valve. The service provides real-time monitoring, dynamic tool control, and verified downhole actuation.

Isolation Valves Triggers
Isolation Valves Triggers
Premium isolation valve

Trust our stringent qualification procedures

Schlumberger isolation valves have set the standard for barrier valve performance and reliability, and the FORTRESS valve is no exception. It has been more stringently tested that any other valve in the industry. Qualified to bubble-tight conditions, it meets or exceeds API 19V/ISO 28781 V1 and Q1 barrier standards.

As the industry leader in isolation valve technology since the first FIV formation isolation valve installation in 1996, we have gone beyond existing standards to understand how and to what extent debris affects valve performance.

We developed 30 different debris mixtures to represent the most common types of downhole debris and varied the mixtures by particle size and fluid density.

Maximize actuation energy by limiting debris friction

The FORTRESS valve design is based on extensive testing to identify the effects of debris on the actuation energy available to operate the valve. On the basis of the testing, we modified numerous valve and shifting tool features to minimize gaps where debris tends to collect and the energy lost to the frictional effects of debris. The result is much more energy available for actuation. As a result, the valve

  • enhances well productivity by preventing formation damage and minimizing fluid loss
  • saves rig time and costs by minimizing interventions
  • increases safety by providing a downhole barrier against pressure reversals.
FORTRESS premium isolation valve Graphic
Just 15% more actuation energy required by a FORTRESS valve during tests in the presence of debris, compared with 123% more for a conventional valve.