Subsea Intervention Riser System | Subsea Services Alliance

Subsea Intervention Riser System

Coiled tubing and wireline access to conventional and horizontal subsea trees in water depths to 10,000 ft

The intervention riser system (IRS) underwater
Max. working pressure: Available in both 10,000-psi [69-MPa] and 15,000-psi [103-MPa] versions
Max. through-bore diameter: 7 3/8-in production, 5 1/8-in wings
Applications: Coiled tubing, electric line, or slickline operations; cementing; well abandonment; tree changeouts

The intervention riser system (IRS) is available for wireline intervention, production logging, coiled tubing operations, well stimulation, and full plug and abandonment operations.

Deploying the IRS enables quick response via one of our well operations vessels, mobile offshore drilling units (MODUs), or vessels of opportunity (VOOs) to meet subsea well intervention requirements as a cost-effective alternative for accessing a high-pressure well.

The intervention riser system (IRS)

The system can be used to address loss of production or other emergency intervention needs using standard tooling and procedures. It optimizes the safety of entering a well with wireline or coiled tubing with well control water depths up to 10,000 ft [3,048 m]. In enabling access to both conventional and horizontal subsea trees at these depths, the IRS combines rapid response with maximum operational flexibility to meet the specific intervention requirements of high-rate producing deepwater subsea assets.

All required through-tubing subsea well operations can be securely serviced with the IRS, with multidisciplinary operations conducted in a single mobilization.

Partial view of the 15,000-psi intervention riser system from Subsea Services Alliance at surface.

Subsea Tree Removal, Repair, and Reinstallation Completed 30% Under Budget, Gulf of Mexico

Proprietary intervention system records 99.4% operating uptime and minimizes deferred production for major oil well.

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