Controlled flow solutions - subsea containment toolkit for complex well incidents

Containment is a source-control response option used to create a controlled flow system from a subsea well to the surface following a well control incident. It may be considered where capping alone is not appropriate or where a cap-and-flow strategy has been selected.

The containment toolkit supports cap-and-flow response strategies by enabling hydrocarbons to flow from the wellhead through subsea flowlines and processing equipment for safe capture, processing and transfer.

Designed to support a range of Mobile Offshore Drilling Units (MODUs) as capture vessels, the containment toolkit is compatible with industry-standard well testing equipment and can be integrated into a wider source-control response strategy. The containment toolkit is strategically stored in the UK, Brazil, Singapore, Norway and the USA to support global response readiness.

Technical Information Sheet

SWIS Containment Toolkit

Global deployment capability

Strategically stored in key international hubs, allowing swift mobilisation anywhere in the world.

Industry-standard compatibility

Interfaces with widely available well test equipment and a variety of MODUs to simplify operational readiness.

Designed for complex subsea scenarios

Supports operations up to 3,000m depth with high tolerance to temperature, H₂S, and CO₂ content.

Interactive 3D equipment models

Select the equipment below to find out more and explore the interactive 3D models of its set-up.

Subsea Well Containment Toolkit

The Subsea Well Containment method safely diverts flow when a well cap can't shut in, using specialised equipment to create a temporary subsea production system.

Key facts

Supports cap-and-flow response strategies.
Compatible with industry-standard well testing equipment.
Designed to support a range of Mobile Offshore Drilling Units (MODUs).
Strategically stored in the UK, Brazil, Singapore, Norway and the USA.
Components are transportable by air, sea and road.
Designed for water depths up to 3,000m.

Build Subsea Source Control Capability

Our on-demand Source Control training courses provide a structured pathway to build understanding of subsea response operations and equipment. The Introduction to Fundamentals course covers core principles, system components, and deployment considerations across a range of scenarios. Building on this foundation, the Intermediate Mission-Specific course focuses on the practical application of source control strategies in real-world contexts, supporting more informed decision-making during an incident.

START WITH FUNDAMENTALS

Containment FAQs

: It enables the controlled capture and redirection of hydrocarbons from a subsea well to a MODU when the well cannot be shut in by a capping stack alone.
: Flexible flowlines and jumpers are stored in the UK, Brazil, and Singapore. All other components are stored in the UK, Norway, and the USA, ready for air or sea freight.
: The system is designed to integrate with a wide range of Mobile Offshore Drilling Units (MODUs) and standard well testing equipment.
: Hydrate inhibitors can be injected into the system using a coiled tubing spread, ensuring continuous and stable flow in deepwater environments.
: Access to the containment toolkit is available through OSRL’s subsea capping (and OIE) and containment service, offered as part of our enhanced membership coverage.

With decades of subsea spill response experience, we offer the technical assurance and logistical reliability needed in the most demanding environments.

Our Containment Toolkit, developed in collaboration with industry partners, reflects our commitment to operational excellence and environmental protection.

We’ve proven its readiness through extensive integration testing and deployment exercises in multiple regions. As a member-driven organisation, our solutions are aligned with real-world challenges. Our regional storage model ensures that wherever a subsea incident occurs, the right equipment can be deployed quickly - minimising downtime and maximising control. With OSRL, you're not just getting equipment - you’re gaining a trusted partner in crisis.

Get In Touch For More Information About Containment

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Regional numbers:

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Containment