Completion & Workover Riser Systems, Products & Tools

Intervention and abandonment riser systems for reliable well access

Our intervention and abandonment riser systems are designed to provide safe, reliable well access across the full lifecycle of offshore assets. Deployed from jack-ups, lift boats and floating vessels, they enable intervention, snubbing and abandonment operations while maintaining pressure integrity, structural stability and operational efficiency in both shallow and deepwater environments.

A complete riser-based solution for intervention and abandonment operations

Our intervention and abandonment riser systems provide a fully integrated, riser-based well access solution, supporting operations from the seabed to surface. Designed for demanding offshore conditions, the system combines fatigue-resistant riser joints, subsea connectors and pressure control equipment to enable safe, repeatable operations.

The system supports intervention, snubbing and abandonment scopes across a wide range of well types, including legacy and modern subsea trees. Configurable for jack-up, lift boat and floating vessel deployment, it enables operators to safely access wells while reducing reliance on deepwater intervention vessels and minimising overall campaign cost and complexity.

Designed for intervention and abandonment

Our riser systems support intervention and abandonment operations across shallow and subsea environments.

High-fatigue, high-integrity performance

Engineered to withstand repeated make-up cycles, dynamic loading and long-term offshore deployment.

A range of flexible deployment options

Suitable for jack-ups, lift boats and floating vessels across a wide range of water depths and well types.

Aquaterra Energy's AQC-CW Completion and Workover Riser system working offshore

Proven well access delivery across global intervention campaigns

Our intervention and abandonment riser systems have been deployed on offshore projects worldwide, supporting operators through late-life field operations, well remediation and permanent abandonment. By combining riser hardware, subsea interfaces, pressure control equipment and in-house engineering analysis, we provide a fully integrated well access solution. This approach enables safer execution, reduced offshore risk and improved cost certainty across intervention and abandonment campaigns, while maintaining full compliance with industry standards and regulatory requirements.

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Products

Drilling

Proven, flexible and integrated drilling well access solutions, improving efficiency across subsea developments.

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Intervention & abandonment

Riser-based systems for safe and reliable well re-entry, for intervention and abandonment operations.

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Offshore analysis

Intelligent analysis supporting confident delivery, smarter investment and sustained project success.

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Carbon capture & storage

Expert CO₂ storage solutions, supporting tomorrow’s energy transition.

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Subsea

Integrated subsea systems connecting seabed infrastructure through to surface operations.

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Tensioning

Trusted tension capabilities built for ease, longevity and performance.

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Platforms

Innovative offshore platforms tailored to unique project needs, from concept to installation.

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Offshore equipment & services

Delivering a full suite of specialist products, supported by decades of offshore expertise.

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News & blogs

Why UK Mature-Basin Tiebacks Demand More – And What It Takes to Make Them Work

In the first article in this series, I outlined why subsea tiebacks have become the only realistic development route left in the UKCS and why the window to execute them is narrowing fast. But urgency alone doesn’t make a project deliverable. Subsea tiebacks often get described as the quick, low‑CAPEX answer to unlocking remaining reserves, especially in […]

Intervention and abandonment riser systems

Intervention and abandonment riser systems for reliable well access

A complete riser-based solution for intervention and abandonment operations