Overview

Bringing new levels of safety and productivity to placing subsea protective bags and mattresses

In response to rising demand for safe and efficient installation of subsea protection products, Seatools has developed the innovative Subsea Lifting Frame (SLF). This lifting frame transports and ensures precision positioning and installation of subsea protection products, including concrete mattresses, rock filter units and grout bags.

Such protection products are typically used to stabilize subsea pipelines and cables, and as scour protection around monopile foundations. The remotely operated SLF facilitates highly automated installation operations and enables installation contractors to achieve significant time savings – a critical parameter when performing capital-intensive offshore installation operations.

Drawing upon Seatools’ extensive capabilities in the field of subsea positioning and control engineering, the SLF features automatic heading control. The SLF lifting beam can be upgraded with automated position control, for precision positioning of scour protection products without the need for either divers or a WC-ROV. This significantly boosts both operational safety as well as efficiency.

Purpose concept

• Accurate, safe and efficient transportation, positioning and installation of subsea protection products, including concrete mattresses and filter bags

Key features

• Enables safe installation operations
• Reduced cycle times
• Fail safe system design

The remotely operated Subsea Lifting Frame facilitates highly automated installation operations and enables installation contractors to achieve significant time savings. Learn more?

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Key features

1. Enables safe installation operations

   No more need for divers, thereby significantly improving operational safety.

2. Reduced cycle
   times

   Irrespective of the environmental conditions (e.g. strong tidal streams), subsea mattress installation can be executed extremely efficiently, thanks to auto heading and auto positioning features.

3. Fail safe system
   design

   The Intelligent Subsea Lifting Frame features a dual redundant release mechanism. In the unlikely event of hydraulic system failure, the release mechanism can be actuated by means of a WC-ROV.

Concept impression

Scour protection around a monopile by means of filter bag installation

Related solution categories

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