Subsea foundations

The subsea foundation system with a mooring base and embedded deadman anchors addresses the high cost and complexity of existing solutions by offering a simple and flexible installation process for anchoring mooring lines, achieving cost-effective and efficient anchoring.

GB2634235APending Publication Date: 2025-04-09SUBSEA 7 NORWAY AS
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Patent Information

Application Number
GB2023015111
Authority / Receiving Office
GB · GB
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-10-02
Publication Date
2025-04-09

AI Technical Summary

Technical Problem

Existing subsea foundations for anchoring mooring lines of floating installations, such as floating wind turbines or hydrocarbon platforms, are costly and complex to install, with traditional solutions like suction piles and deadman anchors either requiring large sizes or complicating installation processes, and existing alternatives like concrete-block foundations are bulky and expensive.

Method used

A subsea foundation system comprising a mooring base laid on the seabed anchored by embedded deadman anchors, with links extending through the seabed soil to couple the base to the anchors, allowing for a simple and flexible installation process.

Benefits of technology

The solution provides a low-cost, efficient, and easily installable subsea foundation that effectively anchors mooring lines without increasing size or complexity, reducing capital and installation costs.

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Abstract

A subsea foundation 16 for anchoring a mooring line 14 comprises a mooring base 20, such as a chain that is simply laid upon the seabed in a straight, curved or looped configuration, hence extending across the seabed 18 substantially parallel to the seabed. The mooring base is then anchored by one or more deadman anchors 22 that are embedded in the seabed soil. For this purpose, one or more links 24 extend through the soil to couple the mooring base to the or each deadman anchor. One or more mooring lines can then be coupled to the mooring base.
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