Offshore Platform Extension via Monocolumn Foundation Support
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Solution Overview
Problem
Existing methods for extending offshore structures, such as oil and gas platforms, often interfere with ongoing operations, require significant underwater preparation, and increase the weight burden on the existing structure, making them impractical due to engineering challenges and cost considerations.
Innovation Solution
An offshore structure extension method where a platform extension is supported directly by the foundation of the original structure using a monocolumn design that connects laterally, minimizing interference with existing operations and reducing the need for reinforcing the original structure, with a truss system providing lateral stabilization and allowing for minimal underwater preparation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a cantilevered extension structure is used, then the platform can be extended sideways, but the weight of the extension increases the burden on the existing structure
Solution Approach 1:
A new foundation is introduced as an intermediary element between the extension structure and the seabed. This mediator absorbs the weight burden, allowing the extension to be supported independently rather than transferring load to the existing structure. The new foundation acts as a buffer that decouples the extension's weight from the original platform's load-bearing system.
2Area of stationary object
If new decks or cantilevered sections are added to the existing structure, then more space is available, but the existing structure must be taken offline for modifications
Solution Approach 1:
The platform extension is designed as a separate, independent segment with its own foundation and support structure. This segmentation allows the extension to be constructed and installed as a standalone module that can be connected to the existing platform without requiring shutdown of the original structure's operations.
Solution Approach 2:
The new foundation is prepared and the extension structure is assembled in advance, before being connected to the existing platform. This preliminary preparation of the extension as a complete unit enables rapid installation that minimizes disruption to ongoing platform operations.
3Area of stationary object
If an entire new offshore structure is created and linked by a bridge, then additional space is provided, but the cost and complexity increase significantly
Solution Approach 1:
The extension structure is merged with the existing platform through direct structural connection rather than requiring a separate bridge structure. The extension shares the same operational environment and functional integration as the original platform, eliminating the need for additional connecting infrastructure and reducing overall system complexity.
Data Source
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AI summary
An offshore structure comprises: an original structure comprising a main platform supported via a foundation on a seabed; and an extension structure comprising a platform extension positioned laterally of the main platform and a platform extension support, depending downwardly from the platform extension, into contact with the foundation, so as to support the extension structure directly on the foundation.