Split-Ring Bell Mouth Adapter for BSN900E-BSDL Interchangeability

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Solution Overview

Problem

The existing bell mouth models, such as BSN900E and BSMF, are not compatible with the Diverless Bell Mouth (BSDL) model, preventing interchangeability and requiring re-termination and new accessories for project delivery, which increases costs and risks during shallow diving activities.

Innovation Solution

An adapter tool with a split ring is developed to couple a bending stiffener with interface for BSN900E models to a BSDL bell mouth, allowing for interchangeability through two assembly methods: direct fastening and ring/rod support, ensuring compatibility and flexibility between different bell mouth models.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If re-termination of riser top end is performed to change stiffener helmet, then compatibility with BSDL model is achieved, but project delivery time increases and new accessories must be acquired

Engineering Contradiction:

Improvecompatibility with BSDL modelVSAvoidproject delivery time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The adapter device is designed and prepared in advance with both interfaces already configured. This preliminary preparation eliminates the need for time-consuming re-termination operations and acquisition of new accessories during project execution, allowing quick installation to achieve BSDL compatibility.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If re-termination operations are performed to change stiffener helmet, then interface compatibility is improved, but risks during shallow diving activities increase

Engineering Contradiction:

Improveinterface compatibilityVSAvoidrisks during shallow diving activities

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The adapter serves as a mediator that enables interface compatibility without requiring diver intervention for re-termination operations. By providing a pre-configured adapter device that can be installed without changing the stiffener helmet, the solution eliminates exposure to diving risks while achieving the desired interface compatibility.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If new accessories are acquired for re-termination, then compatibility with BSDL model is achieved, but project costs increase

Engineering Contradiction:

Improvecompatibility with BSDL modelVSAvoidproject costs

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The adapter device is designed as a universal component that enables compatibility with BSDL bell mouths while working with existing standardized bell mouth models (BSN900E, BSMF). This multi-functionality allows the same adapter design to serve multiple purposes across different bell mouth types, reducing the need for multiple specialized accessories and lowering overall project costs.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12000218B2Adapter tool for coupling a bend stiffener with interface for bell mouths of models with BSN900E type connection in a diverless bell mouth (BSDL) and interconnection methods

Publication Date: 2024.06.04 PETROLEO BRASILEIRO SA PETROBRAS

AI summary

In order to achieve the objects described above, the present invention provides an adapter tool for coupling a ben stiffener with interface for bell mouths of models with connection type BSN900E in a diverless bell mouth (BSDL), consisting of a adapter split ring (1), guide pin holes (C), fastener eyes (D), and through holes (E). The adapter tool is capable of keeping interchangeability and flexibility between projects or project phases, even if different bellmouth models are used. The interconnection method between the helmet (9) and the adapter split ring (1) can be done by direct attachment by bolt, or by attachment by ring/rod support. Both interconnections can be made on board a flexible line launching vessel, in the case of reusing lines from other projects, or at the factory, in the case of sharing new flexible lines.