Non-Metallic Bend Stiffener Assembly for Umbilicals
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Solution Overview
Problem
Umbilicals used in industrial operations face challenges with metallic bend stiffeners that are prone to corrosion and cumbersome installation, which can inadequately secure hoses and compromise service life due to bending loads in harsh environments.
Innovation Solution
A bend stiffener assembly utilizing non-metallic components, including a nonmetallic flange member and elastomeric member with frustoconical surfaces, provides bending resistance and secure hose arrangement through a radially inward clamping force, suitable for subsea and other environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metallic bend stiffeners are used, then bending resistance is provided, but corrosion occurs and service life is reduced
Solution Approach 1:
The patent replaces durable metallic bend stiffeners with non-metallic components that are corrosion-resistant and designed for long-term service in harsh environments. The non-metallic flange member and elastomeric member provide sufficient bending resistance without the corrosion issues that limit the service life of metallic alternatives.
Solution Approach 2:
The bend stiffener assembly uses a composite structure combining non-metallic flange member with elastomeric member. This composite approach provides both structural support and flexibility while eliminating corrosion problems associated with metallic materials, thereby extending service life in corrosive environments.
2Strength
If metallic bend stiffeners are used, then bending resistance is provided, but installation becomes cumbersome
Solution Approach 1:
The bend stiffener is divided into separate modular components: a non-metallic flange member and an elastomeric member. This segmentation allows for easier installation compared to monolithic metallic structures, as each component can be independently positioned and secured without requiring complex assembly procedures.
3Reliability
If traditional hose arrangement means are used, then hoses are secured, but installation becomes cumbersome and security is inadequate
Solution Approach 1:
The patent combines the hose arrangement function with the bend stiffener structure by integrating circumferential bores directly into the non-metallic flange member. This merging eliminates the need for separate arrangement means, simplifying installation while ensuring secure hose positioning through the integrated bore structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The non-metallic bend stiffener assembly effectively resists dynamic and static bending loads, extends service life, and simplifies installation while maintaining adequate strength and durability, ensuring reliable operation in various industrial settings.
Implementation Method 1
an elastomeric member coupled to the flange member and having a central bore for receiving the tubular member, wherein the elastomeric member is configured to provide a bending resistance to a tubular member extending therethrough
Implementation Method 2
the flange member is configured to provide a radially inward clamping force on an outer surface of the arrangement member in response to a compressive force applied to a front face of the arrangement member
Data Source
AI summary
A bend stiffener assembly for coupling a tubular member includes a nonmetallic flange member having a central bore for receiving a tubular member and an elastomeric member coupled to the flange member and having a central bore for receiving the tubular member, wherein the elastomeric member is configured to provide a bending resistance to a tubular member extending therethrough.