Riser Connector With Bayonet Locking Ring And Removable Retaining System
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Solution Overview
Problem
Existing riser connectors for offshore petroleum operations face challenges such as high assembly time, weight issues at deep water depths, limited removability for inspection and maintenance, and complex manufacturing requirements, particularly due to non-removable locking systems and overthickness issues.
Innovation Solution
A connector design featuring a locking ring with bayonet connections and removable retaining systems that allow for easy assembly and disassembly without specialized tools, enabling inspection and maintenance, while minimizing the connector's space requirements and avoiding overthickness issues through a design with lugs and a sealing sleeve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a locking ring is used to join riser sections, then the connection strength is improved, but the locking system becomes non-removable limiting inspection and maintenance
Solution Approach 1:
The locking system is segmented into a locking ring and separate retaining means (such as retaining rings or clips). The retaining means can be removed independently to allow access to and removal of the locking ring, enabling inspection and maintenance while maintaining connection strength during operation.
Solution Approach 2:
The locking ring is extracted from the permanent structure and made into a removable component. The retaining means serves as a temporary holder that can be taken off during maintenance, allowing the locking ring to be removed for inspection while the riser sections remain connected during normal operation.
2Reliability
If traditional connectors are used, then connection reliability is improved, but assembly time increases
Solution Approach 1:
The locking ring and retaining means are pre-configured with engagement features (such as lugs, slots, or detents) that guide the assembly process. The retaining means is预先 installed on the riser sections, so that when the locking ring is placed, it automatically engages with the retaining means, reducing assembly time while maintaining reliability.
3Strength
If screwed connections with upset pipe method are used, then connection strength is improved, but manufacturing complexity and tool requirements increase
Solution Approach 1:
The complex screwed connection system with upset pipe method is replaced by a mechanical locking system using the locking ring and retaining means. This substitution eliminates the need for hot forging, specialized threading tools, and complex assembly equipment, while maintaining connection strength through the locking mechanism.
4Reliability
If preloaded sleeves are used, then connection reliability is improved, but assembly tool requirements increase
Solution Approach 1:
The locking ring and retaining means are designed to be self-assembling without requiring external preloading tools. The retaining means automatically holds the locking ring in position through mechanical engagement features, eliminating the need for specialized preloading equipment while maintaining connection reliability.
Data Source
AI summary
The invention relates to a connector for assembling two sections of a riser. The connector comprises two riser sections that are assembled by a locking ring with the aid of two bayonet connections. The connector additionally comprises means for securing the locking ring against the connector elements.