Mechanical Riser Connector Locking for Diverless Vessel Support
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Solution Overview
Problem
Existing riser support systems for floating vessels are complex, require divers for operation, and may fail due to hydraulic actuation, necessitating a simpler and more reliable mechanism.
Innovation Solution
A system comprising a receiver and connector with mechanical latching, anchoring, and locking mechanisms that allow for diverless operation, using triggers, anchors, and locks to secure tubular components to a floating vessel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydraulic or other forms of actuation are used in existing riser support systems, then the system can achieve complex functions, but the system becomes subject to failure and requires more complex arrangements
Solution Approach 1:
The patent replaces hydraulic actuation systems with a purely mechanical trigger-based latching mechanism. The trigger (140) mechanically initiates the movement of the latch (130) from retracted to extended condition, eliminating hydraulic components that are subject to failure. This mechanical substitution maintains functional complexity while significantly improving reliability by removing fluid-powered actuation systems.
Solution Approach 2:
The latch mechanism is designed to be self-actuating through the trigger mechanism. Once the trigger is mechanically initiated, the latch automatically moves to the extended condition and latches into the latch profile without requiring external hydraulic control. The system serves itself through mechanical energy storage and release, eliminating the need for continuous hydraulic power supply and control systems.
2Reliability
If existing riser support systems are designed with complex arrangements, then they can achieve secure support, but they require divers for operation and are harder to maintain
Solution Approach 1:
The patent replaces complex hydraulic operation systems with a simple mechanical trigger mechanism that can be operated without divers. The trigger (140) is designed to be mechanically actuated from the surface or by simple manual intervention, eliminating the need for diver intervention in complex hydraulic systems. This maintains secure support functionality while dramatically simplifying operation.
Solution Approach 2:
The connector (120) is divided into distinct functional segments: the trigger mechanism (140), the latch (130), and the anchor (150). This segmentation allows each component to be independently designed and operated for its specific function, making the overall system easier to operate and maintain while achieving secure support through the coordinated action of these simplified modular components.
3Strength
If existing systems use double balconies or complex arrangements, then they can support risers, but the structures become more complicated and require more maintenance
Solution Approach 1:
The patent merges the support function into a single integrated connector (120) that combines the latch (130) and anchor (150) mechanisms. This eliminates the need for separate double balcony structures or multiple support systems, achieving the same support capacity through a unified mechanical assembly that is simpler in structure and requires less maintenance.
Solution Approach 2:
The anchor (150) is pre-configured with the latch mechanism so that when the trigger is actuated, the anchor automatically engages with the receiver bore in a predetermined sequence. This preliminary configuration of the mechanical components ensures strong support capacity while eliminating the need for complex multi-stage installation procedures or additional structural elements.
Data Source
AI summary
A system facilitates communication between a vessel and a subsea environment using a tubular component. The system includes a receiver and a connector. The receiver, mounted on the vessel, features a bore with an engagement shoulder and latch profile. The connector, attached to the tubular component, consists of a latch mechanism, trigger mechanism, wedge mechanism, and lock mechanism. The latch can move from a retracted to an extended position, allowing it to engage with the latch profile in the receiver's bore. The trigger, connected to the latch, activates when it contacts the engagement shoulder, moving the latch into its extended position. The wedge, coupled to the latch, wedges against the bore when the latch is extended. Finally, the lock mechanism secures the wedge in place by moving from an unlocked to a locked position, ensuring the wedge remains fixed against the bore of the receiver.