Multiline Riser Big Bore Connector Rotational Fixation
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Solution Overview
Problem
Existing offshore drilling systems face challenges in efficiently connecting a riser to a BOP stack, particularly in open water drilling configurations, where conventional connections require external structures, are limited to small bore applications, and lack features like buoyancy-assisted disconnect and winch-assisted connection.
Innovation Solution
The use of a connector with multiple bores machined into a cylindrical forging, which forms a fluid connection to a mating female receptacle on a different assembly without any existing structural connection, along with a connector housing that includes annular flow path connections and a guide ledge system for rotational fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional connections are used to connect riser to BOP stack, then external structures are required, but device complexity increases and applicability is limited to small bore only
Solution Approach 1:
The connector integrates multiple functions into a single component: it provides structural support, creates fluid communication pathways, and enables both small bore and large bore applications. The connector body combines receiving cavities, flow paths, and connection interfaces in one unified structure, eliminating the need for separate external connection structures.
Solution Approach 2:
The connector is designed to accommodate multiple bore sizes through its universal interface design. The receiving cavity and flow path configuration allow it to connect both small bore and large bore risers to the BOP stack, making it applicable across different drilling scenarios without requiring specialized connection equipment for each bore size.
2Adaptability or versatility
If connector with multiple bores machined into cylindrical forging is used, then fluid connection is achieved without existing structural connection, but manufacturing precision requirements increase
Solution Approach 1:
Multiple bores are machined into a single cylindrical forging as integrated flow paths rather than attempting to connect separate components. The connector body combines multiple bore channels, receiving cavities, and connection interfaces in one monolithic structure, achieving fluid communication without requiring pre-existing structural connections between separate parts.
Data Source
AI summary
Systems and methods for connecting flow lines include a connector housing having an inner guide ledge and a slot formed on an inner surface and a first connection passage. A connector having a connector protrusion is configured to be fitted within the slot to rotationally fix the connector within the connector housing and a first annular flow path connection formed between the connector housing and the connector, where the first connection passage through the connector housing intersects with the first annular flow path connection. Methods include providing a connector housing connected to a BOP stack, inserting the connector into the connector housing, where, when the connector is in the fixed position, a first annular flow path connection is formed between the connector housing and the connector, and the first bore is in fluid communication with the first annular flow path connection.