Inline Hub Block Manifold Layout for Compact Subsea Branch Installation
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Solution Overview
Problem
Current seabed pipeline manifold systems are cumbersome and large, making them difficult to install during pipeline assembly on vessels, requiring additional equipment and space, and are not easily adaptable to varying seabed conditions like sand or mud.
Innovation Solution
A compact inline block manifold system with hub blocks and flowline spacer pipes that allows for the integration of multiple branches, enabling installation through vessel tensioners and stingers, and includes a mud mat configuration for secure seabed placement, with telescopic arms for stability and reduced stress on the pipeline.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional manifold structures are used, then multiple parallel branches can be installed, but the structure becomes too large and heavy to pass through conveyors on the pipeline section assembly line
Solution Approach 1:
The manifold is divided into multiple modular hub blocks, each handling a subset of branches. This segmentation allows the manifold to be assembled in compact sections that can pass through conveyors, while still providing multiple parallel branch connections when assembled together on the seabed.
Solution Approach 2:
The hub blocks are designed with an optimized three-dimensional configuration that reduces the overall envelope volume. By arranging flowline bores and branch bores in specific spatial relationships (perpendicular and inline configurations), the manifold achieves high branching capacity within a compact footprint that fits through assembly line conveyors.
2Adaptability or versatility
If traditional manifold structures are used, then multiple parallel branches can be installed, but the weight becomes too high for installation during pipeline assembly on vessels
Solution Approach 1:
The manifold is divided into multiple modular hub blocks, each handling a subset of branches. This segmentation allows the manifold to be assembled in compact sections that can pass through conveyors, while still providing multiple parallel branch connections when assembled together on the seabed.
Solution Approach 2:
Each hub block is designed with optimized local material distribution and wall thicknesses tailored to the specific pressure and flow requirements of its branches. This localized optimization reduces overall weight while maintaining structural integrity and pressure containment capabilities.
3Adaptability or versatility
If traditional manifold structures are used, then manifold functionality is achieved, but additional connecting spools and equipment are required
Solution Approach 1:
Multiple functional elements are merged into integrated hub blocks. Each hub block combines flowline connections, branch connections, valve bores, and alignment geometries into a single modular unit. This integration eliminates the need for separate connecting spools and reduces the number of individual components required to achieve the same manifold functionality.
Solution Approach 2:
The hub blocks are designed as universal modules that can handle multiple functions: flowline connection, branch connection, valve installation, and alignment. This multi-functionality reduces the need for specialized connecting equipment and spools, as each hub block serves multiple purposes in the overall manifold system.
4Stability of the object's composition
If production equipment is placed on mud mats, then stability on sand or mud seabed is achieved, but available space for assembly on the vessel is limited
Solution Approach 1:
The manifold is divided into multiple modular hub blocks, each handling a subset of branches. This segmentation allows the manifold to be assembled in compact sections that can pass through conveyors, while still providing multiple parallel branch connections when assembled together on the seabed.
Solution Approach 2:
The hub blocks are designed with an optimized three-dimensional configuration that reduces the overall envelope volume. By arranging flowline bores and branch bores in specific spatial relationships (perpendicular and inline configurations), the manifold achieves high branching capacity within a compact footprint that fits through assembly line conveyors.
Data Source
AI summary
The present invention relates to a hub block (2) with two hubs (3a, 3b), each configured for connection with a branch pipe from a well. The two hubs are in line with each other. A flowline bore (12) extends between flowline inlet and exit ports (5, 10). The flowline bore (12) is intersecting and in fluid connection with two branch bores (23a, 23b) extending from the flowline bore (12) and to the hubs (3a, 3b). Two valve bores (11a, 11b) extend across the branch bores (23a, 23b). Furthermore the invention relates to a 2-slot inline block (1) with a hub block (2) and a manifold assembly of a plurality of 2-slot inline blocks (1).