Subsea Wye Connector Diverter for Reverse Flow Pigging
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Solution Overview
Problem
Current subsea pipeline fittings, such as piggable wye fittings, are not designed to accommodate reverse flow, causing pigs to jam and disrupting pipeline operations when attempting to pass in reverse direction, which is becoming increasingly common with the rise of reverse pipeline flow considerations.
Innovation Solution
A subsea fitting with a diverter mechanism that can rotate between open and closed positions, allowing for fluid and pig passage in both directions, and featuring orifices to equalize pressure and prevent object flow, enabling operation in both normal and reverse flow conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a diverter mechanism is added to enable reverse flow pigging, then adaptability to reverse flow is improved, but device complexity increases
Solution Approach 1:
The diverter mechanism is designed as a simple rotational component that can be positioned to accommodate both normal and reverse flow directions. This dynamic element adds minimal structural complexity while maximizing adaptability, allowing the fitting to handle pigs in either flow direction through a single rotational movement of the diverter
2Reliability
If orifices are added to equalize pressure between passages, then reliability under pressure is improved, but device complexity increases
Solution Approach 1:
The patent incorporates orifices (small openings) in the diverter component that allow pressure equalization between the passages when the diverter is in certain positions. These porous-like features are integrated into the diverter structure itself, providing pressure balancing functionality without requiring separate complex pressure equalization systems
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
Enables the passage of pigs in both normal and reverse flow directions, preventing jams and ensuring continuous pipeline operation, even under high-pressure subsea conditions.
Implementation Method 1
The orifices allow at least some fluid flow between the two passages to equalize pressure between the two passages
Data Source
AI summary
A subsea fitting is disclosed. The subsea fitting includes a body. The fitting includes at least two passages through the body. The passages are in fluid communication within the body. A diverter is located in at least one of the passages. The diverter may be movable between an open position and a closed position. In the open position, the diverter allows open flow between two of the passages. In the closed position, the diverter inhibits flow between the two passages.