Pipeline Passage Indicator With Labyrinth Flow Path Against Debris Fouling
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Solution Overview
Problem
Pipeline passage indicators in the oil and gas industry are prone to malfunction due to debris fouling the lower magnet, which is exposed to pressurized fluid and debris, leading to ineffective operation.
Innovation Solution
A labyrinthine flow path and debris pockets are integrated into the pipeline passage indicator design to minimize debris contact with the lower magnet, creating a circuitous flow path that traps and retains contaminants, thereby protecting the magnet from fouling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lower magnet is exposed to pressurized fluid for operational function, then the magnet can be pushed by fluid pressure to trigger the indicator, but debris in the fluid will foul the magnet and cause malfunction
Solution Approach 1:
The device is divided into two separate chambers: a lower chamber exposed to pressurized fluid for receiving the triggering force, and an upper chamber housing the magnet protected from debris. The inner wall with opening connects these chambers, allowing force transmission while blocking debris access to the magnet.
Solution Approach 2:
The inner wall acts as an intermediary structure between the lower fluid-exposed chamber and the upper magnet chamber. It transmits the pushing force from the lower chamber to the magnet in the upper chamber while preventing direct contact between debris and the magnet.
2Productivity
If the lower magnet is directly exposed to pressurized fluid and debris, then the trigger mechanism can be activated by fluid pressure, but the magnet will accumulate debris and fail to function
Solution Approach 1:
The device is divided into two separate chambers: a lower chamber exposed to pressurized fluid for receiving the triggering force, and an upper chamber housing the magnet protected from debris. The inner wall with opening connects these chambers, allowing force transmission while blocking debris access to the magnet.
Solution Approach 2:
The magnet is extracted from the direct exposure to the fluid and debris environment and placed in a separate upper chamber. This extraction allows the magnet to be protected from harmful debris while still receiving the necessary mechanical force from the lower chamber through the inner wall opening.
3Reliability
If the magnet is protected from debris by sealing it in a separate chamber, then reliability is improved, but the triggering mechanism becomes more complex
Solution Approach 1:
The device is divided into two separate chambers: a lower chamber exposed to pressurized fluid for receiving the triggering force, and an upper chamber housing the magnet protected from debris. The inner wall with opening connects these chambers, allowing force transmission while blocking debris access to the magnet.
Solution Approach 2:
The upper chamber containing the magnet is nested within the overall indicator structure, with the inner wall forming part of the chamber configuration. This nested arrangement allows for compact design while maintaining the protective separation between the magnet and debris-containing fluid.
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
The design effectively isolates the lower magnet from debris, enhancing its operational lifespan and reliability by maintaining the magnet's functionality to trigger the flag indicator.
Implementation Method 1
The top surface of the first or lower magnet and the bottom surface of the second or upper magnet have the same polarity. As such, when the lower magnet moves up into sufficiently close proximity to the upper magnet, the lower magnet will cause the upper magnet to move upwardly without touching it.
Data Source
AI summary
Pipeline passage indicators for signaling the presence of a pig in a pipeline are disclosed. A pipeline passage indicator may house an upper magnet and a lower magnet in separate bores within the pipeline passage indicator. A flag attached to an upper end of the pipeline passage indicator is moveable from a first position to a second position in response to upward movement of the upper magnet. A labyrinth member defining a circuitous flow path is moveable from a first position to a second position in response to movement of a trigger from a first position to a second position. Movement of the labyrinth member will cause the lower magnet to move from its first position to its second position, which will cause the upper magnet to move from its first position to its second position and thereby move the flag from its first position to its second position.