Pipeline Inspection Stabilizer for Central Alignment in Bends
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Solution Overview
Problem
Pipeline inspection devices face challenges in maintaining a centralized position within fluid-filled pipelines, especially when encountering bends and inline valves, due to forces like wobbling, negative buoyancy, and changing cable tension, which can lead to inaccurate data collection from sensors.
Innovation Solution
A stabilizer system comprising forward and rear spacers that extend to contact the pipeline wall, maintaining the inspection equipment at a substantially centralized position by spacing it from the wall and resisting external forces, ensuring axial alignment within about 3% of the longitudinal center.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the inspection equipment is deployed into the pipeline to inspect the entire interior surface, then comprehensive inspection coverage is achieved, but the equipment cannot maintain a substantially centralized position due to forces from drogue movement, negative buoyancy, and cable tension changes
Solution Approach 1:
The stabilizer is divided into multiple independent spacers (forward spacer, rear spacer, and side spacers) that can individually contact the pipeline wall to provide distributed stabilization forces, allowing the inspection equipment to maintain centralized position while achieving comprehensive inspection coverage
Solution Approach 2:
The spacers act as counterbalancing elements that resist the destabilizing forces (drogue wobble, negative buoyancy, cable tension) by contacting the pipeline wall and providing opposing forces, thereby maintaining the inspection equipment in a substantially centralized position
2Adaptability or versatility
If the transducer is not centrally aligned within the pipeline, then the equipment can navigate bends and valves more easily, but acoustic reflections from the wall are deflected away from the receiving transducer causing signal loss
Solution Approach 1:
The stabilizer with multiple spacers proactively counteracts forces that would cause misalignment before they can deflect acoustic reflections away from the transducer, maintaining centralized position and ensuring signal strength while still allowing navigation through bends and valves
3Ease of operation
If the inspection equipment is positioned close to the pipeline wall, then it can inspect the interior surface during flow conditions, but forces from drogue movement and cable tension cause the equipment to move away from the centralized position
Solution Approach 1:
The spacers are positioned to contact the pipeline wall in advance, creating a stabilizing framework that maintains axial alignment and centralized position before destabilizing forces from drogue movement and cable tension can cause misalignment, enabling inspection capability during flow conditions
Data Source
AI summary
There is provided a pipeline inspection device stabilizer apparatus for use with a pipeline inspection device configured to assess the condition of a pipeline while being carried by a moving liquid in the pipeline, the device including an inspection module, the apparatus comprising a forward spacer secured in front of the inspection module and a rear spacer secured behind the inspection module, each of the front spacer and the rear spacer configured to move between a collapsed position close to the device and an outward position extending away from the device and towards the pipeline wall, wherein when in the outward position the front and rear spacers contact the pipeline wall to distance the inspection module from the pipeline wall and maintain axial alignment or substantial axial alignment of the inspection module with the longitudinal center of the pipeline.