Laser Hydrogen Bake-Out for In Situ Pipeline Components
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Solution Overview
Problem
Hydrogen embrittlement in metal components of oil and gas systems leads to material failure due to hydrogen diffusion and pressure buildup, causing cracking and loss of mechanical properties, which existing heating methods fail to address effectively, especially in hard-to-reach areas without disassembly.
Innovation Solution
The use of a laser as a heat source to bake out hydrogen from metal components, providing controlled and efficient heating, allowing for in situ treatment of components like pipelines and vessels, reducing hydrogen concentration and preventing embrittlement, with parameters such as power, wavelength, and scan speed optimized for specific materials and geometries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional heating methods (torch or oven) are used to bake out hydrogen, then hydrogen removal can be achieved, but the heating is not even and requires disassembly of components
Solution Approach 1:
The patent replaces traditional mechanical heating systems (torches, ovens) with a laser-based heating system. The laser provides concentrated, controllable thermal energy that can be directed precisely at hydrogen-affected zones without requiring physical access or disassembly of pipeline components, thereby enabling in situ treatment while maintaining effective hydrogen removal.
Solution Approach 2:
The laser heating system applies thermal energy locally and selectively to specific regions of the pipeline component where hydrogen embrittlement is present. This localized heating approach allows for even temperature distribution in the treatment zone without requiring disassembly, improving both effectiveness and operational ease.
2Reliability
If traditional heating methods are used, then hydrogen bake-out can be performed, but the process takes a long time
Solution Approach 1:
The substitution of traditional low-power heating systems with a high-power laser system enables rapid heating and faster hydrogen diffusion out of the metal matrix. The laser's concentrated energy delivers thermal treatment much more quickly than conventional methods, significantly reducing bake-out time while maintaining removal effectiveness.
Solution Approach 2:
The laser heating system can be applied in controlled periodic cycles, allowing for efficient heat penetration and hydrogen outgassing. This periodic thermal action accelerates the bake-out process compared to continuous low-intensity traditional heating methods.
3Reliability
If traditional heating methods are used, then hydrogen can be removed, but the method is less cost-effective and less efficient
Solution Approach 1:
The laser-based system replaces expensive and inefficient traditional heating equipment with a more cost-effective solution. The laser requires no disassembly, minimal setup time, and reduced operational costs, making the hydrogen removal process more economically viable while maintaining high effectiveness.
Solution Approach 2:
The laser system is self-contained and portable, requiring no external infrastructure like ovens or torch equipment. This self-service capability eliminates the need for complex setup and reduces operational costs, improving cost-effectiveness compared to traditional methods.
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
This method maintains material integrity by efficiently reducing hydrogen embrittlement, offering more even and cost-effective heating, enabling in situ treatment of complex geometries and reducing processing time, while avoiding microstructure changes and surface melting.
Implementation Method 1
using a laser to heat a component including a material having a first hydrogen concentration to remove hydrogen from the material
Implementation Method 2
Hydrogen atoms can diffuse through a metal, either at high temperatures where the solubility of hydrogen is increased
Data Source
AI summary
The disclosure relates to methods to bake-out hydrogen from a metal component using a laser as the heat source. The metal component can be a component of an oil and gas system, such as a pipeline or vessel.