Downhole Web Protector Structure for Thermite Nozzle Erosion
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Solution Overview
Problem
Existing non-explosive downhole tools face issues with nozzle wear and structural integrity due to uncontrolled erosion and inaccurate fuel projection, leading to potential breakage and operational inefficiencies.
Innovation Solution
A downhole tool equipped with a liner and web protector system to minimize erosion and maintain accurate fuel projection, using materials like polyether ether ketone and ceramics to protect the pillars and nozzles from molten thermite fuel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If broader nozzles are used without protection, then the downhole tool can be manufactured more easily, but the nozzle wears out faster causing inaccurate fuel flow and potential breakage
Solution Approach 1:
A web protector made of erosion-resistant material is positioned between the molten thermite fuel and the nozzle/pillar structures. This intermediary component absorbs the erosive impact of the fuel, protecting the nozzle from wear while allowing the nozzle to maintain its original design and manufacturing simplicity.
Solution Approach 2:
The web protector is pre-installed in position before the downhole tool is activated. This protective barrier is already in place to cushion and absorb the erosive forces of the molten fuel before contact with the nozzle, preventing wear and maintaining structural integrity throughout the tool's operational life.
2Manufacturing precision
If smaller, more precise nozzles are used, then fuel projection accuracy is improved, but the nozzle is more susceptible to wear and breakage
Solution Approach 1:
The web protector serves as a protective intermediary that shields the precise nozzle structures from the erosive molten fuel. This allows the use of smaller, more accurate nozzles without compromising their structural integrity, as the web protector absorbs the wear and tear that would otherwise damage these delicate components.
3Productivity
If the downhole tool is used repeatedly without protection, then operational efficiency decreases due to nozzle wear and inaccurate fuel flow, but adding protective components increases device complexity
Solution Approach 1:
The protective system is segmented into separate, modular components including the web protector and erosion-resistant pillars. This segmentation allows the protective elements to be independently designed, installed, and maintained without complicating the overall tool structure, thereby maintaining operational efficiency while providing necessary protection.
4Device complexity
If no protective measures are taken, then the device complexity is minimized, but erosion causes nozzle shape change and tool breakage
Solution Approach 1:
The web protector acts as an intermediary barrier that prevents direct contact between the molten fuel and the nozzle structures. This simple addition maintains relatively low device complexity while effectively preserving the nozzle shape and preventing erosion-related degradation of the tool's composition stability.
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
Enhances the structural integrity and accuracy of fuel projection, reducing tool breakage and improving operational efficiency by minimizing erosion and maintaining nozzle shape and function over multiple uses.
Implementation Method 1
a web protector abutting at least the internal side of the pillar to block the molten fuel from impinging the internal side of the pillar
Implementation Method 2
The liner comprises a flare to focus the molten fuel away from the opening side of the pillar
Implementation Method 3
The thermite fuel comprises a metal and an oxidizer that can oxidize the metal
Data Source
Figure 1~2
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Figure 5~6
AI summary
Apparatus, systems and methods provide protection for components of a downhole tool by using a liner and/or web protector to minimize, block, or prevent erosion of a pillar component, which is adjacent to an opening of the downhole tool, during activation and operation of the downhole tool. The downhole tool comprises a body having an external surface and internal volume configured to store thermite fuel, wherein the thermite fuel is configured to ignite into a molten thermite fuel. The downhole tool comprises an opening extending from the internal volume through the external surface, and a pillar defining one side of the opening, wherein the opening is configured to project the molten thermite fuel. The downhole tool includes web protectors, abutting at least an internal side of the pillar, to block the molten thermite fuel from impinging the internal side of the pillar, thus protecting the components of the downhole tool.