Severe Plastic Deformation for Degradable Downhole Components
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Solution Overview
Problem
Existing materials used in downhole operations, such as drilling, cementing, and fracturing, do not adequately address the need for components that can withstand high-pressure and high-temperature conditions while being degradable to facilitate subsequent operations.
Innovation Solution
Processing materials through severe plastic deformation and surface mechanical attrition treatment to create degradable components with aluminum and specific metals, forming a degradable component with grain boundary materials that include alkali, alkaline earth, and group 12 transition metals, allowing for controlled degradation under downhole conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional materials are used in downhole operations, then ease of manufacture is maintained, but the materials cannot withstand high-pressure and high-temperature conditions while being degradable
Solution Approach 1:
The patent employs composite materials consisting of aluminum alloy grains combined with grain boundary materials containing alkali metals, alkaline earth metals, group 12 transition metals, or basic metals with atomic number ≥31. This composite structure enables the material to simultaneously achieve high strength and reliability under downhole conditions while maintaining degradability through controlled grain boundary dissolution.
Solution Approach 2:
The patent utilizes severe plastic deformation processes including equal channel angular pressing (ECAP) and surface mechanical attrition treatment (SMAT) to fundamentally change the microstructural parameters of the material. These processes create ultrafine-grained structures with specific grain boundary characteristics that enable both high strength and controlled degradation, transforming conventional material properties.
2Strength
If severe plastic deformation processing is applied to create degradable components, then mechanical properties under high-pressure and high-temperature conditions are enhanced, but processing complexity increases
Solution Approach 1:
The patent applies severe plastic deformation processes such as ECAP and SMAT during the manufacturing stage to pre-establish the desired ultrafine-grained microstructure and grain boundary characteristics. This preliminary action ensures the material possesses the required strength and degradability before deployment, eliminating the need for complex in-situ modifications during downhole operations.
Solution Approach 2:
The patent replaces conventional mechanical strengthening methods with severe plastic deformation processes that induce fundamental microstructural changes. Instead of relying on traditional heat treatment or alloying alone, the material strength is achieved through controlled grain refinement and grain boundary engineering, providing superior performance under downhole conditions.
3Ease of operation
If degradable components are designed for controlled degradation, then subsequent operations are facilitated, but the components may degrade prematurely under downhole conditions
Solution Approach 1:
The patent applies local quality by creating distinct regions within the material structure: strong aluminum alloy grains provide mechanical strength and structural integrity, while grain boundary materials with specific compositions (alkali metals, alkaline earth metals, group 12 transition metals, or basic metals with atomic number ≥31) provide controlled degradation pathways. This spatial differentiation of properties enables the material to resist premature degradation while ensuring controlled breakdown when needed.
Solution Approach 2:
The patent introduces dynamic characteristics by designing the grain boundary materials to respond to downhole environmental conditions (temperature, pressure, fluid exposure). The grain boundaries act as dynamic weak points that remain stable during operational phases but facilitate controlled degradation when environmental thresholds are reached, enabling the material to adapt its degradation behavior to operational requirements.
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 processed materials exhibit enhanced mechanical properties under high-pressure and high-temperature conditions and degrade as needed, enabling efficient and controlled operations in geologic environments.
Implementation Method 1
processing material via at least one severe plastic deformation process to form a degradable component
Implementation Method 2
processing material via equal channel angle pressing to generate processed material
Implementation Method 3
processing the processed material via surface mechanical attrition treatment processing to form a near surface layer that includes properties that differ from properties of an adjacent layer
Data Source
AI summary
A method can include processing material via at least one severe plastic deformation process to form a degradable component where the material includes aluminum and one or more metals selected from a group of alkali metals, alkaline earth metals, group 12 transition metals, and basic metals having an atomic number equal to or greater than 31.