Deformable Downhole Articles with Conductive Fillers for Sealing Monitoring
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Solution Overview
Problem
Conventional downhole materials and tools often fail to effectively seal wellbores due to inadequate expansion or degradation, leading to fluid mixing and operational inefficiencies, and are prone to corrosion in aggressive environments, making it difficult to monitor their condition.
Innovation Solution
The use of deformable or degradable downhole articles incorporating electrically conductive materials, such as carbon nanotubes, which expand or degrade in response to wellbore conditions, allowing for real-time monitoring through changes in electrical resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If deformable materials are used to seal annular spaces, then sealing effectiveness is improved, but monitoring of material condition and expansion is difficult
Solution Approach 1:
The patent applies the principle of using measurable physical property changes (electrical resistance) analogous to color changes. Electrically conductive materials dispersed in the deformable material cause the electrical resistance to change in response to expansion, contraction, or degradation, providing a detectable signal that indicates the material's condition and performance status.
Solution Approach 2:
The patent replaces direct mechanical measurement systems with an electrical field-based monitoring system. Instead of using mechanical sensors or visual inspection methods, the invention uses changes in electrical resistance caused by the movement or degradation of conductive materials within the deformable matrix to indicate material condition and sealing effectiveness.
2Reliability
If swellable packers are used to fill annular space, then sealing capability is improved, but placement and setting effectiveness deteriorates
Solution Approach 1:
The patent implements feedback by using the electrical resistance changes as real-time indicators of packer expansion and sealing status. The change in electrical resistance provides feedback information about whether the packer has properly expanded and sealed the annular space, allowing operators to verify placement and setting effectiveness without additional complex monitoring systems.
3Productivity
If downhole tools are exposed to aggressive environments, then operational functionality is maintained, but corrosion and degradation increase
Solution Approach 1:
The patent converts the harmful effect of aggressive downhole environments (which cause corrosion and degradation) into a beneficial monitoring opportunity. The same chemical and physical conditions that degrade the downhole tool also cause measurable changes in electrical resistance of the conductive materials, allowing the degradation process itself to be detected and monitored rather than merely causing failure.
4Ease of manufacture
If conventional materials are used in wellbores, then manufacturing simplicity is maintained, but measurement and detection of material state becomes difficult
Solution Approach 1:
The patent uses composite materials by dispersing electrically conductive materials (such as carbon nanotubes, metal particles, or conductive polymers) within the deformable material matrix. This composite structure maintains the deformability and sealing properties of the base material while adding the electrical conductivity necessary for monitoring, achieving both manufacturing feasibility and measurement capability.
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
Enables accurate determination of expansion, contraction, or degradation of downhole materials, effectively sealing annular spaces and preventing fluid mixing, while providing real-time monitoring of wellbore conditions, enhancing operational efficiency and reliability.
Implementation Method 1
deformable or degradable downhole articles including electrically conductive materials dispersed therein, and methods of forming and using such deformable downhole articles
Implementation Method 2
electrically conductive materials dispersed therein
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
A method of determining a condition within a wellbore. The method comprises introducing a tubular member in a wellbore extending through a subterranean formation, the tubular member comprising a downhole article including a deformable material disposed around a surface of the tubular member, electrically conductive elements dispersed within the deformable material. The method includes measuring at least one electrical property of the deformable material. At least one of water ingress into the wellbore or an amount of expansion of the deformable material is determined based on the at least one measured electrical property. Related downhole systems and other related methods are also disclosed.