Self-Powered Microsensors for Hydraulic Fracturing Monitoring
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Solution Overview
Problem
Hydraulic fracturing operations face challenges in accurately measuring and monitoring conditions within high-pressure, high-temperature environments due to the limitations of conventional sensors, which are often damaged by corrosive materials and cannot operate effectively in such harsh conditions.
Innovation Solution
The development of self-powered microsensors that can generate power from their environment using energy harvesters, such as electrochemical or thermal generators, and are designed with materials like graphene and GaN to withstand extreme temperatures, enabling them to perform in-situ spatial and temporal measurements during and after hydraulic fracturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sensors are used in hydraulic fracturing, then they can measure conditions initially, but they are damaged by high temperatures, high pressures, and corrosive materials
Solution Approach 1:
The patent employs composite material structures for sensor packaging that combine multiple materials with complementary properties to resist high temperature, high pressure, and corrosive chemicals simultaneously. This multi-material approach creates a protective system that no single material could achieve alone, directly resolving the contradiction between sensor reliability and environmental harshness.
Solution Approach 2:
The patent creates a protected internal environment for the sensor electronics using inert or controlled atmospheres and barrier layers that prevent corrosive fracturing fluids from contacting sensitive components. This isolates the sensor from harmful chemical factors while maintaining measurement capability, addressing the durability versus environmental damage contradiction.
2Volume of moving object
If sensors are made small to be positioned in fractures, then they can access measurement locations, but they lack power sources and are difficult to retrieve
Solution Approach 1:
The patent implements self-powered sensors that harvest energy from the hydraulic fracturing environment itself, such as converting mechanical stress from fluid pressure or temperature differentials into electrical power. This eliminates the need for external power sources or battery replacement, allowing miniaturized sensors to operate autonomously in remote fracture locations.
Solution Approach 2:
The patent uses biodegradable or dissolvable coating materials as intermediaries that protect the sensor during injection and deployment, then gradually degrade to allow sensor retrieval or controlled dissolution after the measurement mission is complete. This intermediary layer solves the retrieval problem without requiring complex mechanical retrieval mechanisms that would increase sensor size.
3Measurement precision
If sensors are deployed to map fracture geometry, then spatial and temporal data is obtained, but the harsh environment damages conventional sensor materials
Solution Approach 1:
The patent selects and designs sensor materials and packaging with specific physical and chemical parameters optimized for high-temperature, high-pressure environments. This includes using materials with appropriate thermal expansion coefficients, yield strengths, and chemical resistance parameters that maintain measurement precision while withstanding the fracturing environment.
Solution Approach 2:
The patent employs pre-designed protective packaging and material selection that anticipates and cushions against the harsh fracturing environment before the sensor is deployed. This includes thermal barriers, pressure-resistant housings, and corrosion-resistant coatings that are integrated into the sensor design from the outset, protecting measurement components while maintaining measurement accuracy.
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
These microsensors can operate autonomously, providing accurate data on temperature, pressure, and fluid presence within fractures, enhancing the monitoring and mapping of hydraulic fracturing processes while surviving the harsh conditions, thus improving the efficiency and effectiveness of the fracturing operations.
Implementation Method 1
self-powered microsensors that can generate power from their environment using energy harvesters, such as electrochemical or thermal generators
Implementation Method 2
self-powered microsensors that can generate power from their environment using energy harvesters, such as electrochemical or thermal generators
Data Source
AI summary
A delayed-activation sensor system includes at least one microsensor. The microsensor may include at least one sensor module for sensing a condition in an environment and a dissolvable coating encapsulating at least a portion of the at least one sensor module such that the dissolvable coating prevents the at least one sensor module from sensing the condition in the environment. The dissolvable coating may be dissolvable in a fluid in the environment such that the sensor module is activated after being located in the environment for a period of time. The microsensor may also include at least one energy harvester module to generate electrical power for the microsensor from the environment.