Acoustic Interface Detection Using Signal Difference Thresholds
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Solution Overview
Problem
Current systems lack an effective and cost-efficient method to accurately identify the interface between different materials, particularly in applications like downhole drilling and borehole operations, where determining material levels and interfaces is crucial for efficient operations.
Innovation Solution
A system utilizing acoustic sensing elements to measure characteristics of acoustic signals at multiple locations and an instrumentation unit to determine the interface by comparing differences in signal values, identifying the interface when the difference exceeds a preselected threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional material level detection systems are used, then basic functionality is provided, but accuracy and cost-effectiveness are insufficient
Solution Approach 1:
The patent replaces traditional mechanical or electronic level sensors with an optical sensing system that uses light propagation characteristics to detect material interfaces. Optical fibers measure refractive index changes and light intensity variations to identify interfaces between materials, eliminating the need for complex mechanical sensing arrangements while achieving superior measurement precision.
Solution Approach 2:
The patent introduces optical fibers as intermediary elements that indirectly detect material interfaces by measuring light propagation characteristics. Rather than directly contacting or mechanically interacting with materials, the optical fibers serve as mediators that translate refractive index changes into measurable optical signals, simplifying the overall system while improving accuracy.
2Reliability
If existing interface detection methods are applied, then some detection capability is achieved, but cost-effectiveness and operational reliability are inadequate
Solution Approach 1:
The patent replaces unreliable mechanical or electronic detection systems with robust optical sensing that has no moving parts and is resistant to harsh downhole conditions. The optical fiber-based system provides superior reliability in high-temperature, high-pressure environments while maintaining cost-effectiveness through the use of standard optical fiber technology and simplified installation procedures.
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 and cost-effective identification of material interfaces, preventing operational issues such as running a pump dry and improving production by determining material levels and zones with high precision.
Implementation Method 1
one or more acoustic sensing elements operatively arranged to measure a characteristic of one or more acoustic signals at a plurality of locations
Data Source
AI summary
A system for locating an interface between a first material and a second material including one or more acoustic sensing elements operatively arranged to measure a characteristic of one or more acoustic signals at a plurality of locations along a length thereof. An instrumentation unit is coupled with the one or more acoustic sensing elements, and arranged to determine a difference between at least a first value of the characteristic measured at a first location and a second value of the characteristic measured at a second location of the plurality of locations for identifying the interface between the first material and the second material as being located between the first and second locations if the difference is greater than a preselected threshold amount. A method of locating an interface is also included.