Portable FTIR Gas Detection System with Dual Pump Flow Control
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Solution Overview
Problem
Current gas detection systems in the oil and gas industry face challenges in accurately and efficiently detecting multiple types of gases in drilling fluids during drilling operations, due to limitations in existing technologies such as laboratory-grade chromatographs which are not robust enough for field conditions, require frequent recalibration, and struggle with precision in distinguishing between similar hydrocarbons like Methane and Ethane.
Innovation Solution
A portable gas detection system incorporating a control module, infrared sensor, and dual pumps positioned on opposite sides of the infrared sensor to provide uniform sample gas flow, utilizing miniaturized Fourier Transform Infrared Spectroscopy (FTIR) technology within an explosion-proof case, capable of adapting to harsh environments and operating independently to ensure accurate and timely gas detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If laboratory-grade chromatographs are used for gas detection, then measurement precision is improved, but device complexity and ease of operation worsen due to frequent recalibration requirements and lack of robustness for field conditions
Solution Approach 1:
The patent replaces complex mechanical chromatography systems with an optical detection system based on Fourier Transform Infrared Spectroscopy (FTIR). This substitution eliminates moving mechanical parts, reduces calibration requirements, and maintains high measurement precision while improving robustness for field deployment.
Solution Approach 2:
The invention changes the detection parameter from mass-based chromatographic separation to optical absorption spectroscopy. By measuring infrared absorption spectra at multiple wavelengths simultaneously, the system achieves precise gas detection without the mechanical complexity and frequent recalibration needed by traditional chromatographs.
2Device complexity
If single pump configuration is used, then device complexity is reduced, but measurement precision deteriorates due to non-uniform gas flow through the sensor
Solution Approach 1:
The gas flow system is segmented into multiple independent pump units, each responsible for specific flow control functions. This segmentation allows precise control of gas flow through different regions of the sensor, ensuring uniform distribution and improving measurement accuracy while maintaining manageable system complexity.
Solution Approach 2:
The system incorporates feedback control where pump operation is adjusted based on real-time monitoring of gas flow uniformity. This feedback mechanism ensures consistent flow distribution across the infrared sensor, maintaining high measurement precision while adapting to varying operational conditions.
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 system enables fast and accurate detection of various gases in drilling fluids, overcoming issues of non-uniform gas flow and pressure, maintaining precision and reliability in field conditions, and reducing the time required for gas analysis, thus enhancing the detection of hydrocarbons and geological formations.
Implementation Method 1
utilizing miniaturized Fourier Transform Infrared Spectroscopy (FTIR) technology
Implementation Method 2
infrared sensor...configured to provide uniform sample gas flow through the infrared sensor to detect multiple different types of gasses
Data Source
AI summary
A system can be constructed and operated with at least a wellbore that is connected to a gas detection system. The gas detection system can house a control module, infrared sensor, and first and second pumps in a portable case. The first and second pumps may be respectively positioned on opposite sides of the infrared sensor and configured to provide uniform sample gas flow through the infrared sensor to detect multiple different types of gasses flowing from the wellbore.