Sulfur Detection via Flow Rate Differential in Fluid Conduits
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Solution Overview
Problem
Existing systems face challenges in quickly and accurately detecting trace amounts of contaminants like sulfur in fluid streams, leading to decreased production rates and increased corrosion due to sulfur deposition in oil and gas production systems.
Innovation Solution
A sulfur detection system that induces sulfur deposition into an exposed line, altering its geometry and flow rate, while a control line isolated from the fluid stream provides a baseline for comparison, allowing for rapid detection of sulfur concentrations through flow rate comparisons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional sulfur detection methods are used, then detection capability is maintained, but detection speed is slow and detection time is long
Solution Approach 1:
The system performs preliminary actions by isolating the control line from the fluid stream before sulfur deposition occurs, establishing a baseline flow rate in advance. This allows rapid comparison measurements to be made after exposure, significantly reducing the overall detection time while maintaining accurate sulfur concentration measurement capability.
Solution Approach 2:
The detection system is segmented into multiple parallel fluid paths: a control line that remains isolated from the sulfur-containing fluid and exposed lines that are exposed to the fluid. This segmentation allows simultaneous operation of baseline measurement and sulfur deposition measurement, enabling fast detection without compromising accuracy.
2Measurement precision
If sulfur concentration is low, then production impact is reduced, but detection difficulty increases
Solution Approach 1:
The system creates a copy of the fluid path (the control line) that mirrors the exposed line's geometry and flow characteristics. By comparing the flow rates between the control line and exposed line, even trace sulfur concentrations can be detected with high precision, as the differential measurement amplifies the effect of sulfur deposition while canceling out background variations.
Solution Approach 2:
The system changes the measurement parameter from absolute flow rate to differential flow rate between control and exposed lines. This parameter transformation enhances measurement precision for trace sulfur detection by eliminating background noise and focusing only on the sulfur-induced flow changes, making even low concentrations detectable and measurable.
3Reliability
If sulfur deposits form restrictions, then fluid flow is constricted, but production rate decreases
Solution Approach 1:
The system implements feedback by continuously monitoring the flow rate differential between the control line and exposed line. When sulfur deposition causes flow restriction, the system detects this change and can trigger alerts or control actions to prevent further deposition, thereby maintaining flow path integrity while minimizing production impact through early detection and response.
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 faster detection of sulfur concentrations, enabling timely adjustments to operating conditions, thereby improving production rates and reducing corrosion by comparing flow rates between the control and exposed lines.
Implementation Method 1
The RO has an orifice diameter and is configured to constrict flow of the fluid
Implementation Method 2
Sulfur deposition may occur within these applications, even when the sulfur concentration is low (e.g., 10 parts per billion by volume)
Data Source
AI summary
A contaminant detection system has a fluid path. A meter and a plurality of fluid conduits are disposed along the fluid path. The meter is configured to detect an operating parameter of a fluid. The plurality of fluid conduits forms a plurality of intermediate fluid paths. Each fluid conduit has a restriction orifice (RO), an inlet control valve, and an outlet control valve. In addition, the plurality of fluid conduits has a control line and an exposed line. The control line is configured to be isolated from the fluid for a time period. The exposed line is configured to be exposed to the fluid for the time period. The system is configured to determine a contaminant concentration of the fluid at least in part using the operating parameter and the time period.