Gas Analysis System with Fluidic Management for Rapid Chromatography
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current gas chromatography methods for analyzing hydrocarbon gases in the petroleum industry are limited by slow chromatographic cycle times, which hinder fast and efficient analysis of light alkanes, essential for rapid drilling operations and accurate hydrocarbon potential evaluation.
Innovation Solution
A fluidic management system that independently manages precut backflushing and main column separation, allowing for simultaneous operations and significantly reducing cycle times by enabling the analysis of light alkanes in under 30 seconds, using a gas analysis system with a multi-port valve and flow regulators to manage carrier gas flow between precut and main columns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If standard chromatographic cycling method is used, then separation and analysis of gas samples can be performed, but cycle time is too long (above 30 seconds) for rapid drilling operations
Solution Approach 1:
The chromatographic system is divided into two independent columns: a precut column for preliminary separation and a main column for final separation. The precut column handles initial gas sample separation while the main column performs detailed analysis, allowing parallel processing and significantly reduced cycle times below 30 seconds.
Solution Approach 2:
The precut column performs preliminary separation of gas components before they enter the main column. This preliminary action prepares the sample in advance, allowing the main column to focus only on final separation, thereby reducing the overall analysis time while maintaining accuracy.
2Reliability
If precut column backflushing is performed sequentially after main column separation, then column contamination is removed, but total cycle time increases
Solution Approach 1:
The backflushing of the precut column is performed continuously and simultaneously with the main column separation process, rather than sequentially. This continuous action ensures column cleanliness is maintained without adding to the overall cycle time, as both operations occur in parallel.
Solution Approach 2:
The system adds a temporal dimension to column maintenance by performing backflushing in parallel with the analysis process. Instead of adding backflushing as a sequential step, it is integrated into the same time frame as the main column separation, effectively utilizing overlapping time intervals.
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
This approach enables rapid compositional analysis of gas samples, reducing cycle times and improving vertical resolution of gas measurements, facilitating faster decision-making in drilling operations and enhancing the identification of hydrocarbon potential.
Implementation Method 1
a precut column for separating compounds of interest from compounds of no interest
Implementation Method 2
a main column for separating each compound of interest
Implementation Method 3
a carrier gas supply... The carrier gas is able to flow in the precut column in both directions
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A gas analysis system 110 has a sample loop for forming a gas sample, a precut column 118 for separating compounds of interest from compounds of no interest, having an inlet fluidly connected to the sample loop, and a main column 120 for separating each compound of interest, having an inlet fluidly connected to an outlet of the precut column 118. The gas analysis system also comprises a fluidic management system including a carrier gas supply 114 and valves 122,124,126. The carrier gas is able to flow in the precut column 118 in both directions, and the fluidic management includes a first line fluidly connecting the carrier gas supply 114 to the outlet of the precut column 118 and a second line connecting the carrier gas supply to the inlet of the main column 120. The valves are disposed in the first and second lines and enable or disable the fluid connection between the carrier gas supply 114 and the inlet of the main column 120 and the carrier gas supply and the outlet of the precut column 118.