Downhole Sampling Carrier Injection in Return Mud Stream
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Solution Overview
Problem
Current methods for sampling formation fluids during well drilling operations require samples to be pumped back to the surface and then tested, which is inefficient and delays data analysis, and existing technologies struggle to extract samples directly from the formation for real-time analysis and decision-making.
Innovation Solution
A system that includes a formation testing tool mounted on a drill collar, which uses a sample carrier injected into the return mud stream to transport fluid samples to the surface, where a carrier extraction unit separates and identifies the samples, allowing for real-time data transmission and analysis using optical communication to avoid hazardous environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If samples are pumped back to the surface using conventional methods, then samples can be transported to the surface for testing, but the process is inefficient and delays data analysis
Solution Approach 1:
The system segments the sampling and data collection process by using separate sample carriers for fluid samples and data carriers for measurement data. Both are injected into the return mud stream independently, allowing parallel transport to the surface, which improves efficiency and reduces analysis time.
Solution Approach 2:
The return mud stream acts as an intermediary medium to transport both sample carriers and data carriers to the surface. This eliminates the need for separate pumping systems and utilizes the existing mud circulation infrastructure, improving productivity without additional time loss.
2Measurement precision
If samples are taken using wireline testers after drill string removal, then formation fluid samples can be obtained, but the process requires additional operations and delays decision-making
Solution Approach 1:
The system performs preliminary sampling action by collecting formation fluid samples and measurement data simultaneously during the drilling operation itself. Sample carriers are injected into the return mud stream at the bottom hole assembly, eliminating the need for subsequent wireline testing operations and enabling real-time decision-making.
Solution Approach 2:
The system merges sampling and data collection functions into a single integrated process at the bottom hole assembly. Both fluid samples and measurement data are collected and transported together through the return mud stream, improving productivity while maintaining measurement precision.
3Loss of information
If data is downloaded using low data rate electrical connections after tools are pulled out, then data can be retrieved, but the data rate is limited and analysis is delayed
Solution Approach 1:
The system replaces low-speed electrical connections with optical communication technology for data transmission. Optical carriers can be injected into the return mud stream and read at the surface, providing significantly higher data rates while ensuring complete data retrieval without the limitations of electrical cable bandwidth.
4Quantity of substance
If multiple samples are collected during drilling, then comprehensive formation data can be obtained, but sample management and identification become complex
Solution Approach 1:
The system uses fluorescent markers or color-coded identifiers on sample carriers to enable quick visual identification and sorting. This allows comprehensive sample collection while simplifying management, as carriers can be rapidly distinguished and organized based on their fluorescent or color characteristics without complex tracking systems.
Data Source
AI summary
An embodiment includes an apparatus that includes a sample carrier adapted to receive a sample and return it to the surface. An embodiment includes a formation tester adapted to load the sample carrier. An embodiment includes a retriever to remove the carrier from the drilling mud. The retriever also includes a device for removing the sample from the carrier.