Drill String Conveyance for In-Hole Formation Evaluation
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Solution Overview
Problem
Traditional formation evaluation operations are time-consuming and risk the toolstring getting stuck or lost in the wellbore.
Innovation Solution
A method of deploying an evaluation tool string into a drill string optimized for drilling and logging, allowing formation evaluation data acquisition during tripping out of the hole, with a communication system for data transmission to the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional formation evaluation operations are performed after the drill string is tripped out of the wellbore, then formation evaluation data can be obtained, but the operation time increases significantly
Solution Approach 1:
The formation evaluation tools are deployed into the drill string before the drilling operation is completed. The tools are positioned and ready to perform measurements while the drill string is still in the wellbore, eliminating the need to wait until after tripping out. This preliminary deployment allows data acquisition to occur during the drilling operation itself, significantly reducing total operation time.
Solution Approach 2:
The system enables continuous formation evaluation data acquisition during the drilling operation. As the drill string is tripped out, the evaluation tools continue to collect data without interruption, maintaining useful action throughout the entire process rather than stopping to perform separate evaluation operations after drilling completes.
2Measurement precision
If formation evaluation tool strings are deployed into a wellbore using traditional methods, then formation evaluation can be performed, but the tool strings are at risk of getting stuck or lost in hole
Solution Approach 1:
The formation evaluation tool string is deployed inside the drill string, nesting one tool string within another. The evaluation tools are conveyed through the hollow interior of the drill string to the measurement location, and the drill string itself serves as the conveyance mechanism and protective housing. This nested configuration eliminates the need for separate tool string deployment operations that are prone to getting stuck, as the tools are already positioned within the drill string structure.
Solution Approach 2:
The drill string acts as an intermediary medium that facilitates the deployment and positioning of the formation evaluation tools. Rather than deploying evaluation tools directly into the wellbore where they risk getting stuck, the drill string serves as an intermediate conveyance system that safely transports the tools to their operational position and maintains their secure placement throughout the drilling operation.
Data Source
AI summary
A method of obtain formation evaluation data that includes deploying an evaluation tool string into a drill string located in a wellbore. The method can also include landing the evaluation tool string in a portion of the drill string that is configured to optimize formation evaluation using the evaluation tool located therein.