Logging Tool Integrated With Casing String for Simultaneous Deployment
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Solution Overview
Problem
Drilling operations in unconventional reservoirs face increased costs due to the time required for wellbore logging, which delays the casing process and adds rig time, making it inefficient and costly.
Innovation Solution
A method and system where a logging tool is releasably fixed to the bottom of a casing string, allowing it to collect data as the casing is run into the wellbore, and then retrieved via wireline or coiled tubing, reducing the need for additional rig time and enabling simultaneous logging and casing deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate logging trips are conducted after drilling but before casing, then wellbore formation data can be collected, but rig time is significantly increased and operational efficiency is reduced
Solution Approach 1:
The patent combines the logging tool with the casing string into a single integrated assembly. The logging tool is positioned at the bottom of the casing string and powered by a battery, allowing logging operations to be performed simultaneously with casing deployment. This merging eliminates the need for separate logging trips, thereby collecting wellbore formation data while minimizing rig time.
2Loss of information
If logging is performed before casing is run, then formation data is obtained, but the casing process is delayed and additional rig time is required
Solution Approach 1:
The logging tool is pre-positioned at the bottom of the casing string before deployment, and the battery is pre-installed and charged. This preliminary preparation ensures that logging operations can commence immediately upon reaching the desired depth, without requiring separate setup time or delaying the casing process. The formation data is collected as a preliminary action integrated into the casing deployment sequence.
3Productivity
If a logging tool is permanently attached to the casing string, then logging operations can be performed during casing deployment, but the logging tool cannot be retrieved for reuse
Solution Approach 1:
The connection between the logging tool and casing string is designed to be dynamic rather than fixed. A release mechanism is incorporated that allows the logging tool to be detached from the casing string after deployment. This dynamic connection enables the logging tool to remain attached during casing deployment for simultaneous operations, yet can be released and retrieved afterward for potential reuse or analysis, providing flexibility in the system's operation.
Data Source
AI summary
A system including a casing string having one or more casing segments, a logging tool, and one or more float valves. The casing string can have a distal end and a proximal end with the logging tool detachably coupled with the distal end thereof. The one or more float valves can be coupled with a distal end of the logging tool. The logging tool can have a battery power source transitionable between a standby power mode and a full power mode. The casing string is operable to be disposed in a wellbore and transition the logging tool from the standby power mode to the full power mode upon placement within a predetermined portion of the wellbore.