Multi-Cable Wireline Guide for Simultaneous Wellbore Logging
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Solution Overview
Problem
Conventional well-logging systems are limited to deploying a single downhole tool at a time, restricting data acquisition to a single location within the wellbore, which hinders simultaneous measurement of wellbore properties at multiple locations.
Innovation Solution
A multi-cable well-logging system with a cable guide that enables independent traversal of multiple downhole tools through the wellbore by using a sleeve and chassis structure to manage cables, preventing entanglement and allowing concurrent data acquisition at multiple locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single downhole tool is deployed, then the system is simple to operate, but data acquisition is limited to a single location
Solution Approach 1:
The system segments the data acquisition function by deploying multiple independent downhole tools (first downhole tool, second downhole tool) that can operate simultaneously at different locations within the wellbore, allowing parallel data collection while maintaining individual tool simplicity
Solution Approach 2:
The cable guide acts as an intermediary component that manages the interaction between multiple cables and downhole tools. It provides a structured framework (chassis structure with sleeves) that enables multiple tools to coexist and operate independently without direct interference, resolving the complexity of multi-tool deployment
2Productivity
If multiple downhole tools are deployed simultaneously, then data acquisition at multiple locations is enabled, but cable entanglement occurs
Solution Approach 1:
The cable guide divides the cable management function into separate segments using individual sleeves for each cable. Each sleeve independently guides its associated cable and downhole tool, preventing cables from interfering with each other while enabling simultaneous operation of multiple tools
Solution Approach 2:
The cable guide employs a nested structure where sleeves are disposed within the chassis structure, and cables translate along within the sleeves. This nested arrangement organizes multiple cables in a hierarchical manner, maintaining their independence while containing them within a unified management framework
3Reliability
If a cable guide with sleeve and chassis structure is used, then cable entanglement is prevented, but device complexity increases
Solution Approach 1:
The cable guide chassis structure serves multiple functions simultaneously: it provides structural support, houses the sleeves, couples downhole tools to cables, and prevents cable entanglement. This multi-functionality reduces the need for separate components, thereby limiting the increase in overall device complexity
Data Source
AI summary
A well-logging system includes a first downhole tool coupled to a first cable for conveying the first downhole tool along a wellbore. A second downhole tool having a housing is coupled to a second cable for conveying the second downhole tool along the wellbore. The well-logging system includes a cable guide having a chassis structure coupled to the housing and a sleeve coupled to the chassis structure and disposed about the first cable. The first cable is configured to translate along the sleeve such that the sleeve facilitates guided movement of the first downhole tool relative to the second downhole tool.