Downhole Cable Tension Control via Real-Time Feedback
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Solution Overview
Problem
Current systems for managing drill string tension during wireline operations in geologic environments lack real-time feedback and adaptive control, leading to inefficiencies and risks such as unintentional pulloffs and equipment damage.
Innovation Solution
A computing system that integrates real-time tension monitoring with predictive modeling and automated winch control, using sensors and algorithms to adjust tension limits and prevent excessive tension, thereby ensuring safe and efficient conveyance of equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If real-time tension monitoring and automated control systems are implemented, then reliability and safety are improved, but device complexity increases
Solution Approach 1:
The system continuously monitors cable tension using load cells and compares actual tension values against predicted tension values from a physics-based model. This real-time feedback enables the automated control system to detect deviations and trigger alerts or shutdowns, directly improving operational reliability while maintaining controlled system complexity through structured feedback loops
Solution Approach 2:
The patent replaces manual mechanical tension monitoring and control with an automated electronic control system that uses sensors, processors, and algorithms. This substitution improves reliability by eliminating human error while managing complexity through modular system architecture consisting of distinct sensing, processing, and control components
2Productivity
If manual tension monitoring and control are used, then device complexity is reduced, but productivity and operational efficiency deteriorate
Solution Approach 1:
The system performs self-monitoring and self-regulation of cable tension through automated sensing, comparison against predictive models, and autonomous control actions. This self-service capability improves productivity by eliminating manual intervention requirements while managing complexity through standardized automated control algorithms and pre-configured safety parameters
3Duration of action of stationary object
If real-time feedback and adaptive control are implemented, then equipment life is extended, but loss of time for setup and configuration increases
Solution Approach 1:
The system uses a predictive tension model that is pre-configured with cable specifications, equipment parameters, and environmental factors before operations begin. This preliminary configuration enables real-time adaptive control without requiring complex setup during operations, extending equipment life through proper tension management while minimizing setup time through pre-computed reference values
Data Source
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AI summary
A method can include receiving information associated with a conveyance of equipment in a borehole via a cable; determining cable tension values based at least in part on a model and at least a portion of the information; conveying the equipment in the borehole via the cable; acquiring a cable tension value via one or more sensors; comparing the acquired cable tension value to at least one of the determined cable tension values; and, based at least in part on the comparing, setting a cable tension limit for further conveying of the equipment in the borehole via the cable