Downhole Electro-Hydraulic Valve Control With Position Feedback
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Solution Overview
Problem
Traditional methods for actuating downhole packers and well tools in well applications are often complex, relying on mechanical mechanisms or pressure actuation, which can be inefficient and lack precise control over fluid flows.
Innovation Solution
An electronic control system is employed to manage a downhole electro-hydraulically actuated valve system, utilizing sensors and control algorithms to monitor and adjust valve position, incorporating redundancy and a backup mechanism for reliable operation under harsh conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional mechanical mechanisms or pressure actuation are used to actuate downhole packers and well tools, then the system structure is simple, but the control precision over fluid flows is poor and efficiency is low
Solution Approach 1:
The patent replaces traditional mechanical actuation mechanisms with an electronic control system that uses electrical signals to actuate the downhole valve. The valve controller receives electrical signals from the surface, processes them, and controls the valve actuator to achieve precise fluid flow control without complex mechanical linkages from the surface.
Solution Approach 2:
The patent employs a hydraulic actuator system where electrical signals from the valve controller are converted to hydraulic motion to actuate the valve. This electro-hydraulic conversion enables precise control of fluid flows while maintaining reliability in the harsh downhole environment.
2Productivity
If traditional pressure actuation methods are used, then the device structure is simple, but energy consumption is high and control efficiency is low
Solution Approach 1:
The electronic control system transmits actuation signals periodically or on-demand from the surface rather than requiring continuous pressure application. The valve controller processes these periodic signals and actuates the valve only when needed, significantly reducing energy consumption compared to continuous pressure actuation.
Solution Approach 2:
The system changes the actuation parameter from continuous pressure to discrete electrical signals. This parameter change enables more efficient energy utilization because electrical signals can be transmitted with minimal energy and only when actuation is required, rather than maintaining constant pressure.
3Reliability
If electronic control system with sensors and control algorithms is implemented, then control precision and efficiency are improved, but device complexity increases
Solution Approach 1:
The patent incorporates sensors that provide feedback to the valve controller about valve position, fluid flow status, and system conditions. This feedback loop enables the controller to adjust actuation signals in real-time, improving reliability and ensuring accurate valve positioning even in the harsh downhole environment.
Solution Approach 2:
The electronic control system includes backup and redundancy mechanisms programmed in advance to handle potential failures. The controller can detect sensor failures or actuator issues and switch to backup modes or alternative actuation sequences, ensuring continuous reliable operation despite the added system complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise and efficient control over fluid flows for downhole tool actuation, reducing energy consumption and ensuring robust operation even in the presence of sensor failures.
Implementation Method 1
The technique utilizes an electronic control system for controlling actuation of a valve downhole. The valve, in turn, is operated to enable selective control over fluid flows governing the actuation of a downhole tool
Data Source
AI summary
A technique facilitates control over a downhole well operation. The technique utilizes an electronic control system for controlling actuation of a valve downhole. The valve, in turn, is operated to enable selective control over fluid flows governing the actuation of a downhole tool and/or other downhole operations. In some embodiments, the electronic control system may work in cooperation with a downhole hydraulic system to provide a downhole electro-hydraulically actuated valve system. A monitoring system provides feedback regarding the valve position and/or status of the downhole operation.