Downhole Valve Rotational Sensing for Leak-Proof Flow Control
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Solution Overview
Problem
Existing downhole valves in wellbores lack precise position sensing capabilities, leading to potential flow restrictions or leaks due to incomplete opening or closing, which can affect production efficiency and safety.
Innovation Solution
A flow control system with a downhole valve and a rotational sensor that determines the precise rotational position of the valve closure, using electromagnetic or proximity sensors to detect features on the valve components, ensuring full opening or closing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional downhole valves are used without position sensing, then the device complexity is reduced, but the reliability of flow control deteriorates due to inability to confirm full opening or closing
Solution Approach 1:
The patent replaces complex mechanical position indication mechanisms with electromagnetic sensing. A magnetic sensor detects the position of a magnet attached to the valve closure, eliminating the need for mechanical linkages or visual indicators while providing reliable electronic position confirmation.
Solution Approach 2:
The patent introduces a magnet as an intermediary element between the valve closure and the magnetic sensor. This magnet serves as a mediator that transfers position information from the moving valve closure to the stationary sensor, enabling non-contact position detection and improving reliability without adding mechanical complexity.
2Measurement precision
If rotational position sensing is added to the downhole valve, then the measurement precision of valve position is improved, but the device complexity increases
Solution Approach 1:
The patent uses electromagnetic sensing instead of mechanical position measurement mechanisms. The magnetic sensor electronically detects the rotational position of the valve closure through magnetic field interaction, providing precise measurement without mechanical contact or complex measurement linkages.
Solution Approach 2:
The patent detects valve position by monitoring changes in magnetic field parameters (strength, direction, or presence) rather than mechanical dimensions. The magnetic sensor measures variations in magnetic field characteristics as the magnet moves with the valve closure, translating physical position into electrical signals for precise measurement.
3Ease of operation
If magnetic sensors are used to detect valve closure position, then the ease of operation is improved through automated position detection, but the manufacturing precision requirements increase
Solution Approach 1:
The magnetic field-based detection system is inherently tolerant of manufacturing variations. The magnet and magnetic sensor automatically establish their operational relationship through magnetic field interaction without requiring precise mechanical alignment or calibration procedures, enabling easy operation despite manufacturing tolerances.
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
Ensures complete opening for unobstructed flow and complete closure for leak-proof operation, enhancing production efficiency and safety by accurately monitoring valve positions.
Implementation Method 1
A rotational sensor may be utilized to generate a signal responsive to the rotational position of the valve closure
Implementation Method 2
using electromagnetic or proximity sensors to detect features on the valve components
Data Source
AI summary
A flow control system for a well may include a valve body sized to fit in a wellbore and defining a valve body through bore. A valve closure is movably coupled to the valve body and moveable about a rotational axis between an open position allowing flow through the valve body through bore and a closed position closing flow through the valve body through bore. A rotational sensor generates a signal responsive to a rotational position of the valve closure relative to the valve body.