Valve Shift Detection Using Release Washer and Resistors
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Solution Overview
Problem
Current downhole tools face challenges in accurately detecting the actuation of valves used for fluid sampling in wellbore operations, which is crucial for efficient formation evaluation and sample collection.
Innovation Solution
A valve shift detection system employing a release washer with an activation wire and resistors to securely hold the washer in a contracted state and detect its expansion, allowing the spool to move from an un-actuated to an actuated position, and a second resistor to confirm successful actuation through voltage changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wire is used to secure the valve in the un-actuated position, then the valve can be reliably held in place, but it becomes difficult to detect whether the valve has actuated
Solution Approach 1:
A release washer is introduced as an intermediary component between the wire and the valve spool. The release washer translates the wire's constrained state into a detectable mechanical configuration change when it releases, allowing indirect detection of valve actuation without compromising the wire's reliable holding function
Solution Approach 2:
The patent replaces pure mechanical detection methods with an electrical detection system using resistors. The electrical circuit monitors resistance changes that occur when the release washer moves, substituting complex mechanical position sensors with simpler electrical measurement
2Measurement precision
If a release washer with multiple segments is used to detect valve actuation, then detection accuracy is improved, but the device complexity increases
Solution Approach 1:
The release washer is divided into multiple segments that can move independently. This segmentation allows each segment to respond to specific aspects of valve actuation, improving detection precision while maintaining a modular structure that is easier to manufacture and assemble
Solution Approach 2:
The release washer serves multiple functions: it acts as a mechanical constraint when contracted, a detection element when expanding, and a signal generator for the electrical circuit. This multi-functionality reduces the need for separate components, thereby reducing overall device complexity despite the segmented structure
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 detection of valve actuation, ensuring accurate fluid sampling and sample chamber sealing, enhancing the reliability of downhole operations by confirming successful valve shifts and preventing operational errors.
Implementation Method 1
a first resistor electrically coupled with the wire and designed to release the wire to actuate the valve
Implementation Method 2
a second resistor electrically coupled with the wire to detect connection of the first component with the second component
Data Source
AI summary
The present disclosure relates to a valve system that includes a valve having a spool moveable from an un-actuated position to an actuated position in response to actuation of the valve. The valve system also includes a wire to secure the valve in the un-actuated position, a first resistor electrically coupled with the wire and configured to release the wire to actuate the valve and move a first component coupled to the wire toward a second component, and a second resistor electrically coupled with the wire to detect connection of the first component with the second component.