Safety Valve Actuator with Safe Mode Indicator
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Solution Overview
Problem
Current valve actuators lack a visual indication of the actuation mechanism and position status, leading to potential misinterpretation of safe mode operation, which can result in valve mispositioning and uneven wear, causing leakage and operational inefficiencies in the petroleum industry.
Innovation Solution
A valve system incorporating a mechanical override and a safe mode indicator that provides visual signals to distinguish between automatic and manual actuation, ensuring the valve operates in a safe mode by indicating whether the fail-safe mechanism is engaged and if the mechanical override is interfering with it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mechanical override is added to provide additional opening/closing power, then the valve can be actuated manually during wellbore completion operations, but the system fails to provide visual indication of which actuation mechanism is being used
Solution Approach 1:
The patent employs color-coded visual indicators (such as colored bands or markers on the shaft) to distinguish between automatic and manual actuation modes. The indicator changes color or displays different colors based on which actuation mechanism is currently engaged, providing immediate visual feedback to operators about the valve's actuation status.
Solution Approach 2:
The patent introduces an intermediary indicator mechanism that mediates between the dual actuation systems (automatic and manual). This indicator serves as a communication bridge, translating the internal state of the actuation mechanism into visible external signals that inform operators about the current operating mode.
2Loss of information
If the shaft extension is used as visual indication of valve position, then the valve position can be observed, but the indication does not communicate which actuation mechanism is being used or whether the valve is fully open/closed
Solution Approach 1:
The patent enhances the visual indication system by incorporating color-coded markers or bands on the shaft that change position or color to indicate not only the valve position (open/closed) but also the actuation mechanism being used. This provides precise visual feedback about both position and operational mode simultaneously.
Solution Approach 2:
The patent adds another dimension to the visual indication by incorporating angular or rotational positioning of indicators, not just linear shaft extension. This allows the system to communicate multiple pieces of information (position, actuation mode, completeness of operation) through the spatial arrangement and orientation of visual markers.
3Reliability
If the mechanical override is used to lock the valve in open position, then the valve remains open during wellbore completion operations, but the operator may mistakenly believe the valve is operating in safe mode when it is not
Solution Approach 1:
The patent uses distinct color indicators to clearly differentiate between safe mode operation and mechanical override operation. When the mechanical override is engaged to lock the valve in the open position, a specific color or color combination is displayed that is distinctly different from the safe mode indicator, preventing operator misinterpretation of the valve's operational state.
Solution Approach 2:
The patent implements immediate visual feedback through the indicator system that continuously communicates the valve's operational mode to the operator. This feedback mechanism ensures operators are always aware of whether the valve is in safe mode or mechanically locked, eliminating the possibility of mistaken beliefs about the valve's operational state.
Data Source
AI summary
Embodiments of a method of operating a safety valve and a safety valve system are provided. The valve system includes a valve, an actuator, a mechanical override, and an indicator. The actuator includes a fail-safe mechanism and the indicator is configured to indicate whether the fail-safe mechanism is operable during use of at least one of the actuator and the mechanical override. In one embodiment, a method of operating the safety valve includes actuating the valve into an open position and sending a signal to indicate that the fail-safe mechanism is operable to move the valve to the closed position, while the valve is in the open position.