Multi-mode Actuator Control Module for Well Applications
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Solution Overview
Problem
Hydraulic actuators in well applications face limitations in versatility and efficiency due to their operation being restricted to specific modes, lacking flexibility in environments and applications, and often require complex control systems for multiplexing and mode selection.
Innovation Solution
The introduction of an operating module that can operate in multiple modes (electro-hydraulic, pure hydraulic, and mechanical) by utilizing an electro-hydraulic circuit with solenoid valves and shuttle/check valves, allowing for remote operation and flexible configuration to adapt to various environments and applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If hydraulic actuators operate in specific restricted modes, then system simplicity is maintained, but versatility and adaptability are reduced
Solution Approach 1:
The operating module is designed to perform multiple functions by supporting three distinct modes of operation (electro-hydraulic mode with solenoid valves, pure hydraulic mode with shuttle/check valves, and mechanical mode with direct hydraulic connection). This multi-functionality allows a single device to adapt to various applications and environments without requiring separate specialized actuators for each mode.
Solution Approach 2:
The system dynamically switches between different operational modes based on application requirements. The electro-hydraulic circuit can transition from solenoid-valve-controlled operation to shuttle-valve-controlled operation to direct mechanical operation, allowing the actuator to adapt its control mechanism in real-time to optimize performance for different task requirements.
2Adaptability or versatility
If multiple control lines are used for multiplexing and mode selection, then operational flexibility is improved, but system complexity and installation difficulty increase
Solution Approach 1:
The patent merges multiple control functions into a single integrated operating module. The electro-hydraulic circuit combines solenoid valves, shuttle valves, and check valves into one unified assembly that handles mode selection, multiplexing, and actuation control through a single hydraulic connection point, eliminating the need for separate control lines for each function.
Solution Approach 2:
The shuttle valve and check valve assembly acts as an intermediary mechanism that simplifies control line requirements. By using the shuttle valve to automatically route hydraulic flow based on solenoid valve actuation, the system reduces the number of independent control lines needed while maintaining the ability to perform multiple operations.
3Extent of automation
If solenoid valves are used for electro-hydraulic control, then remote operation capability is improved, but susceptibility to hydraulic lock increases
Solution Approach 1:
The system incorporates check valves and shuttle valves as protective mechanisms that prevent hydraulic lock before it can occur. The check valves maintain one-way flow control to prevent pressure buildup, while the shuttle valve provides an alternative flow path that relieves pressure if the solenoid valves become stuck or fail, thereby cushioning against the harmful effect of hydraulic lock.
Solution Approach 2:
The shuttle valve serves as an intermediary safety mechanism between the solenoid valves and the actuator. When solenoid valves experience failure or hydraulic lock conditions, the shuttle valve automatically redirects hydraulic flow through check valves to equalize pressure and prevent complete system lockup, ensuring continued operational capability.
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 flexible and efficient actuation of devices in well and non-well applications by allowing selection of primary, secondary, and tertiary modes of operation, reducing system hydraulic lock and enabling multiplexing with fewer control lines, thus enhancing operational flexibility and reliability.
Implementation Method 1
an electro-hydraulic circuit with solenoid valves
Implementation Method 2
shuttle/check valves
Implementation Method 3
Hydraulic fluid is supplied to the downhole actuator under pressure and used to actuate the hydraulic actuator
Data Source
AI summary
A technique facilitates operation of an actuator via an operating module. The actuator and the operating module are constructed to enable operation in a wide variety of environments and applications. The operating module is coupled to the actuator and is operable in a plurality of modes, such as an electro-hydraulic mode, a pure hydraulic mode, and a mechanical mode. A desired mode of operation is selected and the operating module enables shifting of the actuator via the selected mode.