Single-Line Well Tool Control Using a Bidirectional Pressure Valve
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Solution Overview
Problem
Existing well tool control systems require multiple control lines and electrical components, which are costly, difficult to install, and not conducive to fluctuating downhole conditions, limiting their efficiency and reliability.
Innovation Solution
A single-line fluid-based control system using a bidirectional valve and resettable chamber, operated by pressure changes, that switches well tool settings without the need for additional control lines or electrical components, allowing for efficient and reliable operation at lower pressure levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple control lines and electrical components are used to control well tools, then the control system can achieve precise control, but the installation complexity and cost increase significantly
Solution Approach 1:
The patent combines multiple control functions into a single control line by using a bidirectional valve that can direct fluid flow in different directions based on pressure changes. This single control line replaces what would traditionally require multiple separate control lines and electrical components, thereby reducing installation complexity while maintaining control precision through the valve's ability to switch between different control modes.
Solution Approach 2:
The bidirectional valve serves multiple functions: it acts as a control element, a flow director, and a switching mechanism all within a single component. This multi-functional design eliminates the need for separate electrical components and multiple control lines, reducing the overall system complexity while achieving the same control objectives through a unified mechanical-f Fluid-based system.
2Adaptability or versatility
If electrical components are used in well tool control systems, then control functionality is enhanced, but the system becomes less reliable in fluctuating downhole conditions
Solution Approach 1:
The patent replaces electrical control components with a fluid-based mechanical control system. The bidirectional valve uses pressure-driven fluid flow to achieve control functions that would traditionally require electrical components. This substitution enhances reliability in downhole conditions because the fluid-based system is inherently more resistant to the fluctuating temperature, pressure, and electromagnetic interference conditions found in downhole environments, while still providing versatile control functionality through the valve's bidirectional capabilities.
3Adaptability or versatility
If traditional multi-line control systems are installed, then comprehensive control is achieved, but installation time and cost increase
Solution Approach 1:
The patent merges multiple control lines into a single control line that uses a bidirectional valve to achieve comprehensive control. Instead of installing multiple separate control lines, the single control line with the bidirectional valve can direct fluid flow to different ports based on pressure changes, providing the same comprehensive control functionality with reduced installation time and lower material costs.
Solution Approach 2:
The patent uses a fluid-based control system where pressure changes in a single control line actuate the bidirectional valve to achieve comprehensive control of well tool settings. This hydraulic/pneumatic approach eliminates the need for multiple physical control lines, significantly reducing installation time and complexity while maintaining the ability to provide comprehensive control through the valve's multiple ports and bidirectional flow 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
The system effectively switches well tool settings using a single control line, reducing installation complexity and costs, and operating reliably in challenging downhole conditions without electrical components, enhancing operational efficiency and cost-effectiveness.
Implementation Method 1
A control unit at the surface of the wellbore can apply pressure to the control line, which can cause the control system to switch the well tool from one setting to another setting
Implementation Method 2
The fluid can push the piston in the well tool from an initial position to a new position, changing the setting of the well tool
Data Source
AI summary
A control system can include a resettable chamber and a bidirectional valve. The bidirectional valve can be switchable between (i) a first configuration for enabling fluid flow from the control line into a first port of a well tool and from a second port of the well tool into the resettable chamber, and (ii) a second configuration for enabling fluid flow from the control line into the second port of the well tool and from the first port of the well tool into the resettable chamber. The bidirectional valve can be switched from the first configuration to the second configuration in response to pressure being applied to the control line.