Downhole Membrane Rupture Using Electrical Heating
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Solution Overview
Problem
Conventional downhole tools in the oil and gas industry face limitations due to pressure-activated technologies, which are restricted by specific pressure windows and require complex, costly, and large power supplies for electrically activated systems, making them unsuitable for single-cycle tools and limiting their application in varied pressure environments.
Innovation Solution
A downhole tool apparatus using a membrane that is weakened or ruptured by electrical energy rather than pressure, allowing for fluid communication and enabling hydraulic functions without relying on specific pressure differentials, featuring a heating element to soften or melt the membrane and a robust, cost-effective design with fewer moving parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pressure activated rupture discs are used to control downhole tools, then the tools can be activated at specific pressure thresholds, but the system is limited to operating within particular pressure windows and cannot function below the threshold bursting pressure
Solution Approach 1:
The patent replaces the purely mechanical pressure-activated rupture disc system with an electrically controllable heating element system. The heating element can be activated electrically to weaken and rupture the membrane at predetermined locations, allowing the tool to function independently of specific pressure differentials while maintaining reliable activation through electrical control signals.
Solution Approach 2:
The invention changes the activation parameter from pressure differential to electrical heating. By applying electrical energy to heat the membrane to its melting or softening point, the system achieves membrane rupture without relying on pressure thresholds, thereby expanding adaptability across different pressure environments while maintaining activation reliability through controlled electrical parameters.
2Ease of operation
If electrically activated downhole tools with solenoids or pilot valves are used, then the tools can be controlled remotely, but the power supplies required are of significant size, cost and technical complexity
Solution Approach 1:
The patent extracts and eliminates the complex power supply systems (solenoids, pilot valves, large batteries) from the downhole tool. Instead, it uses a simple heating element that requires minimal power to weaken and rupture the membrane, thereby achieving remote control capability through simple electrical signaling while dramatically reducing device complexity and power supply requirements.
Solution Approach 2:
The invention employs a disposable or single-use membrane that is weakened and ruptured by a simple heating element. The membrane serves its isolation function until electrically activated to rupture, at which point it is discarded. This approach eliminates the need for complex, reusable power supply systems while maintaining ease of remote operation.
3Power
If pressure activated rupture discs are used, then the system can release built up pressure, but multiple tools cannot be accommodated due to limited pressure operating window
Solution Approach 1:
The patent creates a universal activation system where multiple downhole tools can be independently controlled by electrical signals. Each tool can have its own membrane rupture mechanism activated electrically, allowing multiple tools to be accommodated in the same drill string without being constrained by a limited pressure operating window, as each tool can be activated independently through electrical control.
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 operation in a wide range of pressure environments, reduces complexity and cost, and enhances reliability by eliminating dependence on specific pressure windows and large power supplies, while maintaining hydraulic functionality.
Implementation Method 1
an electrical element configured to conduct an electrical current. The electrical element is positioned with respect to the membrane such that energy generated by the electrical current passing through the electrical element is incident on the membrane
Implementation Method 2
The membrane is configured to be weakened and/or ruptured when the energy is incident thereon
Data Source
AI summary
An apparatus for use in a downhole tool is provided. The apparatus includes a membrane configured to isolate an internal environment of the downhole tool from one or more further environments, internal and/or external to the downhole tool; and an electrical element configured to conduct an electrical current. The electrical element is positioned with respect to the membrane such that energy generated by the electrical current passing through the electrical element is incident on the membrane. The membrane is configured to be weakened and/or ruptured when the energy is incident thereon to allow fluid communication between the internal environment and the further environment.