Downhole Chemical Reactor for Self-Sustaining Pressure Generation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional hydraulic and pneumatic power systems for downhole applications rely on surface-powered mechanical pumps, which are impractical for deep or challenging environments due to efficiency losses and maintenance challenges, limiting their viability in subsea formations.
Innovation Solution
A downhole chemical reactor that generates gas for pressure-on-demand or constant pressure reservoirs by reacting well fluids with contained reactants, using reactor control mechanisms to manage fluid flow and pressure, eliminating the need for surface-powered mechanical pumps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If surface-powered mechanical pumps are used for hydraulic or pneumatic power systems, then power transmission capability is improved, but system reliability and efficiency deteriorate due to long line distances, environmental damage risks, and maintenance challenges
Solution Approach 1:
The chemical reactor is designed to autonomously generate gas using well fluids as reactants, eliminating the need for external power sources. The system self-regulates through pressure-dependent valve mechanisms that automatically control fluid injection and gas generation without surface intervention, achieving self-service operation in remote downhole environments
Solution Approach 2:
The patent replaces mechanical pump-based power transmission systems with a chemical reaction-based gas generation system. Instead of using surface-powered mechanical pumps to transmit hydraulic or pneumatic power through long lines, the system uses chemical reactions between well fluids and reactants to directly generate pressurized gas at the downhole location
2Power
If surface-powered mechanical pumps are used, then initial power generation capability is improved, but operational sustainability deteriorates due to maintenance challenges and environmental vulnerability
Solution Approach 1:
The system continuously sustains operation by automatically drawing well fluids from the surrounding environment, converting them to gas through chemical reactions, and maintaining pressure in the accumulator. The self-regulating valve system ensures continuous operation without surface maintenance by automatically controlling reactant injection based on pressure conditions
Solution Approach 2:
The system changes the operational parameters from surface-powered mechanical operation to downhole chemical reaction-based operation. By utilizing well fluids at downhole conditions (temperature, pressure, composition) as reactants, the system adapts to the local environment and achieves sustained operation without surface support
3Length of moving object
If hydraulic or pneumatic lines are extended to reach deep boreholes, then power transmission reach is improved, but system vulnerability to damage increases
Solution Approach 1:
The patent extracts the power generation function from the surface and relocates it to the downhole environment. By removing the need for surface-powered pumps and extended hydraulic/pneumatic lines, the system eliminates the vulnerable transmission medium and generates power directly at the point of use using well fluids and chemical reactants
Solution Approach 2:
The chemical reactor acts as an intermediary device that converts well fluids into pressurized gas. This intermediary chemical reaction process eliminates the need for direct mechanical power transmission through vulnerable lines, using the well fluids themselves as both the energy source and the working medium
Data Source
AI summary
A downhole chemical reactor can be placed in a downhole environment to generate gas in-situ. This gas can pressurize an inner pressure chamber of the downhole chemical reactor to create a pressure-on-demand source or to maintain a constant pressure reservoir, depending on the configuration of a reactor controller coupled to an inlet of the inner pressure chamber. The inner pressure chamber contains one or more desired chemical reactants and the reactor controller operates to permit well fluid to flow from the wellbore and into the inner pressure chamber. The well fluid reacts with the desired chemical reactants and generates one or more gases such as hydrogen or carbon dioxide. The generated gases pressurize the inner pressure chamber and a pressure regulator coupled to the inner pressure chamber maintains a maximum pressurization of the inner pressure chamber. For a constant pressure reservoir, the reactor controller repeats this cycle indefinitely.