Horizontal In-Situ Mining Wells With Electrokinetic Flow Control
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Solution Overview
Problem
In-situ mining using vertical wells faces challenges such as a large footprint, groundwater contamination risks, and the need for numerous wells, especially when electrokinetic assistance is required, making it difficult in populated areas.
Innovation Solution
Implementing horizontal wells alongside each other, with one well acting as an injector and the other as a producer, optionally with electrokinetic assistance, to dissolve and extract target materials efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If vertical wells are used for in-situ mining, then extraction can be achieved, but the footprint is large and well density is high
Solution Approach 1:
The patent transitions from vertical well orientation to horizontal well orientation, changing the spatial dimension of well placement. This allows wells to be positioned alongside each other at the same elevation, reducing the vertical footprint while maintaining extraction effectiveness through optimized horizontal spacing and electrokinetic field distribution.
2Productivity
If numerous vertical wells are deployed, then mining can proceed, but groundwater contamination risk increases
Solution Approach 1:
By switching to horizontal wells, the patent positions injection and production wells at the same elevation, creating a contained horizontal extraction zone. This prevents vertical migration of lixiviant into groundwater aquifers, eliminating contamination risk while maintaining mining productivity through electrokinetic-driven fluid flow.
Solution Approach 2:
The patent introduces electrokinetic fields as an intermediary mechanism to control fluid flow between wells. This electric field mediator enables precise control of lixiviant movement through the ore body, ensuring contained flow paths that prevent groundwater contamination while maintaining extraction efficiency.
3Productivity
If electrokinetic assistance is applied to vertical wells, then extraction efficiency improves, but well density requirements increase
Solution Approach 1:
The patent combines horizontal well orientation with electrokinetic assistance, where the horizontal configuration allows for more spacious well spacing. The electrokinetic fields can be effectively distributed over larger horizontal distances, reducing well density requirements while maintaining or enhancing extraction efficiency through optimized field geometry.
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
Reduces the footprint, minimizes groundwater contamination, and allows mining in populated areas by optimizing well placement and operation, enhancing extraction efficiency and reducing well density.
Implementation Method 1
inject the lixiviant into the permeable ground layer to dissolve a target material to form a solution containing the lixiviant and the target material
Implementation Method 2
electrokinetic assistance
Data Source
AI summary
Systems and methods for horizontal wells for in-situ mining are provided. A system for in-situ mining includes: an injection well including: a first vertical portion (VP) extending downward from a ground surface, the first VP receiving a lixiviant, and a first horizontal portion (HP) connected to the first VP and extending horizontally through the ground, the first HP receiving the lixiviant from the first VP, and injecting the lixiviant into the ground to dissolve a target material forming a solution, and a production well including: a second HP extending horizontally parallel to the first HP through the ground, the second HP receiving the solution from the first HP, and a second VP connected to the second HP and extending upward to the ground surface, the second VP: receiving the solution from the second HP, and pumping the solution to a processing plant to separate the target material from the lixiviant.