Mining or in situ disintegration of hard material – In situ conversion of solid to fluid – Input and output wells
Patent
1978-12-06
1980-11-18
Pate, III, William F.
Mining or in situ disintegration of hard material
In situ conversion of solid to fluid
Input and output wells
E21B 4328
Patent
active
042342317
ABSTRACT:
A method for restoring a formation which has undergone an in situ leaching operation wherein minerals oxidized during the leach operation pose a contamination threat to the formation water. In the present invention, the formation is flushed with a restoration fluid which contains a reducing agent capable of reducing the oxidized minerals to their reduced, insoluble state so that they are redeposited into the formation. Examples of suitable reducing agents are hydrogen gas, hydrogen sulfide, sulfur dioxide, carbon monoxide, and ferrous iron solutions.
REFERENCES:
patent: 4108922 (1978-08-01), Stover
patent: 4155982 (1979-05-01), Hunlin et al.
Faulconer Drude
Huggett C. A.
Mobil Oil Corporation
Pate III William F.
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