SOLUTION MINING UNDER AN INERT GAS
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United States of America Patent
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Issued Date -
May 19, 2016
app pub date -
Jun 29, 2015
filing date -
Jun 29, 2015
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Abstract
This method includes providing an cased borehole located within a salt bed, injecting an aqueous liquid into the cased borehole at a first pressure, in order to expose the salt bed to the aqueous liquid, thereby dissolving at least a portion of the salt bed and forming a brine solution within an underground storage volume, withdrawing at least a portion of the brine solution from the underground storage volume, and injecting an inert gas into the cased borehole at a second pressure, in order to provide an inert blanket within the underground storage volume, wherein the second pressure is greater than the first pressure but less than the maximum allowable pressure of the cavern.
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