Subterranean cavity chimney development for connecting solution mined cavities
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United States of America Patent
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Sep 22, 1981
Grant Date -
N/A
app pub date -
Aug 3, 1979
filing date -
Aug 3, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed is a method of connecting two or more subterranean cavities in a deposit having a potassium chloride-rich stratum which contains sodium chloride and which is disposed above a potassium chloride-lean, sodium chloride-rich stratum. The method comprises drilling at least two adjacent wells into the sodium chloride-rich stratum, establishing a chimney filled with insulating fluid at the bottom of at least one of the wells, extracting ore from the potassium chloride-lean stratum with solvent, raising the roof of the cavities by incrementally raising the insulating fluid level and allowing the cavities to grow laterally until the cavities connect.
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