METHOD AND DEVICE FOR UNDERGROUND RESERVOIR FORMING IN ROCK SALT Russian patent published in 2005 - IPC

FIELD: mining, particularly for building underground reservoirs adapted for liquid and gaseous product storage and for brine extraction through wells.

SUBSTANCE: method involves mounting coaxial outer and central suspension pipe strings with installing central pipe string bottom at underground reservoir bottom; sealing well head; supplying solvent into underground reservoir to be formed through outer suspended pipe string and displacing the resultant brine to ground surface through central pipe string. Channel for brine movement to bottom of central pipe string is formed above insoluble rock deposit present in underground reservoir between lower ends of outer and central pipe strings. Before salt dissolving process shutdown or in the case of oversized insoluble rock ingress in central pipe string bottom solvent is supplied to underground reservoir through central pipe string and brine is displaced through outer one.

EFFECT: facilitated dissolving system actuation, increased operational capabilities and prevention of bridge forming.

2 cl, 1 dwg, 1 ex