METHOD OF CONSTRUCTION OF TANKS IN LIMITED-THICKNESS ROCKS SALT FORMATIONS Russian patent published in 2003 - IPC

FIELD: oil producing, gas, chemical industries. SUBSTANCE: invention relates to construction of underground tanks through rock salt wells by dissolving of salt and it can be used for producing of salt in limited thickness formations. According to proposed method, directional well is drilled with its outlet into horizontal position near foot of salt formation, mounting of casing string and processing tubing is carried out with arrangement of processing tubing shoe at well bottom, solvent is delivered and brine is pumped out to daylight surface with alternating straight-flow and opposite flow modes of delivery of solvent and pumping out of brine. Shoe of casing string is installed over roof of formation, additional processing tubing is lowered into well whose shoe is installed at end of slanted section of well close to foot of salt formation to suck out more concentrated brine, and liquid or gaseous non-solvent is delivered into casing string. Invention it possible to construct underground storage in rock salt of limited formation thickness through one well. EFFECT: improved efficiency of salt producing. 2 cl, 1 ex, 32 dwg