METHOD FOR CONSTRUCTING DOUBLE-DECK UNDERGROUND RESERVOIR IN ROCK SALT LAYER Russian patent published in 2024 - IPC B65G5/00 E21F17/16 E21B43/28 

FIELD: well drilling.

SUBSTANCE: construction of underground reservoirs created by underground dissolution through drill holes in rock salt layers separated by a layer of insoluble rocks. According to the invention, when implementing the method, a well is drilled to the bottom of the lower layer, external and internal suspended working pipe strings are installed in it, a non-solvent is pumped into the well and a production is created first in the lower, then in the upper layer. After creating the upper production, the working pipe strings are lifted and the pipe string is lowered into the well until it lands on a layer of insoluble rocks, and the pipes in the interval where the upper workings are pre-perforated. A pipe string with a downhole motor installed on it is lowered into the well until a layer of insoluble rocks is formed, the layer is drilled out and the pipe string is raised to the surface. Then a pipe string is lowered into the well to the bottom of the lower excavation in the design position, intended for collecting brine when filling the underground reservoir with the stored product.

EFFECT: increasing the efficiency of reservoir construction by simplifying the method and speeding up its creation.

1 cl, 3 dwg