METHOD FOR OIL-CONTAMINATED SOIL PURIFICATION USING HIGH-PRESSURE TECHNOLOGY Russian patent published in 2021 - IPC B09C1/02 E21B43/16 

FIELD: environmental protection.

SUBSTANCE: invention relates to the field of environmental protection and can be used to clean the soil from oil and oil products, as well as to eliminate the consequences of accidental spills. This method involves cleaning the soil to the entire depth of the spread of oil pollution. The essence of the invention lies in the cleaning of soil contaminated with oil products using the energy of a high-pressure jet of carbonated water and carbon dioxide. Cleaning of soil contaminated with oil products is carried out by injecting a solution into wells using high-pressure technology. The final well depth must be below the level of the oil-contaminated soil. Carbonated water acts as a solution for cleaning oil-contaminated soil. The injection of the solution into the oil-contaminated soil massif is carried out under high pressure using high-pressure technology, using the energy of a jet of carbonated water and carbon dioxide generated during the return stroke of the injection nozzle located at the lower end of the drill string. The solution is pumped into the oil-contaminated soil massif using high-pressure technology with the help of appropriate technical means. With the use of this high-pressure technology, as well as with the additional supply of carbon dioxide, the efficiency of soil cleaning increases as a result of the wide spread of the solution used in the soil pores. An integral part of the presented cleaning method is the device of pumping wells. After the supply and distribution of the solution in the massif, it is extracted using pre-drilled pumping wells.

EFFECT: invention provides a high degree of purification during the implementation of the method is achieved due to high injection pressure, wide predicted spread of the applied solution.

1 cl, 2 dwg