METHOD OF TERMINATION OR, AT LEAST, REDUCTION OF UNCONTROLLED RELEASE OF HYDROCARBONS, BLOWOUT FROM HYDROCARBONS EXTRACTION BOREHOLE Russian patent published in 2017 - IPC E21B33/138 C09K8/42 C09K8/48 

FIELD: mining.

SUBSTANCE: group of inventions relates to method of termination or, at least, reduction of uncontrolled release of hydrocarbons, blowout from hydrocarbons extraction borehole. Method involves introduction of backfill high-density solid elements at borehole bottom, through suitable pipeline, having multifaceted or spherical, elliptical or parabolic shape, regular or irregular, so, that with introduction said backfill solid elements are accumulated with formation of random packing at borehole bottom, forming column. At that, smallest size is more than 1 mm and largest size is less than 100 mm. Column is completely or, at least partially blocks uncontrolled release of said hydrocarbons. Introduction of said backfill solid elements at borehole bottom is performed in sequence of, at least, following stages: performing introduction of backfill high-density solid elements, both not coated with swelling material and not containing it, having diameter of less than 5 mm. Then performing introduction of backfill high-density solid elements, coated with swelling material, having in 5–15 times larger sizes than backfill high-density solid elements, both not coated with swelling material, and not containing it, introduced at previous stage, in order to form second column, consisting of said backfill solid elements layer. Performing introduction of backfill high-density solid elements, both not coated with swelling material, and not containing it, having in 5–15 times larger sizes than earlier introduced backfill high-density solid elements, both not coated with swelling material and not containing it.

EFFECT: technical result is higher efficiency of reducing hydrocarbons uncontrolled release and blowout.

10 cl, 5 dwg