METHOD TO SUPPRESS SPILLS FROM EMERGENCY OIL AND GAS WELLS DURING FIELD DEVELOPMENT Russian patent published in 2012 - IPC E21B33/10 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry, namely, to methods for suppression of spills from emergency oil and gas wells and may be used to eliminate accidents with the help of shut-off plugs during field development, arranged at water reservoir bottoms, on the day surface, in underground mines, and also in continental shelves. During realisation of the method, using a cut casing pipe, a discrete material that is easily deformed under its own weight, having size and specific weight that ensure material falling in an ascending flow of oil and gas, is supplied in a quantity sufficient to form a shut-off plug in the well, which makes it possible to suppress the reservoir fluid of oil or gas. The shut-off plug may be formed in intervals, where first the discrete material of larger fraction is filled, then fractions with reducing size of solids are serially filled. The discrete material may be used in the form of solids of revolution. The material may be supplied via a hopper, which is installed above the cut casing pipe. After formation of a shut-off plug, the hopper is filled with a hardening mud. Discrete particles are made either from a homogeneous material or from composite materials.

EFFECT: invention provides for safety of a technological process and reduced impact at environment.

6 cl, 2 dwg