FIELD: oil-and-gas industry.
SUBSTANCE: set of inventions relates to sealing of borehole perforation and composition used to this end. Proposed method comprises adding bridging material to make plugs in clearances so that fluid leaks are limited or eliminated. Bridging material is preferably degradable or soluble plastic fibers, insignificantly larger than said clearances. If necessary, said particles may be nondegradable, stiff fibers of various shape and smaller than clearances but able to close them. Mixes of bridging materials may well be used. Bridging material may be added to sealing balls, fitted thereafter, or in both versions.
EFFECT: eliminated leaks between balls and perforations.
18 cl, 2 dwg
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