| 摘要 |
FIELD: oil-and-gas production. ^ SUBSTANCE: in method of preparation of two-component plugging composition in well, including going-in into production string on oil-well tubing - OWT of perforated nipple, contiguous pumping in into OWT of the first component of plugging composition, displacement fluid, the second component of plugging composition and following mixing of components at its simultaneous pumping in by OWT and tube space, inside the perforated nipple there are installed through and landing rings, herewith internal diametre of landing ring is less than internal diametre of through ring, after pumping in of displacement fluid it is installed in OWT cement plugc of external diametre, providing ability of its passing at pressure application across the through ring, it is implemented pumping in of additional displacement fluid, after pumping in of the second component of plugging composition it is implemented pumping in of squeezing fluid with overlapping by cement plug of through ring and out of the first component of plugging composition and displacement fluid into tube spacing, it is continued pumping in of squeezing fluid with passing of cement plug across the through ring, its movement into bottom part of perforated nipple and overlapping of landing ring, herewith required ratio of consumption of components of plugging composition is provided by adjustable choke, inlet opening of which is connected through T-branch to OWT and injection line, and outlet opening of adjustable choke is connected to tube space of well. ^ EFFECT: simplification of method and improvement of plugging composition. ^ 1 ex, 2 dwg |
