| 摘要 |
FIELD: oil and gas industry, particularly methods or devices for cementing, for plugging holes, crevices, or the like. ^ SUBSTANCE: method involves removing pumping equipment from borehole; lowering tubing string in well; injecting hardening water-proofing solution in well through tubing string; forming water-tight layer in front of water-developing formation intervals. The water-proofing solution is cement mix modified with polyvinylacetate reagent taken in amount of 0.25-0.5% by cement weight. The water-proofing solution volume provides filling of hole annuity in non-cased horizontal well bore part through flow string lowered to horizontal well bore part bottom. Then the water-proofing solution is held in well for 2-3 hours and flushed out from the hole annuity by direct or reverse circulation after cement hardening initiation. ^ EFFECT: reduced time and material consumption. ^ 2 dwg |
