| 摘要 |
FIELD: well drilling; nonsetting grouting compositions used in elimination of lost circulation zones in well drilling, repair and isolating operations, and also in equalization of injectivity profile in injection wells. SUBSTANCE: composition includes, wt.p.p.: mud powder, 70-80; sodium metasilicate, 8-25; polyacrylamide, 0.001-0.005; water, up to 100. EFFECT: improved fluidity of composition at initial period and provided stable growth of its plastic strength during long period of time. 2 tblo |
