| 摘要 |
FIELD: oil-and-gas industry. ^ SUBSTANCE: invention related to an expansion plugging material and can be used for serial manufacturing of ready to use, dry, finely graded plugging materials, used for absorbing zones sealing during a boring process, for wells of different use complete overhaul and cementing. The expansion plugging material contains wt %: pure plugging Portland cement 35-55, thermally treated at 900-1000C clay with specific surface 400-600 m2/kg 40-60, half-water plaster 2-3, sulfonate 0.01-0.05, tartaric acid 0.01-0.05, sodium formate 0.01-0.45, sulfacell 0.3-0.5. ^ EFFECT: filtration decrease, sidementative stability increase. ^ 2 tbl, 1 ex |
