| 摘要 |
FIELD: oil and gas industry. ^ SUBSTANCE: expansive plugging material includes the following, wt %: plugging Portland cement 55-70, slate ash 20-30, magnesite 10-15. ^ EFFECT: uniform expansion of plugging material during the curing process, slowing down of its curing time, and increasing strength of cured plugging material. ^ 2 ex, 1 tbl |
