| 摘要 |
FIELD: oil and gas industry, particularly isolation materials adapted to case wells and to isolate formations. ^ SUBSTANCE: insulation material comprises spent clay drilling mud having predetermined density, polyacrylamide, gel-forming agent, namely liquid glass, and polyethylenepolyamine. The polyethylenepolyamine includes diethylenetriamine, triethylenetetramine and triethylenepentamine. Above components are taken in the following amounts (% by clay drilling mud weight): polyacrylamide - 0.05-1.00, liquid glass - 0.1-1.5 and polyethylenepolyamine - 0.01-0.2. ^ EFFECT: increased structural properties, increased stability and reduced filtering ability. ^ 1 ex, 1 tbl |
