FIELD: oil and gas industry.
SUBSTANCE: method of remedial cementing operations in wells includes preparing and injecting water-insulating composition into the well, containing, wt %: acetone-formaldehyde resin - 20.0-40.0, alkali drain of caprolactam production - 45.0-60.0 and 10% sodium hydroxide solution - 15-20.0. To prepare the water-insulating composition, alkali drain of caprolactam production is mixed with 10% sodium hydroxide solution and added with stirring to acetone-formaldehyde resin. The produced water-insulating composition is pumped into the well, after which it is left for gelling for 24-48 hours.
EFFECT: improved efficiency of the method of remedial cementing operations by increasing the radius of water-insulating screen and increasing the coverage of action, extended time interval for gel formation, and reduced duration and labour intensity of operations.
1 tbl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
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|
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| METHOD OF PRODUCTION STRING SEALING | 2013 |
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RU2667241C1 |
