FIELD: oil production, particularly for isolating lost-circulation zones and for performing repair and isolation works in wells.
SUBSTANCE: plugging composition includes urea-formaldehyde resin and alumochloride. Acetone-formaldehyde resin is additionally added to the composition. Urea-formaldehyde resin and acetone-formaldehyde resin are taken in the ratio of 1:0.07-1.3. The composition includes 35.0-70.0% by weight of urea-formaldehyde resin, 5.0-45.0 % by weight of acetone-formaldehyde resin and 10.0-35.0 % by weight of alumochloride.
EFFECT: increased plugging stone strength, extended range of plugging composition hardening and improved stability thereof.
1 ex, 1 tbl
Title | Year | Author | Number |
---|---|---|---|
POLYMER COMPOUND | 2006 |
|
RU2333347C1 |
POLYMER STOPPING COMPOUND | 0 |
|
SU1763638A1 |
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PREPARATION METHOD OF BACKFILL COMPOUND FOR REPAIR INSULATION WORK | 2011 |
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Authors
Dates
2005-08-27—Published
2004-04-30—Filed