FIELD: oil and gas production.
SUBSTANCE: invention relates to building wells and major repairs thereof, namely involving supporting casing strings and creating fluid-proofing isolation covers within chemical deposit interval as well as to exploitation of deposits and well abandonment. Grouting mix contains 50.00-53.95% calcium sulfate (gypsum semihydrate), 2.00-8.50% hardening additive constituted by fine mineral substance "Mikrodur-26RX", 0.05-0.08% nitrilotrimethylphosphoric acid, 41.42-44.00% sodium chloride solution having density 1.18 g/cc.
EFFECT: expanded technological possibilities of grouting mix due to proper pumpability and setting times, enhanced fluid-proofness and durability of grouting stone under complicated water-exchange conditions.
2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| GYPSUM-MAGNESIUM GROUTING MORTAR | 2013 |
|
RU2524774C1 |
| GROUTING MORTAR | 2013 |
|
RU2537679C2 |
| WEIGHTED GROUTING GYPSUM MIXTURE | 2011 |
|
RU2468058C1 |
| HYDROGEN SULPHIDE RESISTANT GROUTING MORTAR | 2011 |
|
RU2471843C1 |
| METHODS OF ISOLATION OF THE PRODUCTIVE STRATA OVERLAPPED BY THE CASING STRINGS AND THE GROUTING MORTAR FOR ITS EXERCISE | 2005 |
|
RU2299230C2 |
| HYDROGEN SULPHIDE RESISTANT SEALING INHIBITED GROUTING MORTAR | 2015 |
|
RU2588078C1 |
| GROUTING MORTAR | 2015 |
|
RU2601878C1 |
| BASE OF CURABLE GROUTING MORTAR | 2011 |
|
RU2468187C1 |
| BACKFILLING COMPOSITION FOR INSTALLATION OF KICK-OFF SUPPORT BRIDGES | 2010 |
|
RU2434923C1 |
| CONSTRUCTION METHOD OF DEEP WELL, PLUGGING SOLUTION FOR ITS IMPLEMENTATION AND STRUCTURE OF DEEP WELL | 2008 |
|
RU2386787C9 |
