FIELD: chemistry.
SUBSTANCE: invention relates to compositions for sealing influx of formation water into oil, gas and oil-and-gas wells and can be used in oil-and-gas industry. The backfilling composition for selective sealing of influx of formation water contains the following, wt %: gel-forming clay - bentonite 5.5 - 7.5, filler - expanded-clay powder 5.5-7.5, sodium silicate - liquid glass with density 1500±20 kg/m3 35-45, sodium silicofluoride 3.5-4.5, alkali metal carbonate 0.5 - 1.5, alkali metal chromate 0.05-0.09, CMC-Na 0.3-0.5, fresh water - the balance.
EFFECT: high efficiency of sealing water influx.
4 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF SELECTIVE INSULATION OF FLUID ENTRY | 2007 |
|
RU2362007C1 |
| METHOD TO PREPARE OILY MILL SCALE OF METALLURGIC PRODUCTION FOR BRIQUETTING | 2010 |
|
RU2455372C1 |
| INSULATING COMPOSITION FOR STEEL CASTING | 2011 |
|
RU2443503C1 |
| METHOD FOR PREPARATION AND COMPOSITION OF ADDITIVE FOR DESULPHURATION OF SULPHUR-CONTAINING FUEL | 2011 |
|
RU2451717C1 |
| FILTERING SOLUTION FOR HOOKAH | 2011 |
|
RU2469626C1 |
| DEICING COMPOSITION | 2011 |
|
RU2453574C1 |
| METHOD TO TREAT HYDROCARBON PRODUCTS FROM ACID ADMIXTURES | 2010 |
|
RU2436620C1 |
| FLOWING WELL KILLING METHOD | 2004 |
|
RU2275497C2 |
| FLAME RETARDANT FOR WOOD PROCESSING | 2011 |
|
RU2469843C2 |
| HEAT CARRIER AS ANTIFREEZE | 1997 |
|
RU2116326C1 |
