FIELD: oil and gas industry.
SUBSTANCE: invention relates to method of separation to solid-liquid of clay solution on oil base including stages of contacting of said clay solution on oil base with oil-in-water emulsion including polymer obtained out of at least one water solved monomer wherein said polymer is not solved before contact with said clay solution on oil base, mixing of oil-in-water emulsion and clay solution on oil base and separation of solid phase from liquid phase of clay solution on oil base. Also the said invention relates to a composition including clay solution on oil base with oil-in-water emulsion including polymer obtained out of at least one water solved monomer wherein the said polymer is not solved before the contact with the said clay solution on oil base. Inventions are developed in dependant claims.
EFFECT: facilitating efficient separation solid-liquid of clay solution on oil base.
30 cl, 29 ex, 11 tbl
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