FIELD: chemistry.
SUBSTANCE: the invention relates to drill fluid modifiers used to treat wellbore walls by pumping the drill fluid while drilling mineral layers. The drill fluid modifier contains, %: copolymer of acrylic, methacrylic and vinylsulfonyl acids 8,25-9,00 (with the following monomer ratio: acrylic acid 15%, methacrylic acid 25%, vinylsulfonyl acid 60%), sodium salt of the copolymer of acrylic and methacrylic acid 4,5-6,8 (with the following monomer ratio: acrylic acid 25%, methacrylic acid 75%), partial calcium salt of polyacrylic acid 2,5-3,6, partial calcium salt of polymethacrylic acid 3,5-4,1, copolymer of allyl alcohol and allylamine 4,8-6,5, polyacrylamide 0,5-1,5, the rest - water.
EFFECT: new composition of drill fluid modifier.
6 ex
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