METHOD FOR OBTAINING ACRYLIC REAGENT FOR INSULATION OF WATER INFLUXES IN WELL (VERSIONS) Russian patent published in 2014 - IPC C09K8/44 

FIELD: oil and gas industry.

SUBSTANCE: method for obtaining acrylic reagent for insulation of water influxes to a well involves hydrolysis of polyacrylonitrile raw material with liquid sodium glass in water mixture with pH=12-14 at the following mixture component ratio, wt %: polyacrylonitrile raw material 3.8 - 4.8, liquid sodium glass 48 - 59.5, water is the rest, in which mixture temperature at constant mixing is raised to 95-100°C, maintained during the period of time, which is required for formation of homogeneous viscous uniformly painted mass; obtained mass is exposed without any heating and mixing till it is separated into two layers; top layer - polymer solution is separated as the obtained acrylic reagent, and bottom layer - alkali solution that contains liquid sodium glass is used for hydrolysis of polyacrylonitrile raw material. Method for obtaining acrylic reagent for insulation of water influxes to a well involves mixing of several polymer solutions obtained by means of the above method.

EFFECT: obtaining reagent with considerably higher gel forming ability in combination with lower viscosity; stability of phase state of reagent.

2 cl, 2 tbl, 7 ex