Inverse emulsion for hydraulic fracturing The present application relates to a water-in-oil inverse emulsion comprising: an oil; - some water ; - at least one water-soluble cationic copolymer with an average molar mass greater than 3 million daltons, containing between 18 and 32 mol% of cationic monomers and 68 and 82 mol% of nonionic monomers; - at least one inversion agent and at least one emulsifying agent, the mass ratio R of the total amount of inversion agent to the total amount of emulsifying agent being greater than 1.8, - the agent of inversion being chosen from an ethoxylated nonylphenol, preferably having between 4 and 10 ethoxylations; an ethoxylated / propoxylated alcohol, preferably having ethoxylations / propoxylations so as to have a total number of carbon between C12 and C25, an ethoxylated tridecyl alcohol and an ethoxylated / propoxylated fatty alcohol. - the emulsifying agent being chosen from sorbitan monooleate, polyethoxy sorbitan esters or diethanolamide of tall oil fatty acids, and its use for hydraulic fracturing.
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