EP 4402220 A1 20240724 - DISPERSION OF WATER-SOLUBLE POLYMER FOR HYDRAULIC FRACTURING
Title (en)
DISPERSION OF WATER-SOLUBLE POLYMER FOR HYDRAULIC FRACTURING
Title (de)
DISPERSION VON WASSERLÖSLICHEM POLYMER FÜR HYDRAULISCHE FRAKTURIERUNG
Title (fr)
DISPERSION DE POLYMERE HYDROSOLUBLE POUR LA FRACTURATION HYDRAULIQUE
Publication
Application
Priority
- FR 2109669 A 20210915
- EP 2022075444 W 20220913
Abstract (en)
[origin: CA3230987A1] The present application relates to an injection fluid F for hydraulic fracturing comprising at least one synthetic water-soluble polymer P with a weight-average molecular weight greater than or equal to 1 million daltons, said fluid being prepared according to a method comprising the following successive steps: a) preparing, by radical polymerization, an inverse emulsion E comprising between 15% and 40% by weight of polymer P, between 20% and 60% by weight of water and at least one hydrocarbon-based solvent, the percentages being expressed by weight relative to the weight of the emulsion E, b) distilling the inverse emulsion E to obtain a dispersion D comprising between 40% and 60% by weight of particles of polymer P, less than 10% by weight of water and at least one hydrocarbon-based solvent, the percentages being expressed by weight relative to the weight of the dispersion D, c) diluting the dispersion D with 1% to 15% by weight of an aqueous solution S comprising between 20% and 60% by weight of salts, the percentages being expressed by weight relative to the weight of the dispersion D.
IPC 8 full level
CPC (source: EP US)
C09K 8/68 (2013.01 - EP US); C09K 8/88 (2013.01 - EP US); C09K 2208/28 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
FR 3126988 A1 20230317; AR 127048 A1 20231213; CA 3230987 A1 20230323; CN 118043430 A 20240514; EP 4402220 A1 20240724; US 2024384159 A1 20241121; WO 2023041539 A1 20230323
DOCDB simple family (application)
FR 2109669 A 20210915; AR P220102477 A 20220913; CA 3230987 A 20220913; CN 202280062312 A 20220913; EP 2022075444 W 20220913; EP 22789177 A 20220913; US 202218689064 A 20220913