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1. (WO2013120636) USE OF TERPOLYMERS AS FLUID LOSS ADDITIVES IN WELL CEMENTING
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2013/120636    International Application No.:    PCT/EP2013/050275
Publication Date: 22.08.2013 International Filing Date: 09.01.2013
IPC:
C09K 8/487 (2006.01), C09K 8/12 (2006.01)
Applicants: BASF SE [DE/DE]; 67056 Ludwigshafen (DE)
Inventors: REICHENBACH-KLINKE, Roland; (DE).
WOHLFAHRT, Markus; (DE)
Agent: Witz, Michael; BASF Construction Chemicals GmbH Dr.-Albert-Frank-Str. 32 83308 Trostberg (DE)
Priority Data:
12155128.7 13.02.2012 EP
Title (EN) USE OF TERPOLYMERS AS FLUID LOSS ADDITIVES IN WELL CEMENTING
(FR) UTILISATION DE TERPOLYMÈRES COMME ADDITIFS RÉDUCTEURS DE FILTRAT EN CIMENTATION DE PUITS
Abstract: front page image
(EN)What is proposed is the use of a terpolymer comprising 5 -95 mol%of 2-acrylamido-2-methylpropanesulfonic acid, 5 -95 mol%of N,N-dimethylacrylamideand 5 -12 mol%of acrylic acid as a fluid loss additive in well cementing. Acrylsäure als Fluid Loss-Additiv bei der Bohrlochzementierung.
(FR)L'invention porte sur l'utilisation d'un terpolymère comprenant 5-95 % en mole d'acide 2-acrylamido-2-méthylpropanesulfonique, 5-95 % en mole de N,N-diméthylacrylamide et 5-12 % en mole d'acide acrylique comme additif réducteur de filtrat en cimentation de puits.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)