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1. (WO2009056430) ADDITIVE FOR CONTROLLING CEMENT SLURRY RHEOLOGY
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2009/056430    International Application No.:    PCT/EP2008/063558
Publication Date: 07.05.2009 International Filing Date: 09.10.2008
IPC:
C04B 24/26 (2006.01), C04B 28/02 (2006.01), C09K 8/467 (2006.01)
Applicants: SERVICES PETROLIERS SCHLUMBERGER [FR/FR]; 42, rue Saint Dominique, F-75007 Paris (FR) (FR only).
SCHLUMBERGER HOLDINGS LIMITED; 71 Craigmuir Chambers, Road Town, Tortula (VG) (GB, JP, NL only).
SCHLUMBERGER CANADA LIMITED [CA/CA]; 525 - 3rd Avenue S.W., Calgary, Alberta T2P 0G4 (CA) (CA only).
SCHLUMBERGER TECHNOLOGY B.V. [--/NL]; Parkstraat 83-89, NL-2514 JG The Hague (NL) (BG, CZ, DE, DK, GR, HU, IE, IT, LT, NO, PL, RO, SI, SK, TR only).
PRAD RESEARCH AND DEVELOPMENT LIMITED [--/--]; 71 Craigmuir Chambers, Road Town, Tortola (VG) (AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BE, BF, BH, BJ, BR, BW, BY, BZ, CF, CG, CH, CI, CM, CN, CO, CR, CU, CY, DM, DO, DZ, EC, EE, EG, ES, FI, GA, GD, GE, GH, GM, GN, GQ, GT, GW, HN, HR, ID, IL, IN, IS, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LV, LY, MA, MC, MD, ME, MG, MK, ML, MN, MR, MT, MW, MX, MY, MZ, NA, NE, NG, NI, NZ, OM, PG, PH, PT, RS, RU, SC, SD, SE, SG, SL, SM, SN, ST, SV, SY, SZ, TD, TG, TJ, TM, TN, TT, TZ, UA, UG, UZ, VC, VN, ZA, ZM, ZW only).
DROCHON, Bruno; (US) (For US Only)
Inventors: DROCHON, Bruno; (US)
Agent: HYDEN, Martin; Rouse Patents, 1st Floor, 228-240 Banbury Road, Oxford Oxfordshire OX2 7BY (GB)
Priority Data:
07119647.1 30.10.2007 EP
Title (EN) ADDITIVE FOR CONTROLLING CEMENT SLURRY RHEOLOGY
(FR) ADDITIF POUR CONTRÔLER LA RHÉOLOGIE D'UNE BOUILLIE DE CIMENT
Abstract: front page image
(EN)A cement composition for use in a wellbore comprising a cement blend and at least two polyvinylalcohols wherein the polyvinylalcohols have different degrees of hydrolysis such that the rheology of the cement slurry capable of being formed from the composition is stable during temperatures changes.
(FR)L'invention porte sur une composition de ciment destinée à être utilisée dans un puits de forage comprenant un mélange de ciment et au moins deux alcools polyvinyliques, ces derniers ayant différents degrés d'hydrolyse de telle sorte que la rhéologie de la bouillie de ciment pouvant être formée à partir de la composition est stable pendant des changements de températures.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, 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, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MT, NL, NO, PL, PT, RO, SE, SI, SK, 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)