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1. (WO1998051901) CONDUIT CLEANING MATERIAL AND PROCESS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1998/051901    International Application No.:    PCT/GB1998/001229
Publication Date: 19.11.1998 International Filing Date: 28.04.1998
Chapter 2 Demand Filed:    28.11.1998    
IPC:
E21B 37/00 (2006.01)
Applicants: SOFITECH N.V. [BE/BE]; Rue de Stalle 140, B-1180 Brussels (BE) (AM, AT, AU, AZ, BA, BB, BE, BF, BG, BJ, BR, BY, CF, CG, CH, CI, CM, CN, CU, CY, CZ, DE, DK, EE, ES, FI, FR, GA, GB, GE, GH, GM, GN, GR, GW, HU, ID, IE, IL, IS, IT, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MC, MD, MG, ML, MN, MR, MW, MX, NE, NL, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, SN, SZ, TD, TG, TJ, TM, TT, UA, UG, UZ, VN, YU, ZW only).
COMPAGNIE DES SERVICES DOWELL SCHLUMBERGER S.A. [FR/FR]; 50, avenue Jean Jaurès, F-92541 Montrouge (FR) (FR only).
SCHLUMBERGER CANADA LIMITED [CA/CA]; 24th floor, Monenco Place, 801 6th Avenue, S.W., Calgary, Alberta (CA) (CA only).
JOHNSON, Ashley, Bernard [GB/GB]; (GB)
Inventors: JOHNSON, Ashley, Bernard; (GB)
Agent: MIRZA, Akram, Karim; Schlumberger Cambridge Research Limited, High Cross, Madingley Road, Cambridge CB3 0EL (GB)
Priority Data:
9709635.8 14.05.1997 GB
Title (EN) CONDUIT CLEANING MATERIAL AND PROCESS
(FR) MATERIAU ET PROCEDE DE RECURAGE POUR TUBES
Abstract: front page image
(EN)Novel abrasive particles for cleaning conduits, particularly subterranean wellbores are described. The particles are rounded, preferably spherical, and have a hardness of 80 to 200 Vickers. The particles are preferably made of non-metallic material such as Calcite pellets. The new abrasives cause significantly less damage to the well tubulars than sand.
(FR)L'invention concerne de nouvelles particules abrasives qui permettent de récurer les tubes, notamment les puits de forage souterrains. Ces particules sont arrondies, de préférence sphériques, et ont une dureté comprise entre 80 et 200 Vickers. Elles sont de préférence constituées d'un matériau non métallique, tel que des billes de calcite. Elles abîment significativement moins les tubages des puits que le sable.
Designated States: AM, AT, AU, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, GW, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LT, LU, LV, MD, MG, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TT, UA, UG, UZ, VN, YU, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)