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Machine translation
1. (WO2002033215) DUAL VALVE WELL CONTROL IN UNDERBALANCED WELLS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2002/033215    International Application No.:    PCT/GB2001/004619
Publication Date: 25.04.2002 International Filing Date: 17.10.2001
Chapter 2 Demand Filed:    04.01.2002    
IPC:
E21B 21/00 (2006.01), E21B 34/08 (2006.01), E21B 34/10 (2006.01)
Applicants: WEATHERFORD/LAMB, INC. [US/US]; c/o The United States Corporation Company, 1013 Centre Road, Wilmington, DE 19805 (US) (For All Designated States Except US).
PIA, Giancarlo [GB/GB]; (GB) (For US Only)
Inventors: PIA, Giancarlo; (GB)
Agent: MCCALLUM, William, Potter; Cruikshank & Fairweather, 19 Royal Exchange Square, Glasgow G1 3AE (GB)
Priority Data:
0025515.8 18.10.2000 GB
Title (EN) DUAL VALVE WELL CONTROL IN UNDERBALANCED WELLS
(FR) CONTROLE DE PUITS
Abstract: front page image
(EN)A method of isolating a reservoir of production fluid in a formation comprises providing a pair of valves (14, 16) in a bore intersecting a production formation and in which the hydrostatic pressuer in the bore at the formation is normally lower than the formation pressure, and then ontrolling the valves (14, 16) from surface such that the valves (14, 16) will only move from a closed configuration to an open configuration on experiencing a predetermined differential pressure across the valves.
(FR)L'invention concerne un procédé d'isolation d'un réservoir de fluide de production dans une formation géologique, qui comporte les étapes consistant à : prévoir deux soupapes (14, 16) dans un forage coupant une formation de production, et dans lequel la pression hydrostatique au niveau de cette formation est normalement inférieure à la pression de formation ; et commander ensuite les soupapes (14, 16) depuis la surface de sorte qu'elles (14, 16) se déplacent uniquement dans le sens d'une configuration fermée vers une configuration ouverte lorsqu'une pression différentielle prédéterminée est appliquée sur celles-ci.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, 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, 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)