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1. (WO2010079379) DRILLSTRING DYNAMICS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2010/079379 International Application No.: PCT/IB2009/007477
Publication Date: 15.07.2010 International Filing Date: 04.11.2009
IPC:
E21B 44/00 (2006.01) ,E21B 47/00 (2006.01)
E FIXED CONSTRUCTIONS
21
EARTH OR ROCK DRILLING; MINING
B
EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
44
Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
E FIXED CONSTRUCTIONS
21
EARTH OR ROCK DRILLING; MINING
B
EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
47
Survey of boreholes or wells
Applicants:
SCHLUMBERGER TECHNOLOGY B.V. [NL/NL]; Parkstraat 83-89 NL-2514 JG The Hague, NL (AL, AU, AZ, BG, CO, CZ, DE, DK, GQ, GR, HU, ID, IE, IL, IT, KR, KZ, LT, MX, NO, NZ, OM, PL, RO, RU, SI, SK, TD, TM, TN, TR, TT, UZ, ZA)
SCHLUMBERGER HOLDINGS LIMITED (SHL); P.O. Box 71 Graigmuir Chambers Road Town Tortola, VG (GB, JP, NL)
SCHLUMBERGER CANADA LIMITED [CA/CA]; 525-3rd Avenue S.W. Calgary, Alberta T2P 0G4, CA (CA)
SERVICES PETROLIERS SCHLUMBERGER [FR/FR]; 42 rue Saint Dominique F-75007 Paris, FR (FR)
PRAD RESEARCH AND DEVELOPMENT LIMITED; Craigmuir Chambers P.O. Box 71 , Road Town Tortola, VG (AE, AG, AM, AO, AT, BA, BB, BE, BF, BH, BJ, BR, BW, BY, BZ, CF, CG, CH, CI, CL, CM, CN, CR, CU, CY, DM, DO, DZ, EC, EE, EG, ES, FI, GA, GD, GE, GH, GM, GN, GT, GW, HN, HR, IN, IS, KE, KG, KM, KN, KP, LA, LC, LK, LR, LS, LU, LV, LY, MA, MC, MD, ME, MG, MK, ML, MN, MR, MT, MW, MY, MZ, NA, NE, NG, NI, PE, PG, PH, PT, RS, SC, SD, SE, SG, SL, SM, SN, ST, SV, SY, SZ, TG, TJ, TZ, UA, UG, VC, VN, ZM, ZW)
SCHLUMBERGER SEACO, INC. [PA/KR]; 2nd Floor, Jun-il Building 1579-9, Seocho-Dong Seoul, KR (KR)
JEFFRYES, Benjamin [GB/GB]; GB (UsOnly)
Inventors:
JEFFRYES, Benjamin; GB
Agent:
GAHLINGS, Steven, A.; Intellectual Property Law Department Schlumberger Cambridge Research Limited High Cross, Madingley Road Cambridge CB3 0EL, GB
Priority Data:
0900229.608.01.2009GB
Title (EN) DRILLSTRING DYNAMICS
(FR) DYNAMIQUE D'UN TRAIN DE TIGES DE FORAGE
Abstract:
(EN) A method of determining movement dynamics of a drillstring is provided that includes the steps of calculating or measuring a friction coefficient for the sliding contact between the drillstring and the sidewall of a borehole, the friction coefficient being a varying function of non-zero sliding velocities; and predicting movement dynamics of the drillstring using the measured friction coefficient.
(FR) L'invention concerne un procédé de détermination de la dynamique de déplacement d'un train de tiges de forage, consistant à calculer ou mesurer un coefficient de frottement pour le contact de glissement entre le train de tiges de forage et la paroi latérale d'un trou de forage, le coefficient de frottement étant variable en fonction de vitesses de glissement non nulles. Le procédé consiste également à prévoir la dynamique de déplacement du train de tiges de forage au moyen du coefficient de frottement mesuré.
front page image
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, 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, PE, 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 (ARIPO) (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, MK, MT, NL, NO, PL, PT, RO, 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)
Also published as:
EP2373871US20110301924CA2748857