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1. (WO2001023853) A METHOD AND APPARATUS FOR MEASURING FORCES IN THE PRESENCE OF EXTERNAL PRESSURE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2001/023853    International Application No.:    PCT/EP2000/008608
Publication Date: 05.04.2001 International Filing Date: 01.09.2000
Chapter 2 Demand Filed:    20.04.2001    
IPC:
E21B 47/00 (2012.01), G01L 1/22 (2006.01)
Applicants: SCHLUMBERGER TECHNOLOGY B.V. [NL/NL]; Parkstraat 83-89, NL-2514 JG The Hague (NL) (AE, AL, AM, AT, AU, AZ, BA, BB, BE, BF, BG, BJ, BR, BY, CF, CG, CH, CI, CM, CN, CR, CU, CY, CZ, DE, DK, DM, EE, ES, FI, GA, GD, GE, GH, GM, GN, GR, GW, HR, HU, ID, IE, IL, IN, IS, IT, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MC, MD, MG, MK, ML, MN, MR, MW, MX, MZ, NE, NL, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, SN, SZ, TD, TG, TJ, TM, TR, TT, TZ, UA, UG, UZ, VN, YU, ZA, ZW only).
SERVICES PETROLIERS SCHLUMBERGER [FR/FR]; 42, rue Saint Dominique, F-75007 Paris (FR) (FR only).
SCHLUMBERGER CANADA LIMITED [CA/CA]; 24th Floor, Monenco Place, 801 6th Avenue, S.W., Calgary, Alberta T2P 3W2 (CA) (CA only).
SCHLUMBERGER HOLDINGS LIMITED [--/--]; P.O. Box 71, Graigmuir Chambers, Road Town, Tortola (VG) (GB only).
DEMIA, Laurent [FR/FR]; (FR) (For US Only)
Inventors: DEMIA, Laurent; (FR)
Agent: MENES, Catherine; Etudes & Productions Schlumberger, 26, rue de la Cavée, BP 202, F-92142 Clamart Cedex (FR).
HYDEN, Martin; Etudes et Productions Schlumberger, 1, rue Henri Becquerel, F-92142 Clamart Cedex (FR)
Priority Data:
99/11948 24.09.1999 FR
Title (EN) A METHOD AND APPARATUS FOR MEASURING FORCES IN THE PRESENCE OF EXTERNAL PRESSURE
(FR) PROCEDE ET DISPOSITIF POUR MESURER DES FORCES EN PRESENCE DE PRESSION EXTERIEURE
Abstract: front page image
(EN)In order to measure forces F exerted on a part in a given direction and in the presence of an external pressure p, the part has integrated therein a sensor (10) which delivers an output signal of the form S = $g(a).F + $g(b).p + $g(g), and said sensor is dimensioned in such a manner as to cause the coefficient $g(b) to be zero. To this end, a sensor (10) is used that includes a tube (12) formed by a thinner walled portion (12a) and a thicker walled portion (12b), together with strain gauges (16a, 16b, 18a, 20) mounted in the tube (12) and interconnected to form a Wheatstone bridge.
(FR)Pour mesurer des forces F exercées sur une partie dans un sens donné et en présence d'une pression extérieure p, la partie renferme un capteur (10) qui fournit un signal de sortie sous la forme de S= $g(a).F + $g(b).p + $g(g), et les dimensions dudit capteur sont telles qu'elles contraignent le coefficient $g(b) à zéro. A cet effet, un capteur (10) est utilisé. Ledit capteur comprend un tube (12) formé d'une partie à paroi mince (12a) et d'une partie à paroi épaisse (12b), ainsi qu'à des jauges de contrainte (16a, 16b, 18a, 20) montées dans le tube (12) et reliées entre elles de façon à former un pont de Wheatstone.
Designated States: AE, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CR, CU, CZ, DE, DK, DM, 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, 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)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)