EP 0526619 B1 19950830 - METHOD FOR AUTOMATICALLY MONITORING THE VIBRATIONAL CONDITION OF A DRILL STRING.
Title (en)
METHOD FOR AUTOMATICALLY MONITORING THE VIBRATIONAL CONDITION OF A DRILL STRING.
Title (de)
VERFAHREN ZUM AUTOMATISCHEN ÜBERWACHEN DER VIBRATIONEN EINES BOHRGESTÄNGES.
Title (fr)
METHODE DE SURVEILLANCE AUTOMATIQUE DE L'ETAT VIBRATOIRE D'UNE GARNITURE DE FORAGE.
Publication
Application
Priority
- FR 9200169 W 19920225
- FR 9102201 A 19910225
Abstract (en)
[origin: WO9214908A1] A method for automatically monitoring the vibrational condition of a drill string fitted with detectors comprises the following steps: obtaining a reference spectrum for each detector; obtaining a spectrum for each detector representing the actual situation; comparing the two spectra to detect possible instabilities in the values measured by the detectors; indication of said instabilities by means of audio and/or visual devices.
IPC 1-7
IPC 8 full level
E21B 44/00 (2006.01); E21B 44/08 (2006.01); E21B 47/00 (2012.01)
CPC (source: EP US)
E21B 44/00 (2013.01 - EP US); E21B 47/00 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
WO 9214908 A1 19920903; AT E127197 T1 19950915; CA 2080483 A1 19920826; CA 2080483 C 20011120; DE 69204396 D1 19951005; DE 69204396 T2 19960502; DK 0526619 T3 19960401; EP 0526619 A1 19930210; EP 0526619 B1 19950830; ES 2079862 T3 19960116; FR 2673237 A1 19920828; FR 2673237 B1 19990226; JP 3194744 B2 20010806; JP H05507533 A 19931028; NO 305999 B1 19990830; NO 924117 D0 19921023; NO 924117 L 19921023; OA 09619 A 19930430; US 5273122 A 19931228
DOCDB simple family (application)
FR 9200169 W 19920225; AT 92906888 T 19920225; CA 2080483 A 19920225; DE 69204396 T 19920225; DK 92906888 T 19920225; EP 92906888 A 19920225; ES 92906888 T 19920225; FR 9102201 A 19910225; JP 50654192 A 19920225; NO 924117 A 19921023; OA 60292 A 19921023; US 93784292 A 19921120