EP 0500877 B1 19950215 - METHOD FOR CONDUCTING AN OIL DRILLING OPERATION.
Title (en)
METHOD FOR CONDUCTING AN OIL DRILLING OPERATION.
Title (de)
VERFAHREN ZUM DURCHFÜHREN EINES BOHRVORGANGES.
Title (fr)
PROCEDE DE CONDUITE D'UN FORAGE.
Publication
Application
Priority
- FR 9100721 W 19910912
- FR 9011380 A 19900914
Abstract (en)
[origin: WO9205337A1] Method for conducting an oil drilling operation, during which a drill-stem (14) produces the rotation of a tool in an oil well. The method consists of the following steps: continually measuring the rotational speed of the upper end of the drill-stem; continuously measuring the torque applied to that end of the drill-stem; determining the torque applied to that end of the drill-stem; determining the torque variation; establishing the period of torque variation if the amplitude of the variation exceeds a predefined threshold; verifying the stability of said period; comparing the latter, if stable, with at least one predefined theoretical period; and reporting the results obtained to the user in order to control the drilling operation.
IPC 1-7
IPC 8 full level
E21B 44/00 (2006.01)
CPC (source: EP US)
E21B 44/00 (2013.01 - EP US); E21B 44/005 (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 9205337 A1 19920402; AT E118596 T1 19950315; CA 2072138 A1 19920315; CA 2072138 C 19971118; DE 69107441 D1 19950323; DE 69107441 T2 19951214; DK 0500877 T3 19950717; EP 0500877 A1 19920902; EP 0500877 B1 19950215; ES 2071329 T3 19950616; FR 2666845 A1 19920320; FR 2666845 B1 19970110; NO 308427 B1 20000911; NO 921901 D0 19920514; NO 921901 L 19920529; OA 09981 A 19960329; US 5245871 A 19930921
DOCDB simple family (application)
FR 9100721 W 19910912; AT 91916050 T 19910912; CA 2072138 A 19910912; DE 69107441 T 19910912; DK 91916050 T 19910912; EP 91916050 A 19910912; ES 91916050 T 19910912; FR 9011380 A 19900914; NO 921901 A 19920514; OA 60220 A 19920527; US 85696192 A 19920713