EP 0657620 B1 19970618 - Method and system for the control of the "stick-slip" of a drill tool
Title (en)
Method and system for the control of the "stick-slip" of a drill tool
Title (de)
Verfahren und System zur Kontrolle des "Stick-Slip" eines Bohrwerkzeugs
Title (fr)
Méthode et système de contrÔle de "stick-slip" d'un outil de forage
Publication
Application
Priority
FR 9314837 A 19931208
Abstract (en)
[origin: EP0657620A1] The present invention relates to a method and a system which are designed for controlling the behaviour of a drilling tool. An additional resistive torque (18) is added to the torque at the drilling tool (17) so that the overall torque (19) at the tool is an increasing function of the speed of rotation of the tool. The system according to the invention comprises regulation means capable of creating an additional resistive torque at the tool. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 44/00 (2006.01); E21B 44/04 (2006.01)
CPC (source: EP US)
E21B 44/005 (2013.01 - EP US); E21B 44/04 (2013.01 - EP US)
Designated contracting state (EPC)
GB IT NL
DOCDB simple family (publication)
EP 0657620 A1 19950614; EP 0657620 B1 19970618; FR 2713700 A1 19950616; FR 2713700 B1 19960315; NO 306521 B1 19991115; NO 944726 D0 19941207; NO 944726 L 19950609; US 5507353 A 19960416
DOCDB simple family (application)
EP 94402698 A 19941125; FR 9314837 A 19931208; NO 944726 A 19941207; US 35085094 A 19941207