EP 0377378 B1 19931229 - Method and apparatus for the remote control of a drill string equipment by information sequences.
Title (en)
Method and apparatus for the remote control of a drill string equipment by information sequences.
Title (de)
Verfahren und Vorrichtung zum Fernsteuern einer Bohrgestängeeinrichtung mittels einer Informationsfolge.
Title (fr)
Méthode et dispositif de télécommande d'équipement de train de tiges par séquences d'informations.
Publication
Application
Priority
FR 8817604 A 19881230
Abstract (en)
[origin: EP0377378A1] The present invention relates to a method and apparatus for the remote control of at least one piece of drill-string equipment from an instruction transmitted from the surface. The method according to the invention involves the following steps - transmission from the surface of a first information sequence conforming to a predetermined sequence, - detection of a second sequence resulting from the transmission of the first sequence and comparison of this second sequence with another predetermined sequence, - if there is identity between these last two sequences, the control of said piece of equipment is carried out. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 7/06 (2006.01); E21B 41/00 (2006.01); E21B 47/18 (2012.01)
CPC (source: EP US)
E21B 7/06 (2013.01 - EP US); E21B 47/12 (2013.01 - EP US); E21B 47/18 (2013.01 - EP US)
Designated contracting state (EPC)
GB IT NL
DOCDB simple family (publication)
EP 0377378 A1 19900711; EP 0377378 B1 19931229; CA 2006938 A1 19900630; FR 2641387 A1 19900706; FR 2641387 B1 19910531; NO 300393 B1 19970520; NO 895306 D0 19891228; NO 895306 L 19900702; US 5065825 A 19911119
DOCDB simple family (application)
EP 89403647 A 19891221; CA 2006938 A 19891229; FR 8817604 A 19881230; NO 895306 A 19891228; US 45928289 A 19891229