System and method for telemetry in a wellbore

Details System and method for telemetry in a wellbore System and method for telemetry in a wellbore

E - Fixed Constructions

21

B

E21B 47/16 (2006.01)

Patent

CA 2395082

A method and apparatus for creating a telemetry signal in a drillstring is disclosed. Opposite torsional forces are imparted on the drillstring at two or more different locations. A steel shaft inside the drillstring is coupled to the drillstring via electromagnetic actuators at end and rigidly attached to the drillstring at the other end. A similar method and apparatus for generating axial telemetry signal in the drillstring is also disclosed.

L'invention concerne un procédé et un dispositif destinés à créer un signal de télémétrie dans un train de tiges. Des forces de torsion opposées sont appliquées sur au moins deux parties du train de tiges. Un arbre d'acier disposé à l'intérieur du train de tiges est couplé au train de tiges par l'intermédiaire d'actionneurs électromagnétiques au niveau d'une extrémité, et attaché fixement au train de tiges sur l'autre extrémité. L'invention concerne également un procédé et un dispositif similaires destinés à produire signal de télémétrie axial dans le train de tiges.

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