Electromagnetic power and communication link particularly...

Details Electromagnetic power and communication link particularly... Electromagnetic power and communication link particularly...

2005-02-15

2005-02-15

Wong, Albert K. (Department: 2635)

Communications: electrical

Wellbore telemetering or control

Using a specific transmission medium

C340S854600

Reexamination Certificate

active

06856255

ABSTRACT:
An electromagnetic coupling system is disclosed which includes a first electromagnetic transducer sealingly disposed in an outer wall of a tool mandrel, the mandrel adapted to be positioned in a drill collar. A second electromagnetic transducer is sealingly disposed in an interior of a port in the drill collar. The second transducer is positioned so that it is proximate the first transducer when the mandrel is positioned in the drill collar. A third electromagnetic transducer is sealingly disposed in an exterior of the port in the collar. The second and third transducers define a sealed chamber in the port. The second and third transducers are electrically coupled to power conditioning and signal processing circuits disposed in the chamber. A fourth transducer is positioned proximate the third transducer. The fourth transducer is electrically coupled to at least one of a sensor, an external communication line and an external power line.

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