Ruggedized multi-layer printed circuit board based downhole...

Details Ruggedized multi-layer printed circuit board based downhole... Ruggedized multi-layer printed circuit board based downhole...

2006-08-29

2006-08-29

Wimer, Michael C. (Department: 2828)

Communications: radio wave antennas

Antennas

Buried underground or submerged under water

C343S788000, C324S338000

Reexamination Certificate

active

07098858

ABSTRACT:
The specification discloses a printed circuit board (PCB) based ferrite core antenna. The traces of PCBs form the windings for the antenna, and various layers of the PCB hold a ferrite core for the windings in place. The specification further discloses use of such PCB based ferrite core antennas in downhole electromagnetic wave resistivity tools such that azimuthally sensitivity resistivity readings may be taken, and borehole imaging can be performed, even in oil-based drilling fluids.

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EPO International Search Report, International Application No. PCT/US03/29791, dated Sep. 20, 2005.

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