Resistivity tools with load-bearing azimuthally sensitive...

Details Resistivity tools with load-bearing azimuthally sensitive... Resistivity tools with load-bearing azimuthally sensitive...

2007-09-13

2010-10-19

Whittington, Kenneth J (Department: 2858)

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

With radiant energy or nonconductive-type transmitter

C324S338000

Reexamination Certificate

active

07816921

ABSTRACT:
The disclosure provides apparatus and method for estimating an electrical property downhole. The apparatus, in one aspect, includes an antenna that comprises a unitary metallic member that has a longitudinal axis and a radial axis, at least one slot made in the metallic member and an electrical conductor over the at least one slot to form an antenna. In one aspect, a high magnetic permeability material may be placed between the electrical conductor and a bottom of the slots. The antenna may be configured to operate as a transmitter for transmitting electromagnetic signals into a formation or a receiver for receiving electromagnetic signals from the formation.

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