Externally guided and directed field induction resistivity tool

Details Externally guided and directed field induction resistivity tool Externally guided and directed field induction resistivity tool

2009-09-09

2011-12-06

Aurora, Reena (Department: 2858)

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

With radiant energy or nonconductive-type transmitter

C324S333000, C324S345000

Reexamination Certificate

active

08072221

ABSTRACT:
An induction resistivity tool incorporated into a downhole tool string comprises an outer wall of a downhole component having an outer surface, and at least one induction transmitter assembly disposed along the outer surface. The transmitter assembly includes at least one induction transmitter coil which is wound about one or more transmitter cores. The transmitter assembly is adapted to create electromagnetic fields that originate the induction signal from outside the outer wall while substantially preventing the induction signal from entering the outer wall.

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