Method and apparatus for a quadrupole transmitter for...

Details Method and apparatus for a quadrupole transmitter for... Method and apparatus for a quadrupole transmitter for...

2005-08-30

2005-08-30

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

With radiant energy or nonconductive-type transmitter

C324S346000

Reexamination Certificate

active

06937022

ABSTRACT:
The present invention provides a method and apparatus for performing resistivity measurements for the purpose of geo-steering with 180-degree azimuth resolution. All the measurements represent a complementary set of data acquired in two operational modes. The directional mode providing sensitivity of the received signals to the azimuth characteristics of the formation. The deep mode provides a large depth of investigation for resistivity determination and bed boundary detection. The directional mode can be implemented using one receiving coil placed in between quadruple type transmitter. The deep mode represents either array induction measurements or multiple propagation resisitivity (MPR) measurements that provide high depth of investigation for resistivity determination and bed boundary detection.

REFERENCES:
patent: 4712070 (1987-12-01), Clark et al.
patent: 6100696 (2000-08-01), Sinclair
patent: 2369890 (2002-06-01), None

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