Method and apparatus for determining formation resistivity...

Details Method and apparatus for determining formation resistivity... Method and apparatus for determining formation resistivity...

2007-03-16

2009-06-30

Whittington, Kenneth J (Department: 2862)

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

Using electrode arrays, circuits, structure, or supports

C175S050000

Reexamination Certificate

active

07554329

ABSTRACT:
A method and apparatus for obtaining a resistivity measurement of an earth formation surrounding a borehole in an MWD device uses the drillbit and the adjacent portion of the drill collar as a focusing electrode for focusing the measure current from a measure electrode on the face or side of the drillbit. This provides the ability to see ahead of and azimuthally around the drillbit.

REFERENCES:
patent: 2181601 (1939-11-01), Jakosky
patent: 3365658 (1968-01-01), Birdwell
patent: 4475591 (1984-10-01), Cooke, Jr.
patent: 5235285 (1993-08-01), Clark et al.
patent: 5339036 (1994-08-01), Clark et al.
patent: 5339037 (1994-08-01), Bonner et al.
patent: 5359324 (1994-10-01), Clark et al.
patent: 5720355 (1998-02-01), Lamine et al.
patent: 5813480 (1998-09-01), Zaleski et al.
patent: 6064210 (2000-05-01), Sinclair
patent: 6359438 (2002-03-01), Bittar
patent: 6384605 (2002-05-01), Li
patent: 6850068 (2005-02-01), Chemali et al.
patent: 7350568 (2008-04-01), Mandal et al.
patent: 7394257 (2008-07-01), Martinez et al.
patent: 2004/0104726 (2004-06-01), Chemali et al.
S. Bonner et al;A New Generation of Electrode Resistivity Measurements for Formation Evaluation While Drilling, SPWLA 35th Annual Logging Symposium, Jun. 19-22, 1994, pp. 1-25, Figs.

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