Inductor devices – With outer casing or housing
Reexamination Certificate
2006-11-21
2006-11-21
Nguyen, Tuyen T (Department: 2832)
Inductor devices
With outer casing or housing
C324S339000
Reexamination Certificate
active
07138897
ABSTRACT:
An induction tool includes a conductive mandrel; at least one array including a transmitter, a bucking coil, and a receiver disposed in an insulating tool body surrounding the conductive mandrel; and an electrode disposed on the insulating tool body at a selected location between the bucking coil and the receiver, wherein the selected location is spaced from the transmitter at a distance corresponding approximately to the harmonic mean of the distance between the transmitter and the bucking coil and the distance between the transmitter and the receiver, and wherein the electrode includes a contact forming a conductive path to the conductive mandrel. Additional electrodes may be disposed above and below each transmitter and receiver coil to reduce sensitivity to eccentricity of the tool in the borehole.
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Davydycheva Sofia
Homan Dean M.
Minerbo Gerald
Wang Hanming
McEroney Kevin P.
Nguyen Tuyen T
Schlumberger Technology Corporation
Segura Victor H.
White Bryan L.
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