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STANDARD HANDBOOK OF PETROLEUM & NATURAL GAS ...

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flow channel<br />

-<br />

-<br />

Battery<br />

Gamma ray<br />

Electronics<br />

13<br />

Receiver-<br />

Transmitters Receiver-<br />

Transmitter-<br />

Antenna recess<br />

with loop antenna<br />

Near receiver signal<br />

lPhase shift<br />

Amplitude 1<br />

mlAmplitude 2<br />

Far receiver signal<br />

(a)<br />

Figure 4-275. Compensated dual-resistivity tool; (a) sub design; (b) operating principle. (Courtesy Anadrill [ 11 31.)

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