Logging tool
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United States of America Patent
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Nov 24, 2015
Grant Date -
Oct 24, 2013
app pub date -
Dec 21, 2011
filing date -
Dec 22, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to a logging tool for logging formational changes in a borehole, the logging tool having a longitudinal axis. The logging tool comprises a radiating source (5) for emitting an interaction signal, a detector (6) for detecting a reaction signal, and a screen (7) for limiting a volume (53) investigated by the radiating source and the detector, wherein the tool comprises a first part (8) and a second part (9), the second part being able to rotate around the longitudinal axis relative to the first part during use, and the second part comprising the screen (7), and wherein a speed of rotation of the second part is controlled by the rotation unit to be proportional to an output signal of the detector. Furthermore, the present invention relates to a method of characterizing a geological formation surrounding a borehole by a logging tool according to the present invention.
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