Method for discriminating microphonic noise in proportional...

Details Method for discriminating microphonic noise in proportional... Method for discriminating microphonic noise in proportional...

G - Physics

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T

358/3

G01T 5/04 (2006.01) E21B 47/01 (2006.01) G01V 5/04 (2006.01)

Patent

CA 2040299

ABSTRACT OF THE DISCLOSURE This disclosure is directed to a detector system for use in measuring while drilling (MWD) equipment. It comprises preferably duplicate chambers positioned to one another and mounted in a MWD system where they are subject to the same shock and vibration. The shock and vibration impinge on the two chambers, and cause two output signals to be formed. The two output signals are applied to a differential amplifier so that the microphonic portion of the signal is cancelled. This then leads to a differential output signal which carries in it the signals representing nuclear events detected by the similar or duplicate detector means. Alternately, a single chamber can be used if it is provided with two anode wires and they are connected to the differential amplifier for signal cancellation. HLS 89.124

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