Active noise cancellation through the use of magnetic coupling

Details Active noise cancellation through the use of magnetic coupling Active noise cancellation through the use of magnetic coupling

2011-03-22

2011-03-22

Keith, Jack (Department: 3663)

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Well logging

C181S105000

Reexamination Certificate

active

07911877

ABSTRACT:
Passive suppression of casing signals is used to improve the ability to measure formation velocities. Passive suppression includes the use of a magnet slidably coupled to the casing.

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