Apparatus and method for down hole vibration spectrum analysis

Details Apparatus and method for down hole vibration spectrum analysis Apparatus and method for down hole vibration spectrum analysis

1978-03-28

1979-04-24

Myracle, Jerry W.

Measuring and testing

Borehole or drilling

Downhole test

73659, E21B 4700

Patent

active

041505689

ABSTRACT:
An apparatus and a method are provided for detecting and measuring vibrations of a selected portion of a drill string in a bore hole. The vibrations are detected by a transducer which produces an electrical signal representative of the vibrations. The signal is applied to a band-pass filter which produces an output signal representative of vibrations occurring at frequencies within the pass band of the filter. The pass band is repetitively stepped through a predetermined frequency range under the control of digital circuitry.

REFERENCES:
patent: 3626482 (1971-12-01), Quichaud et al.
patent: 3703096 (1972-11-01), Vitter, Jr. et al.

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