Acoustics – Geophysical or subsurface exploration – Well logging
Reexamination Certificate
2007-03-27
2009-12-08
Donels, Jeffrey (Department: 2832)
Acoustics
Geophysical or subsurface exploration
Well logging
C181S113000, C181S114000, C181S119000, C181S121000, C367S189000, C367S190000
Reexamination Certificate
active
07628248
ABSTRACT:
A seismic source signal generator includes a mass, a primary accumulator and a secondary accumulator, the secondary accumulator having an internal volume smaller than an internal volume of the primary accumulator. A method for generating a signal using a seismic vibrator includes operating the seismic vibrator using hydraulic fluid, damping hydraulic pressure deviations in the hydraulic fluid using a first accumulator in hydraulic communication with the hydraulic fluid, and damping pressure deviations in the hydraulic fluid using a second accumulator in hydraulic communication with the hydraulic fluid, the second accumulator having an internal volume smaller than an internal volume of the first accumulator.
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Crowell John
Teske James
Wei Zhouhong
Donels Jeffrey
Input / Output Inc.
Russell Christina
Wong Cabello Lutsch Rutherford & Brucculeri LLP
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