Casing thickness evaluation method

Details Casing thickness evaluation method Casing thickness evaluation method

2009-04-17

2011-11-22

Noori, Max (Department: 2855)

Measuring and testing

Vibration

By mechanical waves

Reexamination Certificate

active

08061206

ABSTRACT:
Evaluating casing thickness by inducing SH0 and SH1 modes of a shear wave in the casing. The SH0 group velocity and SH1 mode group velocity (Vg) are measured and the measured SH0 mode group velocity is assigned as the tubular material shear velocity (Vs). A shear wave wavelength λ from the ratio of SH0 mode frequency (fo) and the measured SH0 group velocity is estimated. The tubular thickness (d) is estimated from the estimated shear wave wavelength λ. The transmitter can be calibrated to operate at an optimum frequency.

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