Acoustic isolator between downhole transmitters and receivers

Details Acoustic isolator between downhole transmitters and receivers Acoustic isolator between downhole transmitters and receivers

2007-05-15

2007-05-15

Donovan, Lincoln (Department: 2837)

Acoustics

Geophysical or subsurface exploration

Seismic source and detector

C181S102000, C181S106000, C181S113000, C367S025000, C367S162000

Reexamination Certificate

active

10771213

ABSTRACT:
Apparatus and methods for acoustically isolating logging tool receiver and transmitter sections. One or more modular isolators is arranged between the receiver and transmitter sections. The modular isolators comprise a high tensile strength while also providing for a high wave attenuation level. The modular isolators are mechanical mass-spring systems capable of absorbing acoustic waves propagating along the logging tool. The mass is a swinging sleeve, and the spring includes a Belleville spring stack. The use of the strong modular isolators provides acoustic isolation between the transmitters and receivers for the complete sonic frequency band at multiple modes.

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