Acoustic Isolators
AssigneeSchlumberger Technology Corporation
InventorsHitoshi Sugiyama, Yoshino Sakata
Life of this patent
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Abstract
Acoustic isolators are disclosed herein. An example apparatus includes a transmitter to transmit an acoustic signal. The example apparatus also includes an acoustic isolator substantially surrounding a receiver, and the receiver is to receive the acoustic signal via an opening in the acoustic isolator. The transmitter and the acoustic isolator are coupled to a base. The acoustic isolator includes a first layer coupled to a second layer defining a plurality of spaces. The second layer is to provide an acoustic impedance mismatch.
Claims20
An apparatus, comprising:
- a transmitter to transmit an acoustic signal;
- an acoustic isolator substantially surrounding a receiver, the acoustic isolator having a first layer coupled to a second layer defining a plurality of spaces, the second layer to provide an acoustic impedance mismatch, wherein the receiver is to receive the acoustic signal via an opening in the acoustic isolator;
- and
- a base, wherein the acoustic isolator and the transmitter are coupled to the base.
An apparatus, comprising:
- an acoustic transmitter coupled to a base;
- an acoustic isolator coupled to the base, the acoustic isolator including a first layer and a second layer, the first layer including a plurality of pores;
- an acoustic receiver coupled to the acoustic isolator, wherein the acoustic isolator is to surround a portion of the acoustic receiver;
- and
- an acoustic attenuator coupled to the base, the acoustic attenuator disposed between the acoustic isolator and the acoustic transmitter.
An apparatus comprising;
- a downhole tool;
- and
- an acoustic logging module disposed on the downhole tool, the acoustic logging module including an acoustic transmitter, an acoustic receiver, and an acoustic isolator surrounding a portion of the acoustic receiver, the acoustic isolator having a layer to provide an acoustic impedance mismatch, the layer defining a plurality of spaces.
Dependencies are inferred from the claim text.