Acoustic signal transmitter for logging tools

Details Acoustic signal transmitter for logging tools Acoustic signal transmitter for logging tools

1989-03-06

1991-12-03

Kyle, Deborah L.

Acoustics

Geophysical or subsurface exploration

Well logging

181106, 181113, 367174, 367912, G01V 140

Patent

active

050693077

ABSTRACT:
An acoustic signal transmitter for well logging tools and the like comprising a housing having a generally rectangular opening formed therein and defining a fluid filled cavity in which a compliant sheet transmitter member is disposed and is provided in a relaxed condition with a curvature. Opposite ends of the transmitter member are connected to piezoelectric actuators which are responsive to an electrical signal to elongate to stretch the sheet into a generally planar state to generate a pressure pulse in the cavity for transmission through a fluid filled borehole to a formation for, preferably, measuring the shear wave velocity in the formation material.

REFERENCES:
patent: 4649525 (1987-03-01), Angona et al.
patent: 4869349 (1989-09-01), Minear et al.
patent: 4894811 (1990-01-01), Porzio

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