Apparatuses and methods for measuring ultrasonic velocities in m

Details Apparatuses and methods for measuring ultrasonic velocities in m Apparatuses and methods for measuring ultrasonic velocities in m

1991-03-19

1993-11-30

Williams, Hezron E.

Measuring and testing

With fluid pressure

Porosity or permeability

73594, 73597, 73 73, 73794, G01N 2918, G01N 2922

Patent

active

052654613

ABSTRACT:
Methods and apparatuses for measuring ultrasonic velocities in materials are disclosed which, in one embodiment, include such methods and apparatuses for triaxial tests of low permeability rock samples, the apparatus including top and bottom end caps for mounting to a sample to be tested, each end cap having an ultrasonic transducer mounted therein for disposition in contact with the material to be tested for measuring the velocities of ultrasonic waves through the material. In another embodiment, at least one end cap having channels and a sensor for sensing changes in sample pore pressure is disclosed. In another aspect, a pressure generator or microaccumulator for changing the amount of a pore pressure fluid in the channels, thereby changing sample water content and making possible an efficient multistage test is disclosed. In another embodiment an end cap for such measurements is disclosed.

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