Rotating multi-parameter bond tool

Measuring and testing – Borehole or drilling – Downhole test

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Details

73602, 367 35, 181104, 181105, 364422, G01V 152, G01V 146

Patent

active

057637733

ABSTRACT:
A multi-part logging tool that allows measurement of several distinct independent parameters, which are in turn used to solve for secondary parameters that give information about the properties of the cement outside the casing. Secondary parameters affecting the measured signals are: casing thickness, bond of cement to casing, cement acoustic impedance, cement thickness, channel size and channel material. The present invention comprises a rotating tool that supports a plurality of specifically configured transducers that interrogate a region behind casing having a 10 degree azimuthal resolution and a depth of investigation of at least 0.75 inches behind casing. The transducers on the rotating tool include an array of angled beam transducers, a single-housing pitch-catch transducer and a radial, pulse echo transducer.

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patent: 4805156 (1989-02-01), Atali et al.
patent: 5089989 (1992-02-01), Schmidt et al.
patent: 5377160 (1994-12-01), Tello et al.

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