US PATENT SUBCLASS 367 / 25
.~ Well logging

Current as of: June, 1999
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367 /   HD   COMMUNICATIONS, ELECTRICAL: ACOUSTIC WAVE SYSTEMS AND DEVICES

14  DF  SEISMIC PROSPECTING {4}
25.~ Well logging {6}
26  DF  .~.~> Threshold set system
27  DF  .~.~> Time interval measurement
28  DF  .~.~> Amplitude measurement {4}
33  DF  .~.~> Depth recording or control
34  DF  .~.~> Received signal cycle discrimination
35  DF  .~.~> Borehole or casing condition

DEFINITION

Classification: 367/25

Well logging:

(under subclass 14) Subject matter wherein the deflected acoustic waves are detected by means which travels through a passageway in the earth.

SEE OR SEARCH CLASS

73, Measuring and Testing,

152.01+, for a well logging, per se, wherein the logging is not a purely electrical test or a purely magnetic test, especially subclasses 152.02+ for a process or an apparatus for borehole formation logging wherein the logging is not a purely electrical test or a purely magnetic test.