US PATENT SUBCLASS 324 / 221
.~.~.~ Borehole pipe testing


Current as of: June, 1999
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324 /   HD   ELECTRICITY: MEASURING AND TESTING

200  DF  MAGNETIC {24}
219  DF  .~ Magnetic sensor within material {1}
220  DF  .~.~ Sensor supported, positioned, or moved within pipe {1}
221.~.~.~ Borehole pipe testing


DEFINITION

Classification: 324/221

Borehole pipe testing:

(under subclass 220) Subject matter wherein the tested pipe is a casing or a borehole in the earth.

SEE OR SEARCH THIS CLASS, SUBCLASS:

345, for geological and subsurface testing for materials by a magnetic test.

SEE OR SEARCH CLASS

33, Geometrical Instruments,

302+, for borehole interior study processes, and subclasses 304+ for borehole direction or inclination meters.

73, Measuring and Testing, 152.01+, for borehole and drilling study apparatus.

166, Wells,

64, for time or distance measuring, subclass 65.1 for electrical means combined with a well, and subclasses 250.01+ for processes involving indicating, testing, measuring, or locating within a well.

175, Boring or Penetrating the Earth,

4.51, for boring or penetrating with orienting or indicting.

250, Radiant Energy,

253+, for geological testing or irradiating with radiant energy.

361, Electricity: Electrical Systems and Devices,

248+, for igniting systems for explosive devices within a well bore.

367, Communications, Electrical: Acoustic Wave System and Devices,

14+, for compressional wave geophysical systems, and subclass 86 for well bore electrical communications.

436, Chemistry: Analytical and Immunological Testing, 25+, for geochemical exploration.