US PATENT SUBCLASS 166 / 254.2
.~.~.~ Well logging


Current as of: June, 1999
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166 /   HD   WELLS

244.1  DF  PROCESSES {39}
250.01  DF  .~ With indicating, testing, measuring or locating {21}
254.1  DF  .~.~ Determining position of earth zone or marker {1}
254.2.~.~.~ Well logging


DEFINITION

Classification: 166/254.2

Well logging:

(under subclass 254.1) Determining position of earth zone which includes the step(s) of using a wireline operated device to traverse the formation.

(1) Note. The logging step must be explicitly recited in a claim for classification in this subclass and not left to inference. The position of a portion of the earth is almost always determined at some stage in processes involving wells.

SEE OR SEARCH CLASS

73, Measuring and Testing,

152.02+, for formation logging.

324, Electricity: Measuring and Testing,

323+, for a method or apparatus for geophysical surface or subsurface in situ.