US PATENT SUBCLASS 324 / 356-- .~.~.~.~ While drilling

US PATENT SUBCLASS 324 / 356
.~.~.~.~ While drilling

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

323	DF	OF GEOPHYSICAL SURFACE OR SUBSURFACE IN SITU {7}
347	DF	.~ Using electrode arrays, circuits, structure, or supports {2}
354	DF	.~.~ Coupled to artificial current source {2}
355	DF	.~.~.~ Within a borehole {1}
356		.~.~.~.~ While drilling

DEFINITION

Classification: 324/356

While drilling:

(under subclass 355) Subject matter associated with a drill string so that measurements can be carried out during drilling of the borehole.

SEE OR SEARCH THIS CLASS, SUBCLASS:

368, for borehole logging while drilling devices having separate pickup means.

SEE OR SEARCH CLASS

73, Measuring and Testing,

152.03+, 152.19+, and 152.43+ for an apparatus or a process for borehole testing during drilling, per se, wherein the test is not made by purely electrical means or by purely magnetic measuring means.