US PATENT SUBCLASS 702 / 9
.~.~.~ Drilling

Current as of: June, 1999
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702 /   HD   DATA PROCESSING: MEASURING, CALIBRATING, OR TESTING

1  DF  MEASUREMENT SYSTEM IN A SPECIFIC ENVIRONMENT {6}
2  DF  .~ Earth science {4}
6  DF  .~.~ Well logging or borehole study {5}
9.~.~.~ Drilling

DEFINITION

Classification: 702/9

Drilling:

(under subclass 6) Subject matter including borehole equipment having a movable tool for penetrating through the subterranean formations of the earth to make a long cylindrical hollow to obtain particular parameters of interest.

(1) Note. This subclass includes measuring-while-drilling (MWD) apparatus in which measurements are received during drilling.

SEE OR SEARCH CLASS

73, Measuring or Testing,

152.03, for formation logging during drilling, and subclasses 152.43+ for measuring and testing during drilling.

166, Wells,

250.01+, for well processes which include indicating, testing, measuring, or locating, and subclass 66 for well apparatus including electrical signaling means. 175, Boring or Penetrating the Earth,

40+, for a process or means of measuring combined with an earth boring means.