US PATENT SUBCLASS 436 / 30
.~.~ Removing and testing drilling mud or fluid

Current as of: June, 1999
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436 /   HD   CHEMISTRY: ANALYTICAL AND IMMUNOLOGICAL TESTING

25  DF  GEOCHEMICAL, GEOLOGICAL, OR GEOTHERMAL EXPLORATION {4}
29  DF  .~ For petroleum oils or carbonaceous minerals {2}
30.~.~ Removing and testing drilling mud or fluid

DEFINITION

Classification: 436/30

Removing and testing drilling mud or fluid:

(under subclass 29) Processes or compositions wherein drilling mud or drilling fluid is chemically analyzed.

SEE OR SEARCH CLASS

73, Measuring and Testing,

152.04, for drill mud analysis and subclasses 152.23+ for a process or an apparatus for fluid flow measuring or fluid analysis combined with sampling wherein neither the analysis nor the measuring is of a purely electrical type or of a purely magnetic type.