US PATENT SUBCLASS 73 / 152.04
.~.~.~ By drill mud analysis

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

152.01  DF  BOREHOLE OR DRILLING (E.G., DRILL LOADING FACTOR, DRILLING RATE, RATE OF FLUID FLOW) {6}
152.02  DF  .~ Formation logging (e.g., borehole studies of pressure derivatives or of pressure-temperature derivatives) {8}
152.03  DF  .~.~ During drilling {1}
152.04.~.~.~ By drill mud analysis

DEFINITION

Classification: 73/152.04

By drill mud analysis:

(under subclass 152.03) Subject matter wherein mud is continuously circulated into and out of a borehole and a determination of the physical characteristic of the borehole is made by measuring a condition of, a constituent of, or a composition of the mud while the mud is being circulated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

19.09, for determining the amount of gas in mud, per se.

61.41+, for the analysis of mud, per se.

SEE OR SEARCH CLASS

166, Wells, for well mud sampling per se.

250, Radiant Energy,

253+, for an apparatus or a method of testing drilling mud by measuring invisible radiant energy. 324, Electricity: Measuring and Testing,

324+, for a purely electrical measurement of a borehole fluid, subclass 356 for measuring an electrical property in a borehole while drilling, subclass 369 for well logging while drilling wherein an electrical property of an earth formation

is measured, and subclass 694 for measuring resistance or conductance in order to determine water content.

356, Optics: Measuring and Testing, appropriate subclass for drilling mud analysis by measuring visible light.

364, Electrical Computers and Data Processing Systems,

509+, for the application of an electrical computer or data processing for testing drilling mud wherein computer apparatus detail or data processing combined with only a nominally recited sensor are recited.

378, X-Ray or Gamma Ray Systems or Devices, appropriate subclass for testing drilling mud by measuring a property of an X-ray or a gamma ray.

422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,

68.1, for a chemical apparatus for analyzing a drilling mud involving a chemical reaction.

435, Chemistry: Molecular Biology and Microbiology,

9, for a process for quantitative or qualitative testing for mineral deposits by detecting microorganisms which thrive in the presence of such minerals.

436, Chemistry: Analytical and Immunological Testing, 25+, for chemical testing of fluids within a borehole, especially subclasses 29+ for petroleum oils or carbonaceous minerals and subclass 30 for testing drilling mud.