(under subclass 152.54) Subject matter wherein the determination of the physical characteristic of the borehole, the casing, or the drill rigging is made by measuring a property of a liquid, a gas, or a suspension of a solid in a
liquid or a gas.
SEE OR SEARCH THIS CLASS, SUBCLASS:
19.01+, for measuring the gas content of a liquid or a solid, per se.
28.01, for measuring the solid content of a gas, per se.
73+, for measuring the moisture content of a material, per se.
152.28, for sampling and downhole fluid flow measuring in a borehole while drilling is not taking place.
290+, for measuring liquid level, per se. SEE OR SEARCH CLASS
324, Electricity: Measuring and Testing,
204, for testing magnetic fluid material, subclasses 425+ for measuring electrolytic properties of a fluid, and subclasses 600+ for measuring a property of a fluid material by measuring an impedance or an impedance- related quantity.
422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,
68.1+, for fluid analysis involving a chemical reaction.
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.
