US PATENT SUBCLASS 73 / 152.18
.~ Fluid flow measuring or fluid 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}
152.18.~ Fluid flow measuring or fluid analysis {6}
152.19  DF  .~.~> During drilling {2}
152.23  DF  .~.~> With sampling {3}
152.29  DF  .~.~> Rate of fluid flow {5}
152.37  DF  .~.~> Steady state fluid flow interruption {1}
152.39  DF  .~.~> Fluid injection into formation {1}
152.42  DF  .~.~> Determining relative proportion of fluid constituent

DEFINITION

Classification: 73/152.18

Fluid flow measuring or fluid analysis:

(under subclass 152.01) Subject matter wherein the determination of the physical characteristic of the borehole, the casing, or the drill rigging is made by either (a) detecting the movement of or the presence of a fluid which has traveled either (1) from the formation into the borehole, (2) from the borehole into the formation, (3) from the outside of the borehole into the borehole, or (d) from inside the borehole to the outside of the borehole; (b) measuring a

rate, a direction, or a magnitude of fluid flow either (1) from the formation into the borehole, (2) from the borehole into the formation, (3) from the outside of the borehole into the borehole, or (4) from inside the borehole to the outside of the borehole, or (c) detecting or measuring the presence of or an amount of a constituent of a fluid within the borehole, the ratio of one constituent of the fluid to another constituent of the fluid or the effect of a constituent of the fluid.

(1) Note. Production indices are included here.

SEE OR SEARCH THIS CLASS, SUBCLASS:

19.1+, for measuring the gaseous content of a liquid.

53.01+, for liquid analysis, per se.

170.01+, for fluid flow direction determination not in a borehole or in a drilling study.

861+, for volume or rate of fluid flow determination, per se. SEE OR SEARCH CLASS

116, Signals and Indicators,

112+, for a mechanical alarm, per se, giving a humanly perceptible signal in response to a predetermined fluid flow and subclasses 264 for a mechanical indicator structure, per se, giving a humanly perceptible signal in response to the presence or absence of fluid flow.

166, Wells, appropriate subclass for the combination of a well structure and fluid flow measuring wherein more well structure is recited than that which is necessary for perfecting the measurement.

175, Boring or Penetrating the Earth,

48, for measurement of or an indication of drilling fluid flow combined with more than a mere boring step or detail of a boring apparatus.

250, Radiant Energy,

253+, for the testing of well fluid by measuring a property of invisible light and subclass 301 for a method of determining oil presence, contamination, or concentration.

324, Electricity: Measuring and Testing,

306, for measuring a rate of fluid flow by subjecting the fluid to magnetic resonance.

340, Communications: Electrical, 603+, for an electrical indicator or alarm providing a humanly perceptible signal in response to a predetermined fluid flow and providing no quantitative measurement.

356, Optics: Measuring and Testing, appropriate subclass for testing fluid by measuring a characteristic of visible light.

364, Electrical Computers and Data Processing Systems,

422, for application of an electrical computer or data processing to borehole logging when significant electrical computer or data processing detail and nominal transducer detail is recited and subclass 510 for application of an electrical computer or data processing to the measurement of flow when significant electrical computer or data processing detail and only nominal sensor detail are recited.

378, X-Ray or Gamma Ray Systems or Devices, appropriate subclass for fluid analysis by measuring a property of X-rays or gamma rays.

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

68.1+, for a chemical apparatus for analyzing a liquid.

435, Chemistry: Molecular Biology and Microbiology,

9, for the detection of the presence of fluids within a borehole by sensing the presence of microorganisms in the vicinity of the fluid.

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.