US PATENT SUBCLASS 73 / 152.02
.~ Formation logging (e.g., borehole studies of pressure derivatives or of pressure-temperature derivatives)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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.~ Formation logging (e.g., borehole studies of pressure derivatives or of pressure-temperature derivatives) {8}
152.03  DF  .~.~> During drilling {1}
152.05  DF  .~.~> Density, porosity, or permeability {2}
152.08  DF  .~.~> Oil, gas, or water saturation {1}
152.11  DF  .~.~> By a core sample analysis
152.12  DF  .~.~> Thermal {1}
152.14  DF  .~.~> With radioactivity measuring {1}
152.16  DF  .~.~> With vibration measuring
152.17  DF  .~.~> With detail of a borehole wall engaging means

DEFINITION

Classification: 73/152.02

Formation logging (e.g., borehole studies of pressure derivatives or of pressure-temperature derivatives):

(under subclass 152.01) Subject matter wherein the determination of the physical characteristic of earth both below the surface of the earth and along a surface forming the periphery of the borehole is made by measuring a parameter at plural positions within the borehole.

(1) Note. This subclass generally contains subject matter drawn to the measurement of plural kinds of parameters of a formation in a borehole. However, the measurement of a single kind of parameter at plural positions within a borehole, not provided for elsewhere, is also found here. When two parameters of the formation are being measured and one of the parameters is the depth at which a second parameter is being measured, then the subject matter is found where the second parameter is found.

(2) Note. Generally, the devices included here include a process or an apparatus for correlating the measurement of the physical characteristic of the earth with a measured depth.

SEE OR SEARCH THIS CLASS, SUBCLASS:

152.24, for a flow study involving taking a sample from a formation wall.

152.44, for the identification of a formation from the relative ease with which a drill penetrates the formation.

SEE OR SEARCH CLASS 33, Geometrical Instruments, appropriate subclasses for instruments, per se, for measuring a distance, an angle, or the like in a well, and in particular

302, and 304+ for borehole direction or inclination indicators.

181, Acoustics,

102+, for well logging wherein acoustical waves are transmitted or received for the purpose of identifying geologic or subsurface structure.

324, Electricity: Measuring and Testing,

366+, for well logging involving measuring electrical properties of earth formations in a well bore.

356, Optics: Measuring and Testing, appropriate subclasses for borehole study by measuring visible light.

364, Electrical Computers and Data Processing Systems,

422+, for an application of electrical computers and data processing to well logging wherein details of the computer or the data processing system combined with only a nominally recited sensor are recited.

367, Communications, Electrical: Acoustic Wave Systems and Devices,

25+, for utilizing traveling stresses in the earth which are detected or generated by electric signal handling means wherein the electric signal represents communicated information or intelligence regarding a characteristic or location of discontinuities in a formation in a borehole. 374, Thermal Measuring and Testing,

136, for measuring temperature at a single location in a well bore.

435, Chemistry: Molecular Biology and Microbiology,

9, for a process for quantitative or qualitative testing for mineral deposits within a borehole formation by use of enzymes or microorganisms which thrive in the presence of such minerals.

436, Chemistry: Analytical and Immunological Testing,

25+, for a chemical analysis of a borehole formation.