US PATENT SUBCLASS 73 / 152.12
.~.~ Thermal

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}
152.12.~.~ Thermal {1}
152.13  DF  .~.~.~> With heating or cooling

DEFINITION

Classification: 73/152.12

Thermal:

(under subclass 152.02) Subject matter wherein the determination of the physical characteristic of the borehole is made by (a) measuring temperature at plural positions within the borehole or (b) measuring temperature related parameters at plural positions within the borehole.

SEE OR SEARCH CLASS

374, Thermal Measuring and Testing,

10+, for temperature gradient measuring, per se; subclasses 29+ for heat flux measuring, per se; subclasses 45+ for thermal testing of a nonthermal property, per se; and subclass 136 for temperature measuring in a well bore wherein no more than one temperature measurement in a well bore is made and no other parameter of the strata or the well bore is measured.