US PATENT SUBCLASS 73 / 152.13
.~.~.~ With heating or cooling

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

DEFINITION

Classification: 73/152.13

With heating or cooling:

(under subclass 152.12) Subject matter including means to alter a temperature and wherein (a) the temperature altering means changes a temperature of the apparatus for making the determination of the physical characteristic of the formation or (b) the apparatus for making the determination of the physical characteristic of the formation within the borehole alters the temperature of the borehole.