US PATENT SUBCLASS 73 / FOR 102
.~ Formation logging (73/152)

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

FOR 100  DF  BORE HOLE AND DRILLING STUDY (73/151) {3}
FOR 102.~ Formation logging (73/152) {2}
FOR 103  DF  .~.~> By drill mud or core analyst (73/153)
FOR 104  DF  .~.~> Thermal (73/154)

DEFINITION

Classification: 73/FOR.102

Foreign art collection for strata identification, as by bore hole studies of pressure derivatives or of pressure-temperature derivatives, etc.