US PATENT SUBCLASS 73 / 152.54
.~ Downhole test

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}
152.54.~ Downhole test {5}
152.55  DF  .~.~> Fluid test
152.56  DF  .~.~> Free point or stuck point
152.57  DF  .~.~> Casing or cementing
152.58  DF  .~.~> Using vibration
152.59  DF  .~.~> By measurement of response due to force

DEFINITION

Classification: 73/152.54

Downhole test:

(under subclass 152.01) Subject matter wherein the apparatus for determination of the physical characteristic of the borehole, the casing, or the drill rigging is located within the borehole while the measurement is being made.

SEE OR SEARCH THIS CLASS, SUBCLASS:

152.28, for sampling and downhole fluid flow measuring in a borehole while not drilling.

152.46, for downhole measuring (a) involving no fluid flow measuring and (b) taking place while drilling is being done.