US PATENT SUBCLASS 166 / 252.5
.~.~.~ Permeability or viscosity

Current as of: June, 1999
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166 /   HD   WELLS

244.1  DF  PROCESSES {39}
250.01  DF  .~ With indicating, testing, measuring or locating {21}
252.1  DF  .~.~ Including production of earth fluid by driving fluid {5}
252.5.~.~.~ Permeability or viscosity

DEFINITION

Classification: 166/252.5

Permeability or viscosity:

(under subclass 252.1) Production of earth fluid by driving fluid including step(s) of determining a measure of the ease with which a fluid can flow through a formation or a property of a fluid that causes the fluid to tend to hold together as during flow.