US PATENT SUBCLASS 166 / 252.1
.~.~ Including production of earth fluid by driving fluid

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.~.~ Including production of earth fluid by driving fluid {5}
252.2  DF  .~.~.~> Residual oil or oil saturation
252.3  DF  .~.~.~> Salinity or acidity
252.4  DF  .~.~.~> Flood front
252.5  DF  .~.~.~> Permeability or viscosity
252.6  DF  .~.~.~> And tracing material

DEFINITION

Classification: 166/252.1

Including production of earth fluid by driving fluid:

(under subclass 250.01) Indicating in which liquid or gas in the pores of the formation, before the start of the process, is caused to be pushed towards a well by another liquid or gas for flowing to the surface of the earth.

SEE OR SEARCH THIS CLASS, SUBCLASS:

251.1, for an in situ combustion process involving indicating, testing, measuring or locating.

268+, for a process of flooding.