US PATENT SUBCLASS 166 / 270
.~.~ Injecting a composition to adjust the permeability (e.g., selective plugging)

Current as of: June, 1999
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166 /   HD   WELLS

244.1  DF  PROCESSES {39}
268  DF  .~ Distinct, separate injection and producing wells {7}
270.~.~ Injecting a composition to adjust the permeability (e.g., selective plugging)

DEFINITION

Classification: 166/270

Injecting a composition to adjust the permeability (e.g., selective plugging):

(under subclass 268) A process in distinct, separate wells in which the fluid temporarily alters the ease of flow through the formation by filling in the pores for a specific time, usually immediately prior to a hydrocarbon driving fluid.

(1) Note. Included in this subclass are gels.

SEE OR SEARCH THIS CLASS, SUBCLASS:

300, for chemical interaction of two or more introduced materials.