US PATENT SUBCLASS 166 / 272.5
.~.~.~.~ With override zone, diverting, or path blocking operation

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}
272.1  DF  .~.~ Involving the step of heating {4}
272.3  DF  .~.~.~ Steam as drive fluid {2}
272.5.~.~.~.~ With override zone, diverting, or path blocking operation

DEFINITION

Classification: 166/272.5

With override zone, diverting, or path blocking operation:

(under subclass 272.3) Steam drive including a bypassing, redirecting, or plugging operation.