US PATENT SUBCLASS 166 / 289
.~.~ Discharging cement from casing at different levels


Current as of: June, 1999
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166 /   HD   WELLS

244.1  DF  PROCESSES {39}
285  DF  .~ Cementing, plugging or consolidating {7}
289.~.~ Discharging cement from casing at different levels


DEFINITION

Classification: 166/289

(under subclass 285) A process in which cementing, plugging or consolidating material is caused to issue from a single string of well casing at a plurality of levels.

(1) Note. A group of substantially evenly spaced perforations in a casing out of which cementing, plugging or consolidating material may issue is considered a single level rather than a plurality of levels.

SEE OR SEARCH THIS CLASS, SUBCLASS:

269, for a process involving input and output walls and fluid injected into the earth from different levels in an injection well.