.~.~ 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.
