US PATENT SUBCLASS 166 / 290
.~.~ By tubing which is subsequently lifted

Current as of: June, 1999
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166 /   HD   WELLS

244.1  DF  PROCESSES {39}
285  DF  .~ Cementing, plugging or consolidating {7}
290.~.~ By tubing which is subsequently lifted

DEFINITION

Classification: 166/290

(under subclass 285) A process comprising placing the cementing, plugging or consolidating composition by means of a well tubing, the lower end of which is lifted from the level at which the composition is placed, after placement.