US PATENT SUBCLASS 166 / 313
.~ Parallel string or multiple completion well


Current as of: June, 1999
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166 /   HD   WELLS

244.1  DF  PROCESSES {39}
313.~ Parallel string or multiple completion well


DEFINITION

Classification: 166/313

(under subclass 244.1) A process comprising (1) the use of plural well conduits which extend from the ground surface substantially to or past a producing formation, the conduits being positioned side by side rather than one within the other, or (2) producing fluid from vertically spaced zones in the well.

(1) Note. A conduit which extends alongside another conduit and which is intended to be used only for servicing the other conduit as by furnishing lifting gas is not considered a well conduit for part (1) of the definition. Processes using such conduits are classified on other features.

(2) Note. A patent is classified as an original in this definition under part (1) if conduits are referred to in a claim and they are disclosed as positioned side by side and not one within another even though no claim recites the side by side feature.

(3) Note. The vertically spaced zones may be nothing more than spaced groups of perforations receiving fluid from a single producing zone but usually the vertically spaced zones are for producing fluid from spaced formations.

SEE OR SEARCH THIS CLASS, SUBCLASS:

189, for a packer for non concentric conduits.

258, for a process of producing fluid from distinct formations by in situ combustion. 269, for a process of producing fluid from spaced formations by driving fluid through the formations from an adjacent well and desirably distributing the driving fluid through the formations.

306, for a process in which fluid leaves a well and fluid enters a well from spaced zones.