US PATENT SUBCLASS 166 / 242.1
CONDUIT WALL OR SPECIFIC CONDUIT END STRUCTURE

Current as of: June, 1999
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166 /   HD   WELLS

242.1CONDUIT WALL OR SPECIFIC CONDUIT END STRUCTURE {7}
242.2  DF  .~> Flexible tube or cable
242.3  DF  .~> Plural, parallel, nonconcentric conduits
242.4  DF  .~> Corrosion prevention or deterring
242.5  DF  .~> Side entry
242.6  DF  .~> Downhole coupling or connector {1}
242.8  DF  .~> Shoe detail
242.9  DF  .~> Brick or cement casing liner

DEFINITION

Classification: 166/242.1

CONDUIT WALL OR SPECIFIC CONDUIT END STRUCTURE:

(under the class definition) Apparatus comprising (a) a particular modification to a pipe through the thickness or (b) means at the end of a conduit for facilitating entry of the conduit into the well (e.g., casing shoes).

(1) Note. Claims to a plurality of well conduits may be classified here, but conduits with attachments thereon other than shoes are classified in subclass 243 or other subclasses according to the features claimed.

(2) Note. Couplings for conduit sections are considered parts of the conduit wall structure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

227+, for conduit structure comprising or combined with a screen or filter.

SEE OR SEARCH CLASS

138, Pipes and Tubular Conduits, 100+, for pipe structure of general utility.