US PATENT SUBCLASS 166 / 206
EXPANSIBLE ANCHOR OR CASING

Current as of: June, 1999
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166 /   HD   WELLS

206EXPANSIBLE ANCHOR OR CASING {8}
207  DF  .~> Expansible casing
208  DF  .~> Liner hanger
209  DF  .~> Set by wedge or cam at any point by drop only (e.g., tubing catcher) {2}
212  DF  .~> Fluid pressure actuated
213  DF  .~> Bowed anchor means
214  DF  .~> Spring set {1}
216  DF  .~> With wedge or cam and friction drag
217  DF  .~> Expansible means translated by wedge or cam

DEFINITION

Classification: 166/206

(under the class definition) Devices comprising (1) a means attached to a member which is run into a well conduit already in fixed position in the well, the means being movable outwardly to engage and jam against the surrounding conduit wall or to interlock in a preformed recess in the conduit, the means functioning to attach the member to the conduit in the well so as to resist action of gravity or a lifting force or (2) a section of casing which is expansible in the well.

(1) Note. The outwardly movable means usually have teeth that bite into the surrounding conduit wall and serve to fix the device in the well conduit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

174, for expansible brushing or scraping cleaners.

179+, for expansible packers or plugs.

241, for devices which frictionally engage or press against the wall of a surrounding conduit and offer some resistance to longitudinal movement but are not interlocked with or jammed against the wall of the conduit to form an anchor.

SEE OR SEARCH CLASS 175, Boring or Penetrating the Earth,

98+, for an earth boring means having a below ground drive motor with an expansible bore wall engaging anchor, subclass 230 for other earth boring apparatus with an expanding bore wall engaging anchor and subclasses 263+ for earth boring cutter elements which are laterally shiftable (e.g., expansible) below ground.

285, Pipe Joints or Couplings,

123.3+, for joints between concentric pipes not established below ground level in a well as provided for in Class 166, subclass 206.

294, Handling: Hand and Hoist-Line Implements,

86.24+, for internally expanding well grapples, and subclasses 93+ for internally expanding grapples of general utility. Sole disclosure of, or a statement in a claim of use as a grapple is enough for classification Class 294.

299, Mining or In Situ Disintegration of Hard Material,

20+, for an expansible breaking down device for hard material in situ which may be structurally similar to an anchor.

417, Pumps, appropriate subclasses for well pumps with expanding anchor means where there is only a nominal recitation of a pump, pump barrel or tubing in a claim to a device including an expanding anchor classification is in Class 166 in this or indented subclasses.