US PATENT SUBCLASS 166 / 242.8
.~ Shoe detail


Current as of: June, 1999
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166 /   HD   WELLS

242.1  DF  CONDUIT WALL OR SPECIFIC CONDUIT END STRUCTURE {7}
242.8.~ Shoe detail


DEFINITION

Classification: 166/242.8

Shoe detail:

(under subclass 242.1) End structure comprising the particular shape, design, construction, or configuration of the means at the terminus of a conduit for facilitating entry of the conduit into the well (e.g., cementing shoes).

SEE OR SEARCH THIS CLASS, SUBCLASS:

156, for casing shoes with stop means for pistons, fluid driven into the well.

157+, for screens with a washing point or shoe.

203, for conduit shoes specifically formed and claimed as packers.

222+, for shoes with nozzles for whirling or lateral discharge or projectable nozzles.

316+, for conduits with valves, closures or changeable restrictors, especially subclasses 327+ for shoes with check valves.

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

402, for casing shoe type earth cutting bits.