US PATENT SUBCLASS 166 / 132
.~.~ Portion extends beyond end of surrounding conduit

Current as of: June, 1999
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166 /   HD   WELLS

179  DF  PACKERS OR PLUGS {17}
118  DF  .~ With expanding anchor {12}
132.~.~ Portion extends beyond end of surrounding conduit

DEFINITION

Classification: 166/132

(under subclass 118) Devices wherein the anchoring means is prevented from expanding till the device or a part thereof passes beyond the end of the surrounding well conduit.