US PATENT SUBCLASS 166 / 140
.~.~.~ Anchor above packer or plug seal

Current as of: June, 1999
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166 /   HD   WELLS

179  DF  PACKERS OR PLUGS {17}
118  DF  .~ With expanding anchor {12}
138  DF  .~.~ Wedge or cam and friction drag {2}
140.~.~.~ Anchor above packer or plug seal

DEFINITION

Classification: 166/140

(under subclass 138) Devices wherein the anchoring means is positioned above the packer or plug blocking portion.

(1) Note. This subclass does not include those devices in which the anchoring means is positioned in the same zone as the packer or plug means so that only part of the blocking portion of the packer or plug is below the anchor. See subclasses 138 and 139 for such devices.