US PATENT SUBCLASS 166 / 116
.~ Surrounding conduit carries packer or plug

Current as of: June, 1999
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166 /   HD   WELLS

115  DF  CENTRAL CHAMBER SEALED WITH RESPECT TO PREPOSITIONED MODIFIED SURROUNDING CONDUIT {1}
116.~ Surrounding conduit carries packer or plug

DEFINITION

Classification: 166/116

(under subclass 115) Devices in which the surrounding conduit carries a packer or plug as defined in subclass 179.