US PATENT SUBCLASS 166 / 186
.~.~ Port between sealing portions and bypass around

Current as of: June, 1999
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166 /   HD   WELLS

179  DF  PACKERS OR PLUGS {17}
185  DF  .~ With central conduit and fluid port to space outside {1}
186.~.~ Port between sealing portions and bypass around

DEFINITION

Classification: 166/186

(under subclass 185) Devices in which the port is between spaced packer or plug blocking or sealing means and there is a bypass passage across both spaced means connecting the spaces outside the central conduit with each other.