US PATENT SUBCLASS 166 / 143
.~.~ Central conduit detachable

Current as of: June, 1999
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166 /   HD   WELLS

179  DF  PACKERS OR PLUGS {17}
142  DF  .~ With controllable passage between central chamber and space below packer {7}
143.~.~ Central conduit detachable {1}
144  DF  .~.~.~> Bottom supported casing or screen section

DEFINITION

Classification: 166/143

(under subclass 142) Devices in which the central conduit is adapted to be readily detachable from the packer while in the well by means of a connection such that either the packer or conduit may be left in the well while the other member is completely withdrawn from the well.

SEE OR SEARCH THIS CLASS, SUBCLASS:

123+, for devices as defined in subclass 143 in which there are also expansible anchor means.

158, for a screen with a jetting or washing point or shoe and a detachable jet or wash pipe.

181+, for packers or plugs with detachable setting means.