US PATENT SUBCLASS 166 / 332.4
.~.~ Operated by means inserted from the surface

Current as of: June, 1999
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166 /   HD   WELLS

316  DF  VALVES, CLOSURES OR CHANGEABLE RESTRICTORS {5}
332.1  DF  .~ Longitudinally movable operator {8}
332.4.~.~ Operated by means inserted from the surface

DEFINITION

Classification: 166/332.4

Operated by means inserted from the surface:

(under subclass 332.1) Longitudinally moveable operator wherein a tool is inserted into the well from the wellhead to actuate the flow regulating device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

332.2+, for a rotatable valve which could be operated by a tool inserted from the surface.