US PATENT SUBCLASS 166 / 332.5
.~.~ Valving means inserted or retrieved to operate

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}
332.5.~.~ Valving means inserted or retrieved to operate

DEFINITION

Classification: 166/332.5

Valving means inserted or retrieved to operate:

(under subclass 332.1) Longitudinally moveable operator wherein the flow regulating device is placed in the well or removed from the well to control fluid flow.