US PATENT SUBCLASS 166 / 375
.~.~.~ By auxilliary fluid control line

Current as of: June, 1999
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166 /   HD   WELLS

244.1  DF  PROCESSES {39}
373  DF  .~ Operating valve, closure, or changeable restrictor in a well {1}
374  DF  .~.~ Operated by fluid pressure controlled above ground {1}
375.~.~.~ By auxilliary fluid control line

DEFINITION

Classification: 166/375

By auxiliary fluid control line:

(under subclass 374) Process wherein the fluid pressure change which is initiated by an above ground operator is communicated to the flow regulating device by a conduit used exclusively for that purpose.