US PATENT SUBCLASS 166 / 55.7
.~.~ Internal

Current as of: June, 1999
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166 /   HD   WELLS

55  DF  MEANS FOR PERFORATING, WEAKENING, BENDING OR SEPARATING PIPE AT AN UNPREPARED POINT {3}
55.6  DF  .~ Cutter rotates circumferentially of pipe {1}
55.7.~.~ Internal {1}
55.8  DF  .~.~.~> Tool moved radially by fluid pressure

DEFINITION

Classification: 166/55.7

(under subclass 55.6) Devices in which the cutting tool is located inside the pipe and advances outwardly for cutting.

SEE OR SEARCH CLASS

30, Cutlery,

103+, for cutters, not disclosed for use in a well, in which the cutting element is rotated internally of a pipe.