.~.~> Perforating, weakening or separating by mechanical means or abrasive fluid
DEFINITION
Classification: 166/297
(under subclass 244.1) A process comprising forming a hold, weakening a localized portion, bending or separating portions of a pipe at any suitable location which has not previously been prepared to make it easier to operate on.
(1) Note. The earth wall of the well or a cake left on the formation by circulating fluid while drilling a bore is not considered a pipe wall, but a cementitious wall of a well conduit made by the process defined in subclass 285 or made above ground is considered a pipe wall.
(2) Note. In processes relating to an above ground location some significant well feature should be present for classification in this subclass, but for processes taking place below ground a disclosure line is followed except for those processes provided for in other classes.
(3) Note. The term "bending" in this definition is limited to bending which causes a change in the direction of the longitudinal axis of the pipe. Processes involving expanding a pipe wall may be found in subclasses 277 and 315.
SEE OR SEARCH THIS CLASS, SUBCLASS:
55+, for devices for perforating, weakening, bending or separating a well pipe at an unprepared location.
SEE OR SEARCH CLASS 72, Metal Deforming,
367.1+, for processes of tube making and/or reshaping which may be disclosed as for use in a well.
83, Cutting,
13+, for cutting methods in general, and particularly subclass 54, indented thereunder, for a method of cutting the wall of a hollow workpiece.
175, Boring or Penetrating the Earth,
2+, for processes of firing a bullet or exploding a shaped charge from an inaccessible bore for perforating a wall member in the bore if the process inherently result in penetration of the formation.
