US PATENT SUBCLASS 166 / 55
MEANS FOR PERFORATING, WEAKENING, BENDING OR SEPARATING PIPE AT AN UNPREPARED POINT

Current as of: June, 1999
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166 /   HD   WELLS

55MEANS FOR PERFORATING, WEAKENING, BENDING OR SEPARATING PIPE AT AN UNPREPARED POINT {3}
55.1  DF  .~> With disparate below ground feature
55.2  DF  .~> Perforating or splitting cutter {1}
55.6  DF  .~> Cutter rotates circumferentially of pipe {1}

DEFINITION

Classification: 166/55

(under the class definition) Devices comprising means for perforating, weakening, bending or separating the side wall of a well pipe at a location in the pipe which has not been specially preconditioned for such action.

(1) Note. A means for merely indicating the location in a pipe at which an operation such as cutting is to be performed is not considered a special preconditioning of the pipe.

(2) Note. The earth wall of the well is not considered a "pipe".

(3) Note. A mere pipe coupling sleeve is not a specially preconditioned location.

(4) Note. A device to fire a bullet or explode a shaped charge to perforate a casing or other wall member in a bore is classified in Class 175, even though there is no disclosure that penetration of the earth occurs.

(5) Note. If the device functions above ground level some significant limitation to the well art should be present for classification under this definition, but if the device functions below ground level a disclosure line prevails, except where there is a body of art in other classes relating to such devices used in a well.

SEE OR SEARCH THIS CLASS, SUBCLASS: 63, for devices involving explosive apparatus similar to that found in subclass 55 but used for penetrating only the formation rather than a pipe or a pipe and the formation.

297+, for processes for perforating, weakening, bending or separating pipe at an unprepared point.

SEE OR SEARCH CLASS

30, Cutlery,

92+, for pipe and rod cutters not disclosed as for use in a

wall.

60, Power Plants,

632+, for one shot explosion actuated expansible chamber type motors.

72, Metal Deforming, appropriate subclass for a pipe deforming means of general utility, including a pipe deforming means described as functioning in a well and particularly

112+, for a tool which orbits or rotates as it operates and subclass 391 for a tool having motion in a fixed path to deform fixed material.

83, Cutting, appropriate subclasses, for method and apparatus for cutting or punching holes in a tubular workpiece.

102, Ammunition and Explosives, 306+, for well torpedoes for breaking up formation, generating seismic sounds or cleaning the bore.

137, Fluid Handling,

317+, for fluid handling devices of general application including means for tapping, boring or drilling a container or main under pressure.

175, Boring or Penetrating the Earth,

2+, for a device for firing a bullet or exploding a shaped charge from an inaccessible bore to penetrate the formation and including such a device even when limited by disclosure to merely perforating or cutting a casing or other wall member in the bore, subclasses 249+ for earth boring apparatus with a core retaining or severing means which is movable relative to a bit and subclasses 263+ for an earth boring cutter element which is laterally shifted below ground.

294, Handling: Hand and Hoist-Line Implements,

86.1+, for means for separating a pipe in a well by a mere grappling action.

408, Cutting by Use of Rotating Axially Moving Tool, appropriate subclasses, for general utility cutting in the manner of that class.