Method and apparatus for cutting patterns through pipe

Details Method and apparatus for cutting patterns through pipe Method and apparatus for cutting patterns through pipe

1983-12-27

1984-11-20

Stallard, W.

Metal treatment

Compositions

Heat treating

266 55, 266 57, B23K 704

Patent

active

044837216

ABSTRACT:
A method and apparatus for cutting a series of patterns spaced along the length of a tubular member (e.g. drill collar). A cutting torch is positioned and manuevered within the bore of the pipe so that all cutting is done in an inside-to-outside direction. All slag formed by the cutting action is blown away from the pipe and does not collect within the pipe bore as in previous cutting operations of this type. Further, since there is no cross-wash of the torch, there is no substantially no heat buildup in the pipe during cutting which allows proper preheating of the pipe thereby alleviating cold cuts in the pattern.

REFERENCES:
patent: 2865625 (1958-12-01), Pauley
patent: 3398804 (1968-08-01), Holbert
patent: 3552731 (1971-01-01), Selkirk
patent: 3572668 (1971-03-01), LeBlanc
patent: 4162383 (1979-07-01), Hamasaki
patent: 4384901 (1983-05-01), Swoboda
patent: 4397360 (1983-09-01), Schmidt

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