Forge welding of heavy duty tubulars

Details Forge welding of heavy duty tubulars Forge welding of heavy duty tubulars

B - Operations, Transporting

23

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B23K 13/02 (2006.01) B23K 13/00 (2006.01) B23K 13/04 (2006.01) B23K 13/06 (2006.01) B23K 20/00 (2006.01) B23K 20/02 (2006.01) B23K 20/14 (2006.01) B23K 33/00 (2006.01)

Patent

CA 2492479

A method of joining heavy duty oilfield, well, or other tubulars comprises joining the tubulars by forge welding and flushing a reducing flushing gas around the heated tubular ends during at least part of the forge welding operation such that oxides are removed from the forge welded tubular ends and the amount of oxide inclusions and irregularities between the forge welded tubular ends is limited. The tubular ends may have a teethed or non-planar shape to inhibit any abrupt variations of the wall strength in the welding area and/or to reduce shear forces to the forge weld when the tubulars are twisted and/or radially expanded.

L'invention concerne un procédé d'assemblage de matériaux tubulaires lourds pour forage, puits ou autres, qui consiste à rattacher les matériaux tubulaires par soudage par forgeage et jet d'un gaz de lavage réducteur autour des extrémités des matériaux tubulaires pendant au moins une partie de l'opération de soudage par forgeage, de sorte que les oxydes soient enlevés desdites extrémités, ce qui limite la quantité d'inclusions d'oxyde et d'aspérités entre les extrémités des matériaux tubulaires soudées par forgeage. Les extrémités des matériaux tubulaires présentent une forme dentée ou non planaire qui empêche toutes variations brusques de la résistance des parois dans la zone de soudage, et/ou diminue les forces de cisaillement appliquées sur la soudure lorsque les matériaux tubulaires sont torsadés et/ou expansés radialement.

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