Dual bias weld for continuous coiled tubing

Details Dual bias weld for continuous coiled tubing Dual bias weld for continuous coiled tubing

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 9/16 (2006.01) B23K 33/00 (2006.01) B21B 15/00 (2006.01)

Patent

CA 2177177

A dual weld for joining strips to be formed into coiled tubing. Tubing is formed from a first strip (15a) and a second strip (15b), the first and second strips of the same width. A planar end surface (Pa) is formed on an end of the strip. Similarly, a planar end surface (Pb) is formed on an end of the second strip. A composite strip is formed by welding the planar end surface of the first strip to the planar end surface of the second strip to form a dual bias weld. Excess-weldment is then removed from top, bottom and edge surfaces of the composite strip such that the width of th weld is identical to the width of the first and second strips. Coiled metal tubing is then formed from the composite strip.

Une soudure à deux découpes obliques permet de joindre des bandes devant être unies pour former un tube spiralé. On forme ce tube à partir de première (15a) et deuxième (15b) bandes, de même largeur. Sur une extrémité de la première bande, on forme une surface terminale plane (Pa). De la même manière, on forme sur une extrémité de la deuxième bande, une surface terminale plane (Pb). On forme une bande composite en soudant la surface terminale plane de la première bande sur la surface terminale plane de la deuxième bande pour former une soudure à deux découpes obliques. On élimine ensuite le surplus de l'ensemble soudé des surfaces supérieures, inférieures et de bord de la bande composite de sorte que la largeur de la soudure corresponde exactement à la largeur des première et deuxième bandes. On peut ensuite former le tube métallique spiralé à partir de cette bande composite.

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