COILED TUBING WITH IMPROVED FATIGUE RESISTANCE AND METHOD OF MANUFACTURE

New methods of manufacturing coiled tubing result in increased useful life of the coiled tubing string by creating an enhanced strip-to-strip weld zone (910) having load bearing and/or fatigue resistance properties substantially equal to or greater than the load bearing and/or fatigue resistance pro...

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Bibliographische Detailangaben
Hauptverfasser:	DANIEL, DAVID L, ELLIOTT, KEVIN J, HARGIS, CLAYTON D, DENNIS, DANNY J, VAN ARNAM, WILLIAM D., III
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL BLASTING CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ENGINEERING ELEMENTS AND UNITS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MACHINE TOOLS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS PIPES PUNCHING METAL SOLDERING OR UNSOLDERING SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	New methods of manufacturing coiled tubing result in increased useful life of the coiled tubing string by creating an enhanced strip-to-strip weld zone (910) having load bearing and/or fatigue resistance properties substantially equal to or greater than the load bearing and/or fatigue resistance properties of the strip base material. The enhanced weld zone (910) is transition (914, 915) into the nominal tubing to reduce stress concentration. L'invention porte sur de nouveaux procédés de fabrication de tubes spiralés qui ont pour résultat un allongement de la durée de vie de la rame de tubes spiralés, lequel est obtenu par la création d'une zone de soudure entre bandes renforcée (910) qui possède des propriétés de résistance à la charge et/ou de résistance à la fatigue sensiblement égales ou supérieures aux propriétés de résistance à la charge et/ou de résistance à la fatigue de la matière de base de la bande. La zone de soudure renforcée (910) est la transition (914, 915) introduite dans le tube nominal pour réduire la concentration de contraintes.