METHOD FOR EXTENDING THE LIFE OF THIN WALLED TUBING AND AUSTEMPERED WELD STRESS RELIEVED THIN WALLED TUBING

The present invention is directed to a method of extending the life of thin walled tubing by austempering the tubing in a controlled continuous run process involving heating, quenching, and cooling the tubing pursuant to predetermined process parameters. The invention is also directed to a process f...

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Bibliographische Detailangaben
1. Verfasser:	BENSON, DAN, THOMAS
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ALLOYS CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The present invention is directed to a method of extending the life of thin walled tubing by austempering the tubing in a controlled continuous run process involving heating, quenching, and cooling the tubing pursuant to predetermined process parameters. The invention is also directed to a process for austempering tubing having a welded seam and for relieving residual stress in the weld. The invention is further directed to the product of the above processes as well as an austermpered weld stress relieved thin walled tubing and such tubing in combination with other apparatus with which it is suitable for use in the production of hydrocarbons. L'invention concerne un procédé permettant de prolonger la durée de vie d'un tube à paroi mince par soumission du tube à un traitement étagé bainitique dans un processus continu commandé faisant intervenir des étapes de chauffage, de trempage, et de refroidissement du tube selon des paramètres de processus prédéterminés. L'invention concerne également un processus permettant de soumettre à un traitement étagé bainitique un tube présentant un joint soudé et de relaxer les contraintes résiduelles dans la soudure. L'invention concerne en outre le produit obtenu selon lesdits processus ainsi que ledit tube à paroi mince à relaxation de contrainte de soudure soumis à un traitement étagé bainitique et ledit tube employé avec un autre appareil à utiliser dans la production d'hydrocarbures.