EP 1799870 A2 20070627 - METHOD FOR EXTENDING THE LIFE OF THIN WALLED TUBING AND AUSTEMPERED WELD STRESS RELIEVED THIN WALLED TUBING
Title (en)
METHOD FOR EXTENDING THE LIFE OF THIN WALLED TUBING AND AUSTEMPERED WELD STRESS RELIEVED THIN WALLED TUBING
Title (de)
VERFAHREN ZUR VERLÄNGERUNG DER LEBENSDAUER VON DÜNNWANDIGEN ROHREN UND AUSGETEMPERTE SCHWEISSNAHTENTSPANNTE DÜNNWANDIGE ROHRE
Title (fr)
PROCEDE PERMETTANT DE PROLONGER LA DUREE DE VIE D'UN TUBE A PAROI MINCE ET TUBE A PAROI MINCE A RELAXATION DE CONTRAINTE DE SOUDURE SOUMIS A UN TRAITEMENT ETAGE BAINITIQUE
Publication
Application
Priority
- US 2005029896 W 20050822
- US 94357504 A 20040917
Abstract (en)
[origin: US2006060267A1] 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.
IPC 8 full level
C21D 1/42 (2006.01)
CPC (source: EP US)
C21D 1/30 (2013.01 - EP US); C21D 1/42 (2013.01 - EP US); C21D 1/607 (2013.01 - EP US); C21D 9/08 (2013.01 - EP US); Y02P 10/25 (2015.11 - EP US)
Citation (search report)
See references of WO 2006033752A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
US 2006060267 A1 20060323; BR PI0515458 A 20080722; CA 2580462 A1 20060330; EP 1799870 A2 20070627; JP 2008513604 A 20080501; MX 2007003098 A 20070516; NO 20071959 L 20070417; US 2008042327 A1 20080221; WO 2006033752 A2 20060330; WO 2006033752 A3 20080821; ZA 200703074 B 20100127
DOCDB simple family (application)
US 94357504 A 20040917; BR PI0515458 A 20050822; CA 2580462 A 20050822; EP 05790152 A 20050822; JP 2007532345 A 20050822; MX 2007003098 A 20050822; NO 20071959 A 20070417; US 2005029896 W 20050822; US 84609707 A 20070828; ZA 200703074 A 20070416