EP 2143817 A2 20100113 - A SEAMLESS STEEL TUBE FOR WORK-OVER RISER AND METHOD OF MANUFACTURING
Title (en)
A SEAMLESS STEEL TUBE FOR WORK-OVER RISER AND METHOD OF MANUFACTURING
Title (de)
NAHTLOSES STAHLROHR FÜR AUFWÄLTIGUNGSSTEIGROHR UND HERSTELLUNGSVERFAHREN
Title (fr)
TUBE D'ACIER SANS SOUDURE UTILISÉ COMME SECTION VERTICALE DE RECONDITIONNEMENT
Publication
Application
Priority
- MX 2008000054 W 20080417
- MX 2007004600 A 20070417
Abstract (en)
The present invention describes a seamless steel tube for work-over risers comprising in weight per cent, carbon 0.23-0.29, manganese 0.45-0.65, silicon 0.15-0.35, chromium 0.90-1.20, molybdenum 0.70- 0.90, nickel 0.20 max, nitrogen 0.010 max, boron 0.0010-0.0030, aluminum 0.010-0.045, sulfur 0.005 max, phosphorus 0.015 max, titanium 0.005-0.030, niobium 0.020-0.035, copper 0.15 max, arsenic 0.020 max, calcium 0.0040 max, tin 0.020 max, hydrogen 2.4 ppm max, the rest are iron and inevitable impurities, consisting of a geometry in which ends of the tube have an increased wall thickness and outer diameter and having a yield strength of at least of 620 MPa (90 ksi) throughout the whole length of a tube body and in tube ends. The present invention also describes methods for manufacturing a seamless steel tube for work-over risers having a yield strength at least of 620 MPa (90ksi) both in a tube body and in tube ends.
IPC 8 full level
C22C 38/18 (2006.01); C21D 9/08 (2006.01); C22C 38/22 (2006.01); E21B 19/00 (2006.01)
CPC (source: EP US)
C21D 9/08 (2013.01 - EP US); C21D 9/085 (2013.01 - EP US); C22C 38/18 (2013.01 - EP US); C22C 38/22 (2013.01 - EP US); E21B 17/01 (2013.01 - EP US)
Citation (search report)
See references of WO 2008127084A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2143817 A2 20100113; AR 066080 A1 20090722; BR PI0810005 A2 20151027; CA 2682959 A1 20081023; MX 2007004600 A 20081201; NO 20093069 L 20091230; US 2010193085 A1 20100805; WO 2008127084 A2 20081023; WO 2008127084 A3 20081231; WO 2008127084 A4 20090319
DOCDB simple family (application)
EP 08753716 A 20080417; AR P080101566 A 20080416; BR PI0810005 A 20080417; CA 2682959 A 20080417; MX 2007004600 A 20070417; MX 2008000054 W 20080417; NO 20093069 A 20090928; US 59516708 A 20080417