HIGH-STRENGTH STEEL MATERIAL FOR OIL WELL USE, AND OIL WELL PIPE

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EP 3 026 138 B8

(12)	CORRECTED EUROPEAN PATENT SPECIFICATION
	Note: Bibliography reflects the latest situation

(15)	Correction information:
	Corrected version no 1 (W1 B1)

(48)	Corrigendum issued on:
	21.08.2019 Bulletin 2019/34

(45)	Mention of the grant of the patent:
	08.05.2019 Bulletin 2019/19

(21)	Application number: 14828764.2

(22)	Date of filing: 24.07.2014

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International Patent Classification (IPC):

C22C 38/00^(2006.01)
C22C 38/06^(2006.01)
C22C 38/08^(2006.01)
C22C 38/14^(2006.01)
C22C 38/22^(2006.01)
C22C 38/42^(2006.01)
C22C 38/46^(2006.01)
C22C 38/50^(2006.01)
E21B 17/00^(2006.01)
C22C 38/02^(2006.01)
C21D 6/00^(2006.01)

C21D 8/10^(2006.01)
C22C 38/58^(2006.01)
C22C 38/12^(2006.01)
C22C 38/16^(2006.01)
C22C 38/38^(2006.01)
C22C 38/44^(2006.01)
C22C 38/48^(2006.01)
C22C 38/54^(2006.01)
C22C 38/04^(2006.01)
C21D 8/02^(2006.01)

(86)	International application number:
	PCT/JP2014/069580

(87)	International publication number:
	WO 2015/012357 (29.01.2015 Gazette 2015/04)

(54)	HIGH-STRENGTH STEEL MATERIAL FOR OIL WELL USE, AND OIL WELL PIPE HOCHFESTES STAHLMATERIAL FÜR ÖLBOHRLÖCHER UND ÖLBOHRUNGSROHR MATÉRIAU D'ACIER À GRANDE RÉSISTANCE MÉCANIQUE POUR UTILISATION DANS LES PUITS DE PÉTROLE, ET TUBE POUR PUITS DE PÉTROLE

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

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Priority:

26.07.2013 JP 2013155845

(43)	Date of publication of application:
	01.06.2016 Bulletin 2016/22

(73)	Proprietor: Nippon Steel Corporation
	Tokyo 100-8071 (JP)

(72)	Inventors:
	KOBAYASHI, Kenji Tokyo 100-8071 (JP) TOMIO, Yusaku Tokyo 100-8071 (JP)

(74)	Representative: Zimmermann & Partner Patentanwälte mbB
	Josephspitalstr. 15 80331 München 80331 München (DE)

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References cited: :

WO-A1-2012/092122
JP-A- S6 039 150
JP-A- H04 259 325
JP-A- H07 126 809
JP-A- 2013 023 743
US-A1- 2002 048 529

FR-A1- 2 881 144
JP-A- S6 039 150
JP-A- H04 259 325
JP-A- S58 174 557
JP-A- 2013 023 743

Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).