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1. (WO2007007678) LOW-ALLOY STEEL FOR OIL WELL TUBE HAVING EXCELLENT SULFIDE STRESS CRACKING RESISTANCE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/007678 International Application No.: PCT/JP2006/313590
Publication Date: 18.01.2007 International Filing Date: 07.07.2006
IPC:
C22C 38/00 (2006.01) ,C22C 38/12 (2006.01) ,C22C 38/32 (2006.01)
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
12
containing tungsten, tantalum, molybdenum, vanadium or niobium
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
32
with boron
Applicants:
住友金属工業株式会社 SUMITOMO METAL INDUSTRIES, LTD. [JP/JP]; 〒5410041 大阪府大阪市中央区北浜4丁目5番33号 Osaka 5-33, Kitahama 4-chome, Chuo-ku, Osaka-shi, Osaka 5410041, JP (AllExceptUS)
小林 憲司 KOBAYASHI, Kenji [JP/JP]; JP (UsOnly)
大村 朋彦 OMURA, Tomohiko [JP/JP]; JP (UsOnly)
Inventors:
小林 憲司 KOBAYASHI, Kenji; JP
大村 朋彦 OMURA, Tomohiko; JP
Agent:
上羽秀敏 UEBA, Hidetoshi; 〒5300043 大阪府大阪市北区天満2丁目2番1号 角野ビル4階 インテリクス国際特許事務所 Osaka Intelix International 4th Fl., Kadono Bldg. 2-1, Tenma 2-chome, Kita-ku Osaka-shi, Osaka 5300043, JP
Priority Data:
2005-20068208.07.2005JP
Title (EN) LOW-ALLOY STEEL FOR OIL WELL TUBE HAVING EXCELLENT SULFIDE STRESS CRACKING RESISTANCE
(FR) ACIER FAIBLEMENT ALLIÉ POUR TUBE DE PUITS DE PÉTROLE D’EXCELLENTE RÉSISTANCE AU FISSURAGE PAR CONTRAINTE DE SULFURE
(JA) 耐硫化物応力割れ性に優れた低合金油井管用鋼
Abstract:
(EN) A low-alloy steel for use in an oil well tube having the following composition by mass: C: 0.20 to 0.35%; Si: 0.05 to 0.5%; Mn: 0.05 to 0.6%; P: 0.025% or less; S: 0.01% or less; Al: 0.005 to 0.100%; Mo: 0.8 to 3.0%; V: 0.05 to 0.25%; B: 0.0001 to 0.005%, N: 0.01% or less; O: 0.01% or less; and remainder: Fe and impurities, the composition satisfying the following requirement shown by the formula (1): 12V + 1 - Mo ≥ 0 (1) wherein the symbol for each element represents the content of the element (% by mass). The low-alloy steel having this constitution shows an excellent SSC resistance.
(FR) L’invention concerne un acier faiblement allié pour tube de puits de pétrole ayant la composition suivante en masse : C : de 0,20 à 0,35% ; Si : de 0,05 à 0,5% ; Mn : de 0,05 à 0,6% ; P : 0,025% ou moins ; S : 0,01% ou moins ; Al : de 0,005 à 0,100% ; Mo : de 0,8 à 3,0% ; V : de 0,05 à 0,25% ; B : de 0,0001 à 0,005%, N : 0,01% ou moins ; O : 0,01% ou moins ; et le reste : Fe et des impuretés, la composition satisfaisant à l’exigence suivante illustrée par la formule (1) : 12V + 1 - Mo ≥ 0 (1) où le symbole pour chaque élément représente la teneur de l’élément (% en masse). L’acier faiblement allié ainsi constituté montre une excellente résistance au fissurage par contrainte de sulfure.
(JA) 本発明による低合金油井管用鋼は、質量%で、C:0.20~0.35%、Si:0.05~0.5%、Mn:0.05~0.6%、P:0.025%以下、S:0.01%以下、Al:0.005~0.100%、Mo:0.8~3.0%、V:0.05~0.25%、B:0.0001~0.005%、N:0.01%以下、O:0.01%以下を含有し、残部はFe及び不純物からなり、式(1)を満たす。  12V+1-Mo≧0 (1) ここで、式中の元素記号は各元素の含有量(質量%)を示す。この構成により、本発明による低合金油井管用鋼は、優れた耐SSC性を有する。
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HN, HR, HU, ID, IL, IN, IS, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)
Also published as:
NO20080003MXMX/a/2007/016249EP1911857BRPI0613173-5JP2007016291RU02378408
US20080105337CN101218364