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1. 发明公开

EP2484458A1 RETRACT MANDREL MILL AND METHOD FOR ROLLING TUBING 有权
标题翻译： WALZWERK MIT EINZIEHBAREN DORNEN UND VERFAHREN ZUM ROLLEN VONRÖHREN
公开(公告)号：EP2484458A1
公开(公告)日：2012-08-08
申请号：EP10820069.2
申请日：2010-09-01
申请人： Sumitomo Metal Industries, Ltd.
发明人： YAMANE, Akihito
IPC分类号： B21B17/04 , B21B19/10 , B21B23/00
CPC分类号： B21B17/04 , B21B19/10 , B21B23/00
摘要： A retract mandrel mill, comprising a mandrel mill and an extractor, the mandrel mill including a mandrel bar and being configured to roll a tube blank into which the mandrel bar is inserted, the extractor being configured to extract the mandrel bar from the tube blank that has been rolled in the mandrel mill, wherein the distance between the mandrel mill and the extractor is adjustable, and a method for rolling a tube blank by using the retract mandrel mill. As the result of the adjustable distance, even when a tube blank which is shorter than usual is rolled, there is no need to add an extra extension to the length of the tube blank to be elongation-rolled, and the wear of the mandrel bar can be suppressed so that the tube blank can be rolled efficiently and with high yields.
摘要翻译：一种包括芯棒式无缝管轧机和提取器的收缩式芯棒式无缝管轧机，所述芯棒式无缝管轧机包括芯棒，并且被配置为滚动将芯棒插入其中的管坯，所述提取器被配置为从管坯抽出芯棒，已经在芯棒式无缝管轧机中轧制，其中芯棒式无缝管轧机和提取器之间的距离是可调节的，以及通过使用回缩式芯棒式无缝管轧机轧制管坯的方法。作为可调节距离的结果，即使当轧制比通常更短的管坯时，也不需要在延长轧制的管坯的长度上增加额外的延伸，并且芯棒的磨损可以抑制管坯的高效率和高收率地卷取。

2. 发明公开

EP3239317A1 HIGH-STRENGTH THICK-WALLED ELECTRIC RESISTANCE WELDED STEEL PIPE FOR CONDUCTOR CASING FOR DEEP WELL, PRODUCTION METHOD THEREFOR, AND HIGH-STRENGTH THICK-WALLED CONDUCTOR CASING FOR DEEP WELL 有权
标题翻译：用于深井的导管套的高强度厚壁电阻焊钢管及其生产方法和用于深井的高强度厚壁导管套管
公开(公告)号：EP3239317A1
公开(公告)日：2017-11-01
申请号：EP15872199.3
申请日：2015-12-15
申请人： JFE Steel Corporation
发明人： GOTO, Sota , OKABE, Takatoshi , OKAZAKI, Yukihiko
IPC分类号： C22C38/00 , B21B19/10 , B21C37/08 , C21D8/02 , C21D9/08 , C21D9/50 , C22C38/14 , C22C38/58
摘要： A high-strength high-toughness electric-resistance-welded steel pipe having high resistance to post-weld heat treatment is provided.
A hot-rolled steel plate serving as a material is subjected to roll forming so as to have a generally circular cross section and is subjected to electric resistance welding to form an electric-resistance-welded steel pipe. The electric-resistance-welded portion of the electric-resistance-welded steel pipe is then subjected to in-line heat treatment. The electric-resistance-welded steel pipe is then subjected to reducing rolling such that the circularity of an end portion of the steel pipe is 0.6% or less. The hot-rolled steel plate serving as a material has a composition containing C: 0.01% to 0.12%, Si: 0.05% to 0.50%, Mn: 1.0% to 2.2%, P: 0.03% or less, S: 0.005% or less, Al: 0.001% to 0.10%, N: 0.006% or less, Nb: 0.010% to 0.100%, and Ti: 0.001% to 0.050% and has a structure composed of 90% or more by volume of a bainitic ferrite phase and 10% or less (including 0%) by volume of a second phase, the bainitic ferrite phase having an average grain size of 10 µm or less, the structure containing fine Nb precipitates having a particle size of less than 20 nm dispersed in a base material portion, the ratio (%) of the fine Nb precipitates to the total amount of Nb being 75% or less on a Nb equivalent basis. The electric-resistance-welded steel pipe can have high strength and toughness and maintain strength through post-weld heat treatment including heating to a temperature of 600°C or more. The electric-resistance-welded steel pipe is less likely to be broken while placed as a deep-well conductor casing.
摘要翻译：提供一种耐焊接后热处理性高的高强度高韧性电阻焊钢管。用作材料的热轧钢板经过辊轧成型以具有大致圆形的横截面并且经受电阻焊接以形成电阻焊接钢管。然后对电阻焊钢管的电阻焊接部分进行在线热处理。然后对电阻焊钢管进行减径轧制，以使钢管端部的圆形度为0.6％以下。作为材料的热轧钢板具有含有C：0.01〜0.12％，Si：0.05〜0.50％，Mn：1.0〜2.2％，P：0.03％以下，S：0.005％或，Al：0.001〜0.10％，N：0.006％以下，Nb：0.010〜0.100％，Ti：0.001〜0.050％，具有贝氏体铁素体相的90体积％以上的组织以及10％以下（包括0％）的第二相，平均粒径为10μm以下的贝氏体铁素体相，含有分散在粒径小于20nm的微细的Nb析出物的组织母材部分中，Nb换算量相对于Nb总量的比例（％）以Nb换算为75％以下。通过加热至600℃以上的温度的焊接后热处理，电阻焊钢管可以具有高强度和韧性并且保持强度。作为深井导体的外壳，电阻焊钢管难以破损。

3. 发明公开

EP2484458A4 RETRACT MANDREL MILL AND METHOD FOR ROLLING TUBING 有权
标题翻译：随着对管件的ROLLS伸缩荆棘和方法轧机
公开(公告)号：EP2484458A4
公开(公告)日：2013-06-05
申请号：EP10820069
申请日：2010-09-01
申请人： NIPPON STEEL & SUMITOMO METAL CORP
发明人： YAMANE AKIHITO
IPC分类号： B21B17/04 , B21B19/10 , B21B23/00
CPC分类号： B21B17/04 , B21B19/10 , B21B23/00

4. 发明公开

EP1651364A4 APPARATUS FOR RECTIFING ROUND PIPE AND TUBING 有权
标题翻译：设备对准管材的
公开(公告)号：EP1651364A4
公开(公告)日：2007-05-09
申请号：EP04735546
申请日：2004-06-01
申请人： STAINLESS TUBE MILLS PTY LTD
发明人： KASTROPIL ANTHONY
IPC分类号： B21C3/08 , B21B19/10 , B21C37/30 , B21D3/04
CPC分类号： B21C3/08 , B21B19/10 , B21C37/08 , B21C37/30 , B21D3/04
摘要： Apparatus for reducing the diameter, rounding or straightening of pipe or tubing by rolling comprising a plurality of closely and equallyspaced, long, narrow, parallel-cylindrical rollers arranged in a parallelcylindrical array through which said pipe or tubing is passed at a constant linear speed, said rollers being skewed to displace their central contact zones radially inwards bringing them into forceful contact with the external surface of said pipe or tubing, and being rotated to cause said central contact zones to describe continuous, parallel, overlapping, helical paths along the external surface of said pipe or tubing and thereby to progressively apply locally to the whole of the external surface of said pipe or tubing a compressive force in excess of the yield strength of its material, causing said pipe or tubing to adopt a set at a smaller diameter.

5. 发明授权

EP0445899B1 Verfahren zur Herstellung von mittel- und dünnwandigen nahtlosen Rohren und Walzeinrichtung zur Durchführung des Verfahrens 失效
标题翻译：一种用于在介质和薄壁无缝管和滚子的制造方法中用于执行该方法。
公开(公告)号：EP0445899B1
公开(公告)日：1995-05-03
申请号：EP91250045.1
申请日：1991-02-14
申请人： MANNESMANN Aktiengesellschaft
发明人： Kümmerling, Rolf, Dr. , Bellmann, Manfred, Dr.-Ing. , Biller, Horst, Dr.-Ing.
IPC分类号： B21B19/10
CPC分类号： B21B19/10

6. 发明公开

EP4130327A1 HIGH-STRENGTH ANTI-COLLAPSE OIL CASING AND MANUFACTURING METHOD THEREFOR 审中-实审
公开(公告)号：EP4130327A1
公开(公告)日：2023-02-08
申请号：EP21803349.6
申请日：2021-05-06
申请人： BAOSHAN IRON & STEEL CO., LTD.
发明人： DONG, Xiaoming , ZHANG, Zhonghua , YANG, Weiguo , LIU, Jiaming
IPC分类号： C22C38/02 , C22C38/04 , C22C38/22 , C22C38/26 , C22C38/24 , C22C38/28 , C22C38/32 , C22C38/06 , C21D8/10 , C21D1/18 , B21B19/04 , B21B19/10 , B21B37/74 , B21D3/00 , B21D37/16
摘要： An anti-collapse oil casing with high strength and a manufacturing method therefor, comprising the following chemical elements in percentage by mass: C: 0.08%-0.18%; Si: 0.1%-0.4%; Mn: 0.1%-0.28%; Cr: 0.2%-0.8%; Mo: 0.2%-0.6%; Nb: 0.02%-0.08%b; V: 0.01%-0.15%; Ti: 0.02%-0.05%; B: 0.0015%-0.005%; and Al: 0.01%-0.05%. The manufacturing method for the anti-collapse oil casing with high strength comprises the steps of: (1) smelting and continuous casting; (2) perforating, rolling, and sizing; (3) controlled cooling: the initial cooling temperature being Ar3+50°C and the final cooling temperature being ≤80°C; the cooling step being performed only to the outer surface of the casing without performing to the inner wall of the casing; and the rate of the controlled cooling being 30-70°C/s; (4) tempering; and (5) thermal straightening. The anti-collapse oil casing with high strength according to the present invention has reasonable chemical composition and process design, which not only has excellent economic efficiency, but also has high strength, high toughness and high anti-collapse performance.

7. 发明公开

EP4092375A1 METHOD FOR RAPIDLY MEASURING ROLLER PASS MAJOR SEMI-AXIS OF THREE-ROLLER REDUCING MILL 有权
公开(公告)号：EP4092375A1
公开(公告)日：2022-11-23
申请号：EP21812221.6
申请日：2021-05-31
申请人： Daye Special Steel Co., Ltd.
发明人： CAO, Hua , HUANGFU, Youli , ZHANG, Housheng , WU, Jun , XIE, Fan
IPC分类号： G01B5/12 , B21B19/10 , B21B37/16 , B21B38/04
摘要： A method for rapidly measuring roller pass major semi-axis of three-roller reducing mill, the method comprising the following steps: selecting a corresponding value of the average diameter of an elliptical pass, a value of a first major semi-axis and a value of a minor semi-axis from a three-roller pass data table according to a rack station number of a special numerical control lathe; calculating a value of a first line segment according to an elliptic equation, the obtained value of the first major semi-axis, and the obtained value of the minor semi-axis; calculating a value of a second major semi-axis according to the right-angle triangle theorem and the value of the first line segment; measuring a first size value by attaching three claws of a three-claw internal micrometer to three roller gaps; or attaching one end of inner calipers to any roller gap, and attaching the other end to the bottom of a roller arc opposite the roller gap to obtain a second size value. The roller pass major semi-axis of the three-roller reducing mill is measured, and the outer diameter precision and the surface quality of a steel pipe are improved.

9. 发明公开

EP3026139A4 LOW-ALLOY STEEL PIPE FOR OIL WELL AND PRODUCTION METHOD THEREFOR 有权转让
标题翻译：尼日利亚州德累斯顿州立大学
公开(公告)号：EP3026139A4
公开(公告)日：2017-01-11
申请号：EP14829364
申请日：2014-07-23
申请人： NIPPON STEEL & SUMITOMO METAL CORP
发明人： ARAI YUJI , OMURA TOMOHIKO , KONDO KEIICHI
IPC分类号： C22C38/00 , B21B3/00 , B21B19/04 , B21B19/10 , C21D1/56 , C21D6/00 , C21D7/13 , C21D8/10 , C21D9/08 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32
CPC分类号： C21D9/085 , C21D1/56 , C21D6/002 , C21D6/005 , C21D6/008 , C21D7/13 , C21D8/105 , C21D9/08 , C21D2211/008 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32
摘要： A low-alloy oil-well steel pipe that has a yield stress of 965 MPa (140 ksi) or more and stably exhibits excellent SSC resistance is provided. The low-alloy oil-well steel pipe according to the present invention includes a chemical composition consisting, in mass%, of C: 0.40 to 0.65%, Si: 0.05 to 0.50%, Mn: 0.10 to 1.00%, P: 0.020% or less, S: 0.0020% or less, Cu: 0.15% or less, Cr: 0.40 to 1.50%, Mo: 0.50 to 2.50%, V: 0.05 to 0.25%, Ti: 0 to less than 0.01%, Nb: 0.01 to 0.2%, sol.Al: 0.010 to 0.100%, N: 0.006% or less, B: 0 to 0.0015%, and Ca: 0 to 0.003%, the balance being Fe and impurities; and a structure consisting of tempered martensite and 0 to less than 2% in volume ratio of retained austenite, and a grain size number of a prior-austenite grain in the structure is 9.0 or more, and in the tempered martensite, a equivalent circular diameter of a sub-structure surrounded by a boundary having a crystal orientation difference of 15° or more from among a packet boundary, a block boundary and a lath boundary is 3 µm or less.
摘要翻译：提供了屈服应力为965MPa（140ksi）以上并且稳定地表现出优异的耐SSC性的低合金油井钢管。根据本发明的低合金油井钢管包括质量％C：0.40〜0.65％，Si：0.05〜0.50％，Mn：0.10〜1.00％，P：0.020％的化学组成以下S：0.0020％以下，Cu：0.15％以下，Cr：0.40〜1.50％，Mo：0.50〜2.50％，V：0.05〜0.25％，Ti：0〜0.01％，Nb：0.01 至0.2％，sol.Al：0.010〜0.100％，N：0.006％以下，B：0〜0.0015％，Ca：0〜0.003％，余量为Fe和杂质; 由回火马氏体组成的结构和残留奥氏体的体积比为0〜小于2％，结构中的奥氏体晶粒的晶粒数为9.0以上，回火马氏体中的等效圆直径由分组边界，块边界和板条边界之间的晶体取向差为15°以上的边界包围的子结构为3μm以下。

10. 发明授权

EP2484458B1 RETRACT MANDREL MILL AND METHOD FOR ROLLING TUBING 有权
标题翻译：随着对管件的ROLLS伸缩荆棘和方法轧机
公开(公告)号：EP2484458B1
公开(公告)日：2015-01-14
申请号：EP10820069.2
申请日：2010-09-01
申请人： Nippon Steel & Sumitomo Metal Corporation
发明人： YAMANE, Akihito
IPC分类号： B21B17/04 , B21B19/10 , B21B23/00
CPC分类号： B21B17/04 , B21B19/10 , B21B23/00

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