公开(公告)号：EP2949983A4

公开(公告)日：2016-04-06

申请号：EP13872310

申请日：2013-01-28

Applicant: JFE STEEL CORP

Inventor： NAGAHAMA TAKUYA ,  SONOBE OSAMU ,  YOSHIKAWA MASAKI ,  TAKANO JUN ,  KAWAI TAKAMASA

IPC: E21B17/042 ,  F16L15/00 ,  F16L15/04

CPC classification number: E21B17/042 ,  F16L15/00 ,  F16L15/004 ,  F16L2201/40

Abstract: Provided is a threaded joint in which the outer peripheral face 31 of the pin nose 8 has a single tapered shape, the seal face 21 of the box 1 has an outwardly convex curved shape, and a seal point x p defined by the following equation is greater than or equal to 0.2 inches, x p = ˆ« x 1 x 2 �¢ p �¢ x † x F F = ˆ« x 1 x 2 �¢ p † x , where p is a contact face pressure, x is a distance from an end of the pin in a pipe axis direction, and x 1 and x 2 are respectively a lower limit and an upper limit of a domain of x corresponding to the seal portion.

Abstract translation: 提供了一种螺纹接头，其中销头8的外周面31具有单个锥形形状，盒1的密封面21具有向外凸的弯曲形状，并且由以下等式定义的密封点xp较大 不超过或等于0.2英寸，xp =«x 1 x 2 ¢p ¢x†x FF =«x 1 x 2 ¢p†x，其中p是接触面压力，x是距离 销轴在管轴方向上的端部，x 1和x 2分别是对应于密封部分的x的下限和x的上限。

公开(公告)号：EP2770239A4

公开(公告)日：2015-11-25

申请号：EP12841901

申请日：2012-10-16

Applicant: JFE STEEL CORP

Inventor： YOSHIKAWA MASAKI ,  NAGAHAMA TAKUYA ,  CHIKATSUNE HIROSHI ,  TAKANO JUN ,  KAWAI TAKAMASA ,  UETA MASATERU ,  TAKAHASHI KAZUNARI ,  MORIOKA NOBUHIKO

IPC: F16L15/04

CPC classification number: F16L15/004 ,  C10M103/04 ,  C10M171/00 ,  C10M2201/053 ,  C10N2210/01 ,  C10N2210/04 ,  C10N2210/06 ,  C10N2230/06 ,  E21B17/042

Abstract: [Object] To provide a threaded joint for pipes that is a radial seal type joint and that has both high galling resistance and high sealability. [Solution] In the threaded joint for pipes, a coating having a Vickers hardness greater than or equal to 310 is formed on a threaded portion of the box and an inner face of the box corresponding to a seal portion. The seal interference amount ratio ´/D of the seal portion in a pipe circumferential direction is greater than or equal to 0.002, where D is a seal diameter defined as an outside diameter of the pin at a seal point that is a point on the outer peripheral face of the nose of the pin at which the outer peripheral face first comes into contact with the inner peripheral face of the nose of the box and ´ is an interference amount defined as an amount by which the outside diameter at the seal point is reduced by the box when the pin and the box are threadedly connected with each other.

公开(公告)号：EP2589846A4

公开(公告)日：2015-04-01

申请号：EP11800871

申请日：2011-06-22

Applicant: JFE STEEL CORP

Inventor： SONOBE OSAMU ,  NAGAHAMA TAKUYA ,  YOSHIKAWA MASAKI ,  TAKANO JUN ,  KAWAI TAKAMASA ,  TAKAHASHI KAZUNARI

IPC: F16L15/04 ,  E21B17/042 ,  F16L15/00

CPC classification number: E21B17/042 ,  F16L15/00 ,  F16L15/004 ,  F16L15/06

公开(公告)号：EP2116311A4

公开(公告)日：2013-06-26

申请号：EP07859917

申请日：2007-12-14

Applicant: JFE STEEL CORP

Inventor： HASEGAWA KOHEI ,  INOUE TADASHI ,  KAWAI TAKAMASA ,  KIMURA YUKIO

IPC: B21B1/22 ,  B21B27/00 ,  B21B27/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/38

CPC classification number: C22C38/06 ,  B21B1/227 ,  B21B27/005 ,  B21B2001/228 ,  B21B2265/14 ,  B21B2267/10 ,  C21D7/04 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  Y10T428/12389

公开(公告)号：JP2014105731A

公开(公告)日：2014-06-09

申请号：JP2012257476

申请日：2012-11-26

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： KAWAI TAKAMASA ,  TAKAHASHI KAZUNARI ,  CHIKATSUNE HIROSHI ,  YOSHIKAWA MASAKI ,  TAKANO JUN ,  NAGAHAMA TAKUYA ,  UEDA MASATERU

IPC: F16L15/04

Abstract: PROBLEM TO BE SOLVED: To provide a screw joint for pipe that is suitable for connection of steel pipes such as an oil well pipe, a riser pipe and a line pipe, and is excellent in sealability, compression resistance performance and galling resistance performance.SOLUTION: An outer peripheral surface part to be a seal part 21 on the side of a pin 3 is a convex surface 10 that is a rotation locus around a shaft of a convex arc 9 to be an arc existing in a pin outer peripheral surface in an axial cross section view and having a chord in the pin. A component inner peripheral surface part to be the seal part 21 on the side of a box 1 is a composite curve surface 19 that is constituted by connecting a first taper 15 positioned on a near shoulder part side and a second taper 16 positioned on a far shoulder part side through a concave surface 18 that is a rotation locus around a shaft of a concave arc 17 to be an arc existing in a box inner peripheral surface in the axial cross section view and having a chord outside the box. A curvature radius Rb of the concave arc 17 and a curvature radius Rp of the convex arc 9 satisfy the following relation: Rb≥Rp×0.7.

Abstract translation: 要解决的问题：提供一种用于连接诸如油井管，立管和管线管等钢管的管的螺纹接头，并且具有优异的密封性，抗压缩性能和耐磨损性能。 ：作为销3侧的密封部21的外周面部分是作为圆弧9的轴的旋转轨迹的凸面10，其为存在于销3的销外周面中的电弧 轴向剖视图，并且在销中具有弦。 作为箱体1侧的密封部21的部件内周面部分是复合曲面19，其通过连接位于近肩部侧的第一锥形15和位于远侧的第二锥形16而构成 通过作为在轴向剖视图中存在于盒内周面的电弧的凹弧17的轴周围的旋转轨迹的凹面18，并且在框外方具有弦。 凹弧17的曲率半径Rb和凸弧9的曲率半径Rp满足以下关系：Rb≥Rp×0.7。

公开(公告)号：JP2013087829A

公开(公告)日：2013-05-13

申请号：JP2011227665

申请日：2011-10-17

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： YOSHIKAWA MASAKI ,  NAGAHAMA TAKUYA ,  CHIKATSUNE HIROSHI ,  TAKANO JUN ,  KAWAI TAKAMASA ,  UEDA MASATERU ,  TAKAHASHI KAZUNARI ,  MORIOKA NOBUHIKO

IPC: F16L15/04

CPC classification number: F16L15/004 ,  C10M103/04 ,  C10M171/00 ,  C10M2201/053 ,  C10N2210/01 ,  C10N2210/04 ,  C10N2210/06 ,  C10N2230/06 ,  E21B17/042

Abstract: PROBLEM TO BE SOLVED: To provide a screw joint for a steel pipe, which is a radial seal-type joint and which combines excellent galling resistance and sealability.SOLUTION: In the screw joint for the pipe, plating with a Vickers hardness of 310 or higher is applied to an inner surface of a box, equivalent to a screw part and a seal part of the box. In the case where D represents a seal diameter defined by an outside diameter of a pin at a sealing point as a part on an outer peripheral surface of a pin-side nose part firstly coming into contact with an inner peripheral surface of a box-side nose part in screw connection and where δ represents an interference amount defined by a diameter reduction amount when the seal point is diameter-reduced by the box, a seal interference amount ratio in the circumferential direction of the pipe in the seal part, which is computed by δ/D, is 0.002 or more.

Abstract translation: 要解决的问题：提供一种用于作为径向密封型接头的钢管的螺纹接头，其结合了优异的耐磨损性和密封性。

解决方案：在用于管道的螺纹接头中，维氏硬度为310或更高的电镀施加到盒的内表面，相当于盒的螺纹部分和密封部分。 在D表示由作为销侧鼻部的外周面的一部分的密封点处的销的外径确定的密封直径首先与盒侧的内周面接触的情况下 螺钉连接的前端部，δ表示当密封点被箱减小时由直径减小量限定的干涉量，密封部中的管的圆周方向的密封干涉量比，计算出 δ/ D为0.002以上。 版权所有（C）2013，JPO＆INPIT

公开(公告)号：JP2012247027A

公开(公告)日：2012-12-13

申请号：JP2011120560

申请日：2011-05-30

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： YOSHIKAWA MASAKI ,  NAGAHAMA TAKUYA ,  SONOBE OSAMU ,  TAKANO JUN ,  KAWAI TAKAMASA

IPC: F16L15/04

Abstract: PROBLEM TO BE SOLVED: To provide a screw joint for a steel pipe of radial seal type capable of solving the problem of deviation in thickness and eccentricity of a pin, for stable sealing performance, in the context that a pin is thinner in wall thickness and lower in rigidity when compared with a box, which may result in degradation in sealing performance because of thickness deviation and eccentricity.SOLUTION: A nose part outer peripheral surface on a pin 3 side is tapered. A nose part inner peripheral surface on a box 1 side is a curved surface protruding outward. The inner diameter side and the outer diameter side of the pin 3 are ground. The range of its inner grinding length is from the tip end of a pin nose 8 to at least a sealing point sp, with a deviation rate in thickness within the range being specified.

Abstract translation: 要解决的问题：为了提供一种用于径向密封型钢管的螺纹接头，其能够解决销的厚度偏差和偏心度的问题，为了稳定的密封性能，在销较薄的情况下 与箱体相比，壁厚度和刚度低，这可能由于厚度偏差和偏心而导致密封性能下降。 解决方案：销3侧的鼻部外周面呈锥形。 箱1侧的鼻部内周面是向外突出的曲面。 销3的内径侧和外径侧被研磨。 其内研磨长度的范围是从针鼻8的尖端到至少一个密封点sp，厚度偏差率在规定的范围内。 版权所有（C）2013，JPO＆INPIT

公开(公告)号：JP2012211683A

公开(公告)日：2012-11-01

申请号：JP2011210031

申请日：2011-09-27

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： YOSHIKAWA MASAKI ,  NAGAHAMA TAKUYA ,  CHIKATSUNE HIROSHI ,  TAKANO JUN ,  KAWAI TAKAMASA ,  UEDA MASATERU ,  TAKAHASHI KAZUNARI ,  SONOBE OSAMU

IPC: F16L15/04

CPC classification number: F16L15/001 ,  E21B17/042 ,  F16L15/004 ,  F16L15/06

Abstract: PROBLEM TO BE SOLVED: To provide a screw joint for steel piping that exhibits superior sealing properties even when subjected to a bending load.SOLUTION: The screw joint for steel piping is configured such that a pin 3 and a box 1 are coupled by means of screw coupling, bringing the outer peripheral surface of the nose part 8 of the pin and the inner peripheral surface of the nose part of the box into metal to metal contact, this contact part forming a seal part 20. The load flank angle α of the screw part (screw coupling part of a male screw 7 and a female screw 5) is the negative side and the torque shoulder angle β of a shoulder part 12, 14 is the negative side, and L/d, the ratio of the length of the nose part L and the outer diameter of the pipe d, is ≥0.08.

Abstract translation: 要解决的问题：为了提供即使经受弯曲载荷也显示出优异的密封性能的钢管的螺纹接头。 解决方案：用于钢管的螺纹接头被构造成使得销3和箱1通过螺纹联接联接，使得销的鼻部8的外周表面和销的内周表面 该接触部分形成密封部分20.螺钉部分（外螺纹7的螺纹联接部分和阴螺纹5）的负载侧面角α为负侧，并且 肩部12,14的扭矩肩角β为负侧，L / d 0 ，鼻部L的长度与外径的比 管道d 0 ，≥0.08。 版权所有（C）2013，JPO＆INPIT

公开(公告)号：JP2010179333A

公开(公告)日：2010-08-19

申请号：JP2009024428

申请日：2009-02-05

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： KAWAI TAKAMASA ,  TATENO JUNICHI ,  YAMADA MAKOTO ,  TOKUNAGA MUNEYASU ,  TATENO BUNGO

IPC: B21B1/22 ,  B21B15/00 ,  B23D19/06

Abstract: PROBLEM TO BE SOLVED: To provide a method of stably manufacturing a cold-rolled steel sheet with good quality by preventing a push-in flaw due to properties of an edge part of a product and trimming after cold rolling.
SOLUTION: A pair of upper and lower circular rotary blades are pressed to a predetermined depth from the above and the below with respect to an edge part of a hot rolled steel sheet before pickling. Shearing is applied to the edge part in an unseparated state. The edge parts are separated through pinching by narrow width rolls installed at the respective edge parts and capable of pinching only the edge parts, and then pickling and cold rolling with a reduction rate of ≥30% are applied.
COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：通过防止由于产品的边缘部分的特性引起的推入缺陷并且在冷轧后进行修整，提供了具有良好质量的冷轧钢板的稳定制造方法。 解决方案：一对上下圆形的旋转刀片相对于酸洗前的热轧钢板的边缘部分被从上下按压到预定的深度。 剪切以未分离状态施加到边缘部分。 边缘部分通过夹在各边缘部分的窄宽度辊分开，并且仅能够夹紧边缘部分，然后施加以≥30％的压下率进行酸洗和冷轧。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2015055296A

公开(公告)日：2015-03-23

申请号：JP2013188937

申请日：2013-09-12

Applicant: Jfeスチール株式会社 ,  Jfe Steel Corp

Inventor： TAKANO JUN ,  TAKAHASHI KAZUNARI ,  CHIKATSUNE HIROSHI ,  YOSHIKAWA MASAKI ,  KAWAI TAKAMASA ,  NAGAHAMA TAKUYA ,  UEDA MASATERU

IPC: F16L15/04 ,  E21B17/042

Abstract: 【課題】油井管用ねじ継手のプレシール部及び、サブシール部に焼付きが発生し難く、所定のシール性を保てる油井管用ねじ継手を提供する。【解決手段】締付け時凹部6と干渉してこれを管外径側に摺動させる凸部7を設け、凸部7及び凹部6の形状を、締付け完了時には前記凹部6に連なるピン1外径側の端部が前記ボックス2に密着する形状とし、ボックス2の最奥端からピン1挿入口側への管軸方向長さAがシール干渉量δ1に対し、A≧50?|δ1|になる長さ領域である特定長さ領域10内で、ねじ干渉量δ0を負(δ0

Abstract translation: 要解决的问题：提供一种用于油井管的螺纹接头，其中在其预密封部分和副密封部分难以产生咬合，并且可以确保规定的密封特性。解决方案：提供了一个显着的7 在紧固工作时与凹部6干涉，使凹部朝向管的外径滑动，突出部7和凹部6的形状被设定为使得销部的外径侧的端部 与紧固作业完成时的凹部6连续的1与箱体2紧密接触，螺杆干涉量δ0为负（δ0<0），1 |δ0| <|δ| 在从盒子的最深端到销1的插入口的管轴长度A为A≥50×|δ1|的长度区域的规定长度区域10内， 关于密封干扰量δ1。