公开(公告)号：MX2015016315A

公开(公告)日：2016-03-16

申请号：MX2015016315

申请日：2014-06-09

Applicant: JFE STEEL CORP

Inventor： NAGAHAMA TAKUYA ,  YOSHIKAWA MASAKI ,  TAKANOJUN ,  KAWAI TAKAMASA ,  TAKAHASHI KAZUNARI ,  CHIKATSUNE HIROSHI ,  UETA MASATERU ,  ASATO HIDEO ,  SEKI HARUHIKO ,  YONEYAMA TSUYOSHI

IPC: F16L15/04

Abstract: En la técnica anterior, solamente el caso donde el contacto se hace en la cara de flanco de enchufado 31B se estima y por lo tanto, la técnica anterior tiene el inconveniente de que cuando una carga muy concentrada actúa sobre la cara de flanco de carga 30P de la porción roscada en el lado de extremo de tubería de extremo macho, la carga concentrada no se puede disminuir. En una junta premium, un cambio de paso se hace de tal manera que un paso de rosca internamente 20B tiene el mismo valor que un paso de rosca externamente 20P desde una porción de extremo de rosca en un lado extremo de la unión hembra 1 hasta una posición de cambio de paso (PCP) tomada en un lado central de unión hembra con respecto a una posición alejada de la porción de extremo de rosca por 1/2 de toda la longitud de la porción roscada, y el paso de rosca internamente se cambia a un valor menor que el paso de rosca externamente en la posición de cambio de paso (PCP) de modo que un espacio de rosca 10 se disminuye gradualmente desde la posición de cambio de paso a una posición (PCP) de la porción de extremo de rosca en el lado central de unión hembra, y el espacio de rosca se establece finalmente en un valor que es 0.2 a 0.8 veces tan grande como el espacio de rosca 10 antes de que se hace el cambio de paso.

公开(公告)号：AU2012232466B2

公开(公告)日：2015-09-03

申请号：AU2012232466

申请日：2012-02-24

Applicant: JFE STEEL CORP

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

IPC: F16L15/04

Abstract: Provided is a screw joint for steel piping that exhibits excellent sealing properties even when subjected to a bending load. Specifically provided is a screw joint for steel piping in which a pin (3) and a box (1) are coupled by means of screw coupling, bringing the outer peripheral surface of the nose portion of the pin (8) and the inner peripheral surface of the nose portion of the box into metal to metal contact, this contact portion forming a seal portion (20). The load flank angle α of the screw portion (the screw coupling portion of a male screw (7) and a female screw (5)) is the load side and the torque shoulder angle &bgr; of a shoulder portion (12, 14) is the load side, and L/d

公开(公告)号：CA2931087A1

公开(公告)日：2015-07-16

申请号：CA2931087

申请日：2014-10-30

Applicant: JFE STEEL CORP

Inventor： KAWAI TAKAMASA ,  TAKAHASHI KAZUNARI ,  CHIKATSUNE HIROSHI ,  YOSHIKAWA MASAKI ,  TAKANO JUN ,  NAGAHAMA TAKUYA ,  UETA MASATERU ,  YONEYAMA TSUYOSHI ,  SATO HIDEO ,  SEKI HARUHIKO

IPC: F16L15/04

Abstract: The purpose of the present invention is to provide a threaded joint for an ultra thick oil well pipe, the joint being able to maintain sealability and prevent the occurrence of galling in a state where a high compressive force is applied and high external pressure acts on the joint. A surface of a pin (3) that serves as sealing parts (13, 11) and a surface on a box (1) side respectively have a convex curved surface and a tapered surface. With respect to the pin (3), a pin seal thickness ts is no more than 15mm, a shape parameter ts/D (D is the outer diameter of a pin original pipe section) is at least 0.045, and a total screw length ratio L/t (L is the pin total screw length, and t is the thickness of the pin original pipe section) is no more than 4Ø

公开(公告)号：AU2011272607B2

公开(公告)日：2015-03-12

申请号：AU2011272607

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

Abstract: Disclosed is a pipe screw coupling that has increased sealing properties, compression resistance, and galling resistance. Specifically, the pin nose outer peripheral surface (30) forms a convex curve on the outside thereof in a cross section in the axial direction. Said convex curve has a curved shape wherein a compound-R curve (N) comprising a plurality of outwardly convex arcs that are connected in sequence and that have radii of curvature (R) that differ from each other at the generating line of a cylindrical section that is adjacent to a male screw section (5) is such that the radii of curvature (R) of the arcs increase with distance from the male screw section (5) and the line tangent to the connection point of an arc is the same as that of the arc connected to. The inner peripheral surface relative to the pin nose (30) of a box member (1) has a tapered surface (20) that interferes with the pin nose outer peripheral surface (30) when connecting with the pin member (3).

公开(公告)号：SA3409B1

公开(公告)日：2014-05-21

申请号：SA111320568

申请日：2011-06-29

Applicant: JFE STEEL CORP

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

Abstract: الملخـــص: تمّتزويدوصلةملولبة threaded joint لأنبوبحيثحُسِّنتقابليةمنعالتسرب،مقاومةالانضغاط compression resistance،ومقاومةالتخدش galling resistance. بشكلمحدد،يشكِّلسطحأنفمسماري pin nose محيطيخارجي (30) منحنىمحدباًنحوالخارجفيمنظرمقطععرضيمحوري؛يكونالمنحنىالمحدببحيثأنمنحنى R مركب (N)،تتصلفيهمجموعةأقواسمحدبةنحوالخارجتشملأنصافأقطارانحناءمختلفة (Rs) تتابعياًبخطمولد generating line لجزءأسطوانيتالٍلعضوذكري (5)،يكونمنحنياًبحيثأنأنصافأقطارالانحناء (Rs) تزيدمعالمسافةمنالعضوالذكري (5) وتتحاذىمماساتعلىنقاطوصلالأقواسمعمماساتالأقواسالمطابقةالمتصلةبها؛ويكونالسطحالمحيطيالداخليلمكونالنقر box component (1) المواجهللأنفالمسماري pin nose (30) سطحاًمستدقاً (20) يتداخلمعسطحالأنفالمسماريالمحيطيالخارجي (30) عنداتصالهمعمكونلسان pin component (3). الشكل 1 (أ)

公开(公告)号：AR085462A1

公开(公告)日：2013-10-02

申请号：ARP120100920

申请日：2012-03-21

Applicant: JFE STEEL CORP

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

IPC: F16L15/00

Abstract: Se provee una junta roscada para caños de acero que tiene una alta capacidad de sellado, incluso bajo una carga de flexión. Para ser específicos, en la junta roscada, cuando un vástago 3 y una caja 1 se enroscan entre sí, la cara periférica exterior de una cara libre 8 del vástago y la cara periférica interior de una cara libre de la caja se encuentran en contacto de metal con metal entre sí, en una porción de contacto, y la porción de contacto sirve como una porción de sellado 20. Una porción roscada (en la cual la porción con roscas externas 7 y la porción con roscas internas 5 se enroscan entre sí) tiene un ángulo lateral de carga negativo a, unas porciones del brazo 12 y 14 tienen un ángulo del brazo de torque negativo b, y la relación L/d0 de un largo L de la cara libre y un diámetro externo del caño d0 es igual o superior a 0,08.

公开(公告)号：AU2012223950A1

公开(公告)日：2013-08-29

申请号：AU2012223950

申请日：2012-02-24

Applicant: JFE STEEL CORP

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

IPC: F16L15/04

Abstract: In a radial-seal type threaded coupling for a steel pipe, there is room for improvement in ensuring the seal in terms of the rigidity of a pin nose. Specifically, the nose portion outer peripheral surface of a pin (3) is provided with a shape of an outwardly convex curved surface, the seal surface of a box (1) is provided with a tapered shape, and the cross-sectional area of the pin at a seal point (sp), which is a part on the nose portion outer peripheral surface of the pin that first comes into contact with the seal surface of the box when establishing a threaded engagement, is set to be equal to or greater than 35 % of the cross-sectional area of a base pipe portion, which is an unprocessed portion of the pin.

公开(公告)号：CA2827922A1

公开(公告)日：2012-09-27

申请号：CA2827922

申请日：2012-02-24

Applicant: JFE STEEL CORP

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

IPC: F16L15/04

Abstract: Provided is a screw joint for steel piping that exhibits excellent sealing properties even when subjected to a bending load. Specifically provided is a screw joint for steel piping in which a pin (3) and a box (1) are coupled by means of screw coupling, bringing the outer peripheral surface of the nose portion of the pin (8) and the inner peripheral surface of the nose portion of the box into metal to metal contact, this contact portion forming a seal portion (20). The load flank angle a of the screw portion (the screw coupling portion of a male screw (7) and a female screw (5)) is the load side and the torque shoulder angle ß of a shoulder portion (12, 14) is the load side, and L/d0, the ratio of the length of the nose portion L and the outer diameter of the pipe d0, is 0.08 or greater.

公开(公告)号：CA2827619A1

公开(公告)日：2012-09-07

申请号：CA2827619

申请日：2012-02-24

Applicant: JFE STEEL CORP

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

IPC: F16L15/04

Abstract: In a radial-seal type threaded coupling for a steel pipe, there is room for improvement in ensuring the seal in terms of the rigidity of a pin nose. Specifically, the nose portion outer peripheral surface of a pin (3) is provided with a shape of an outwardly convex curved surface, the seal surface of a box (1) is provided with a tapered shape, and the cross-sectional area of the pin at a seal point (sp), which is a part on the nose portion outer peripheral surface of the pin that first comes into contact with the seal surface of the box when establishing a threaded engagement, is set to be equal to or greater than 35 % of the cross-sectional area of a base pipe portion, which is an unprocessed portion of the pin.

公开(公告)号：DE60204082D1

公开(公告)日：2005-06-16

申请号：DE60204082

申请日：2002-05-31

Applicant: JFE STEEL CORP

Inventor： TOYOOKA TAKAAKI ,  ARATANI MASATOSHI ,  KAWABATA YOSHIKAZU ,  HASHIMOTO YUJI ,  YORIFUJI AKIRA ,  OKABE TAKATOSHI ,  NAGAHAMA TAKUYA ,  KIMURA MITSUO

IPC: C22C38/00 ,  B21B3/02 ,  B21B17/14 ,  B21B45/00 ,  B21C37/06 ,  B21D26/039 ,  B21D26/043 ,  B21D26/047 ,  C21D8/10 ,  B21B3/00

Abstract: A welded steel pipe is formed by heating or soaking an untreated welded steel pipe having a steel composition containing, on the basis of mass percent: about 0.03% to about 0.2% C, about 2.0% or less of Si, not less than about 1.0% to about 1.5% Mn, about 0.1% or less of P, about 0.01% or less of S, about 1.0% or less of Cr, about 0.1% or less of Al, about 0.1% or less of Nb, about 0.1% or less of Ti, about 0.1% or less of V, and about 0.01% or less of N; and by reduction-rolling the treated steel pipe at a cumulative reduction rate of at least about 35% and a final rolling temperature of about 500 DEG C to about 900 DEG C. The welded steel pipe exhibits excellent hydroformability, i.e., has a tensile strength of at least about 590 MPa and an nxr product of at least about 0.22. The treated steel pipe is preferably reduction-rolled at a cumulative reduction rate of at least about 20% below the Ar3 transformation point.