公开(公告)号：MX2014004093A

公开(公告)日：2014-05-21

申请号：MX2014004093

申请日：2012-10-16

Applicant: JFE STEEL CORP

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

IPC: F16L15/04

Abstract: [Objetivo] Proporcionar una junta roscada para tuberías que es una junta de tipo de sello radial y que tiene tanto alta resistencia al agarrotamiento como alta capacidad de sellado. [Solución] En la junta roscada para tuberías, un recubrimiento que tiene una dureza Vickers mayor de o igual a 310 se forma sobre una poción roscada de la unión hembra y una superficie interna de la unión hembra correspondiente a una porción de sello. La relación de cantidad de interferencia de sello d/D de la porción de sello en una dirección circunferencial de una tubería es mayor de o igual a 0.002, en donde D es un diámetro de sello definido como un diámetro exterior del extremo macho en un punto de sello que es un punto en la superficie periférica externa de la nariz del extremo macho en el cual la superficie periférica externa primero hace contacto con la superficie periférica interna de la nariz de la unión hembra y d es una cantidad de interferencia definida como una cantidad mediante la cual el diámetro exterior en el punto de sello se reduce por la unión hembra cuando el extremo macho y la unión hembra están conectados de forma roscada entre sí. [Figura Seleccionada] Fig. 4.

公开(公告)号：EP3009725A4

公开(公告)日：2016-06-15

申请号：EP14811719

申请日：2014-06-09

Applicant: JFE STEEL CORP

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

IPC: E21B17/042 ,  F16L15/00 ,  F16L15/06

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

Abstract: In the prior art, only the case where the contact is made on the stabbing flank face 31B is estimated and hence, the prior art has a drawback that when a highly concentrated load acts on the load flank face 30P of the threaded portion on the pin pipe end side, the concentrated load cannot be decreased. In a premium joint, a pitch change is made such that an internally-thread pitch 20B has the same value as an externally-thread pitch 20P from a thread end portion on a box 1 end side to a pitch change position (PCP) taken on a box center side with respect to a position away from the thread end portion by 1/2 of an entire length of the threaded portion, and the internally-thread pitch is changed to a value less than the externally-thread pitch at the pitch change position (PCP) so that a thread gap 10 is gradually decreased from the pitch change position to a position (PCP) of the thread end portion on the box center side, and the thread gap is eventually set to a value which is 0.2 to 0.8 times as large as the thread gap 10 before the pitch change is made.

公开(公告)号：EP2690336A4

公开(公告)日：2015-11-11

申请号：EP12760806

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 ,  E21B17/042 ,  F16L15/00 ,  F16L15/06

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

Abstract: Provided is a threaded joint for steel pipes having high sealability even under a bending load. To be specific, in the threaded joint, when a pin 3 and a box 1 are threadedly connected with each other, the outer peripheral face of a nose 8 of the pin and the inner peripheral face of a nose of the box are in metal-to-metal contact with each other at a contact portion and the contact portion serves as a seal portion 20. A threaded portion (at which the externally threaded portion 7 and the internally threaded portion 5 are threadedly connected with each other) has a negative load flank angle ±, shoulder portions 12 and 14 have a negative torque shoulder angle ², and the ratio L/d 0 of a length L of the nose and a pipe outside diameter do is equal to or higher than 0.08.

公开(公告)号：EP2977662A4

公开(公告)日：2016-05-25

申请号：EP14811561

申请日：2014-06-09

Applicant: JFE STEEL CORP

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

IPC: F16L15/04 ,  E21B17/04 ,  F16B33/02

CPC classification number: E21B17/042 ,  F16B33/02 ,  F16L15/004 ,  F16L15/06

Abstract: The prior art has a drawback that it is difficult to provide a threaded joint for an oil country tubular goods having excellent galling resistance at a threaded portion on a pin pipe end side as industrial products. Provided is a threaded joint for an oil country tubular goods having excellent galling resistance, which is a premium joint, a ratio L/p of a chamfer length of pin thread L to a thread pitch p being set to 1.0 or more to 3.0 or less.

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：EP3246611A4

公开(公告)日：2018-01-24

申请号：EP15877747

申请日：2015-11-24

Applicant: JFE STEEL CORP

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

IPC: F16L15/04 ,  E21B17/042

CPC classification number: E21B17/042 ,  F16L15/04

Abstract: Provided is a screw joint for a pipe which improves seal property, compression resistance property and galling resistance property. The screw joint for a pipe has a pin member 3 of which an outer diameter of a raw pipe portion is set to 168.3mm or less. An outer peripheral surface of a nose portion of the pin member 3 is formed into an outwardly projecting convex curve as viewed in cross section taken along an axial direction of the pin member. The convex curve is formed into a curved shape where a composite R curve is formed by sequentially connecting a plurality of outwardly convex arcs having different radii of curvature R from each other on a generating line of a cylindrical portion disposed adjacent to a male threaded portion. A radius of curvature R of the arc is increased as the arc is away from the male threaded portion, and a tangent of the arc on a connecting point agrees with a tangent of the arc which is a connection counterpart. The inner peripheral surface of a box member 1 is formed into a tapered surface which interferes with the outer peripheral surface of the nose portion of the pin member at the time of joining with the pin member, and a length of the nose portion of the pin member is set to 5mm or more and less than 20mm.

公开(公告)号：EP2998633A4

公开(公告)日：2016-08-17

申请号：EP14832228

申请日：2014-07-29

Applicant: JFE STEEL CORP

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

IPC: F16L15/04 ,  E21B17/042 ,  E21B17/08

CPC classification number: F16L15/06 ,  E21B17/042 ,  E21B17/08

Abstract: The prior art cannot suppress the plastic deformation of the whole pin distal end when a compressive load is applied, deteriorating durability of threaded joint. Provided is a premium threaded joint where a pin-side shoulder angle ¸1, a box-side shoulder angle ¸2, a seal interference quantity ´ and a seal point distance xp satisfy a relationship expressed by ¸2-¸1=±x´/xp, ±=7 to 14, and a pin distal end thickness tp1 which is defined by a difference Re-Ri between a radius Re of a pin most distal end portion and an inner radius Ri of a pin distal end portion is 0.25 times or more as large as a pin raw pipe thickness tp0.

公开(公告)号：EP2937612A4

公开(公告)日：2016-04-06

申请号：EP13875099

申请日：2013-12-18

Applicant: JFE STEEL CORP

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

IPC: F16L15/04 ,  E21B17/042

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

Abstract: Although a means for suppressing deformation of a pin seal has been proposed in a related art, a method of solving a problem caused by deformation on a box side has not been proposed. The present invention provides a threaded joint for pipes, characterized in that the relationship 0.05 degrees ‰¤ ¸ sb - ¸ sp ‰¤ 2.0 degrees is satisfied, where ¸ sb is an angle of an insertion surface 21 of the female thread on the box 1 side relative to a plane perpendicular to an axis of pipe, and ¸ sp is an angle of an insertion surface 20 of the male thread, which faces the insertion surface 21 of the female thread, on the pin 3 side relative to the plane perpendicular to the axis of pipe.

公开(公告)号：MX384861B

公开(公告)日：2025-03-14

申请号：MX2016009511

申请日：2016-07-21

Applicant: JFE STEEL CORP

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

IPC: E21B17/042 ,  F16L15/00 ,  F16L15/06

Abstract: Se proporciona una junta roscada para tubo donde el esfuerzo o la concentración de deformación apenas se producen en una porción de esquina roscada de lado de unión hembra incluso cuando la junta roscada recibe fuerzas de tracción-compresión repetidas o fuerzas de flexión repetidas. En una junta roscada de tipo de sello radial para tubo, una eficiencia de tracción TE (%) definida por una relación sección transversal circunferencial de tubo de una unión hembra 1 y un área de sección transversal Sp de un cuerpo de tubo 10 satisface una fórmula TE(%)=2.25xt/p+99.9 donde una relación t/? entre una altura roscada interna t de la unión hembra 1 y un radio de curvatura ? de una porción de esquina 6 de lado de superficie de carga inferior roscada internamente.

公开(公告)号：AR107648A1

公开(公告)日：2018-05-16

申请号：ARP170100399

申请日：2017-02-17

Applicant: JFE STEEL CORP

Inventor： YONEYAMA TSUYOSHI ,  TAKANO JUN ,  UETA MASATERU ,  SEKI HARUHIKO ,  YOSHIKAWA MASAKI ,  KANAYAMA TARO ,  KAWAI TAKAMASA

IPC: E21B17/042 ,  F16L15/04

Abstract: Se provee una junta roscada para una tubería de producción para pozos de petróleo que posee la suficiente capacidad de sellado cuando se aplica una presión externa a la junta roscada suprimiendo la deformación plástica de una porción nariz y suficiente resistencia a la excoriación. Esta resistencia a la excoriación suficiente es provista al evitar que se produzcan excoriaciones en el momento de enroscar la junta roscada durante la prueba de verificación que se lleva a cabo de acuerdo con la norma ISO 13679:2002 incluso cuando la unión roscada para una tubería de producción para pozos de petróleo presente un espesor pequeño. Los parámetros que incluyen los tamaños de la unión roscada en las posiciones del punto de sello y las porciones de hombro cumplen con las fórmulas (1) y (2), y se establece Ls / Ln entre 0,2 y 0,6. (Ds1² - Ds0²) / (D1² - D0²) ³ 0.30 (1) tanq > (DD + d) / {2 (Lt - Ls)} (2).