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：AU2019356283A1

公开(公告)日：2021-05-20

申请号：AU2019356283

申请日：2019-06-13

Applicant: JFE STEEL CORP

Inventor： KAWAI TAKAMASA ,  KANAYAMA TARO ,  YOSHIKAWA MASAKI ,  YONEYAMA TSUYOSHI ,  GOTO SEIGO

IPC: F16L15/04

Abstract: Provided is a threaded joint having excellent tensile strength. A threaded joint 1 according to the present invention is formed through connection of a pin 2 having, on the outer circumference at the leading end side of a first steel pipe, a male thread part provided with a first male thread portion and a second male thread portion with steps C therebetween, and a box 3 having, on the inner circumference at the leading end side of a second steel pipe, a female thread part provided with a first female thread portion and a second female thread portion with the steps C therebetween, the connection being made through engagement between the male thread part and the female thread part. A length L1 of a first thread row A, a length L2 of a second thread row B, a cross-sectional area P1 at an end section position 4, a cross-sectional area P2 at an end section position 5, a cross-sectional area B1 at an end section position 6, and a cross-sectional area B2 at an end section position 7 satisfy formula (1): (P2,B2)min≤P1/{L1/(L1+L2)} and formula (2): (P2,B2)min≤B1/{L2/(L1+L2)}, where (P2,B2)min represents the smaller value between P2 and B2.

公开(公告)号：RU2742962C1

公开(公告)日：2021-02-12

申请号：RU2020129041

申请日：2019-02-14

Applicant: JFE STEEL CORP

Inventor： KAWAI TAKAMASA ,  YOSHIKAWA MASAKI ,  TAKANO JUN ,  NAGAHAMA TAKUYA ,  SEKI HARUHIKO

IPC: F16L15/04 ,  E21B17/042

Abstract: Резьбовоесоединениетрубдлянефтяныхскважин, вкоторомобеспечиваетсяэффективнаядлинарезьбыучасткарезьбыи уменьшаютсявремяобработкии времямонтажа. Согласноизобретениюпредлагаетсярезьбовоесоединениетрубдлянефтяныхскважининтегральноготипа, содержащеениппель 2, имеющийучасток 4 наружнойрезьбы, котораяявляетсянаружнойконическойрезьбой, наодномконцестальнойтрубы; имуфту 3, имеющуюучасток 5 внутреннейрезьбы, котораяявляетсявнутреннейконическойрезьбой, соединеннойс участкомнаружнойрезьбы, наодномконцестальнойтрубы. Конструкция, вкоторойниппельи муфтанаходятсяв металлическомконтактедругс другомдлягерметизациитекучейсреды, выполненапоменьшеймерев одномместеучасткауплотнениянастороненаружнойпериферийнойповерхностиниппеляс концевойсторонытрубыи участкауплотнениянастороневнутреннейпериферийнойповерхностимуфтыс концевойсторонытрубы. Минимальноезначение Lmin(мм) длины L резьбы (мм) врядахрезьбынаружнойконическойрезьбыи внутреннейконическойрезьбыопределяетсявыражением (1): Lmin= ((t × (D-t))/(αt× Dt/√3)) × коэффициентпрочности, идлина L резьбы (мм) врядахрезьбыудовлетворяетвыражению (2): Lmin× 1,0 ≤ L ≤ Lmin× 2,5. 2 ил., 1 табл.

公开(公告)号：SA517390021B1

公开(公告)日：2021-02-01

申请号：SA517390021

申请日：2017-09-25

Applicant: JFE STEEL CORP

Inventor： TAKANO JUN ,  TAKAHASHI KAZUNARI ,  KANAYAMA TARO ,  KAWAI TAKAMASA ,  YOSHIKAWA MASAKI ,  YONEYAMA TSUYOSHI

Abstract: يتعلقالاختراعالحاليبوصلةأنابيبملولبة threaded pipe joint فيهايتم،تحتتأثيرحملشد tensile load،تفاديالكسرعلىجانباللولبالمؤنث female thread side منجزءاللولبالأوللصفاللولبالثانيالمتواصلمعالكتفالأوسط intermediate shoulder ،ويحدثكسرالشدبالتأكيدعلىجانباللولبالمؤنثمنجزءاللولبالأوللصفاللولبالأول،الذيهوموضعالقطاعالعرضيالحرجالطبيعي. فيظلظرفيتعشقفيهاللولبانالمؤنثوالمذكر female and male threads للكتفالأوسطأحدهمامعالآخرتظل،فجوةلولب thread gap جانب-خاصرةالحمل load-flank-side إل 1جي L1G لصفاللولبالأولالذيهوصفاللولبالموجودعلىالجانبالداخليشعاعياًوفجوةلولبجانب-خاصرة-الحملإل 2جي L2G لصفاللولبالثانيالذيهوصفاللولبالموجودعلىالجانبالخارجيشعاعياً،معالكتفالأوسطالمتداخلفيمابينهما،تلبيشكل 1

公开(公告)号：CA3013300C

公开(公告)日：2020-05-05

申请号：CA3013300

申请日：2016-12-16

Applicant: JFE STEEL CORP

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

IPC: F16L15/04

Abstract: Provided is a threaded joint for an oil well tubing which possesses sufficient sealability when the external pressure is applied to the threaded joint by suppressing the plastic deformation of a nose portion and sufficient galling resistance. The sufficient galling resistance is provided by preventing the occurrence of galling at the time of making up the threaded joint during verification test performed in accordance with IS013679:2002 even when the threaded joint for an oil well tubing has a small thickness. Parameters including sizes of the threaded joint at positions of a seal point and shoulder portions satisfy the following formulae 1, 2 and Ls/Ln is set to 0.2 to 0.6. (Ds1 2-Ds0 2)/( D1 2-D0 2) >=0.30 ... (formula 1) tan.theta.> (.DELTA.D+6)/{2(Lt-Ls)} ... (formula 2)

公开(公告)号：CA3088237A1

公开(公告)日：2019-09-12

申请号：CA3088237

申请日：2019-02-14

Applicant: JFE STEEL CORP

Inventor： KAWAI TAKAMASA ,  YOSHIKAWA MASAKI ,  TAKANO JUN ,  NAGAHAMA TAKUYA ,  SEKI HARUHIKO

IPC: F16L15/04 ,  E21B17/042

Abstract: Provided is a screw joint for an oil well pipe in which the screw length of a joint portion is made more efficient, and with which machining time and installation time are reduced. The present invention provides an integral type screw joint for an oil well pipe, including a pin, obtained by providing a male threaded portion, which is a male tapered thread, at one end of a steel pipe, and a box, obtained by providing a female threaded portion, which is a female tapered thread that mates with the male threaded portion, at one end of a steel pipe, and provided in at least one location in an outer circumferential surface side seal portion of the pipe end side of the pin and an inner circumferential surface side seal portion of the pipe end side of the box with a construction that seals a fluid by metal contact between the pin and the box, wherein a minimum value Lmin (mm) of a screw length L (mm) in a thread row of the male tapered thread and the female tapered thread is defined by formula (1), and the screw length L (mm) in the thread row satisfies formula (2). (1) Lmin=((t×(D-t))/(at×Dt/v3))×joint efficiency (2) Lmin×1.0=L=Lmin×2.5

公开(公告)号：ES2677103T3

公开(公告)日：2018-07-30

申请号：ES12841901

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

Abstract: Una junta roscada para tuberías que comprende: un pasador (3) que incluye una porción (7) roscada externamente y un resalto (8) que se extiende desde la porción (7) roscada externamente hacia un extremo de una tubería; y una caja (1) que incluye una porción (5) roscada internamente y una cara periférica interior de un resalto, la porción (5) roscada internamente que forma una porción roscada al estar conectada de forma roscada con la porción (7) roscada externamente, la cara periférica interior del resalto enfrentada a una cara periférica exterior del resalto (8) del pasador (3), en donde, cuando el pasador (3) y la caja (1) están conectados de manera roscada entre sí y la cara periférica exterior del resalto (8) del pasador (3) y la cara periférica interior del resalto de la caja (1) se ponen en contacto metal a metal entre sí en una dirección radial en una porción de contacto, la porción de contacto sirve como una porción de sellado, en donde una relación δ/D de cantidad de interferencia de sellado de la porción de sellado en una dirección circunferencial de tubería es mayor que o igual a 0.002, donde D es un diámetro de sello definido como un diámetro exterior del pasador (3) en un punto de sellado que es un punto en la cara periférica exterior del resalto (8) del pasador (3), en la que la cara periférica exterior primero se pone en contacto con la cara periférica interior del resalto de la caja (1) y δ es una cantidad de interferencia definida como una cantidad por la cual el diámetro exterior en el punto de sellado se reduce por la caja (1) cuando el pasador (3) y la caja (1) se conectan de manera roscada entre sí, caracterizado porque se forma un recubrimiento que incluye un recubrimiento de aleación de Cu-Sn o un recubrimiento Cr que tiene una dureza Vickers mayor que o igual a 310 y menor o igual a 700 en la porción (5) roscada de la caja (1) y una cara interna de la caja (1) correspondiente a la porción de sellado.

公开(公告)号：CA3031919A1

公开(公告)日：2018-04-05

申请号：CA3031919

申请日：2017-09-13

Applicant: JFE STEEL CORP

Inventor： KAWAI TAKAMASA ,  KANAYAMA TARO ,  YOSHIKAWA MASAKI ,  TAKANO JUN ,  NAGAHAMA TAKUYA

IPC: F16L15/04

Abstract: Provided is a threaded joint for an oil well steel pipe having excellent sealing performance and compression resistance. The threaded joint has a pin 2 provided with a male screw 4, and a box 3 provided with a female screw 5 that screws together with the male screw 4. At an outer-circumferential seal section 9, a pin cross-sectional area S1 (mm2) at a seal point sp1 at a prescribed position and a cross-sectional area S0 (mm2) of an element pipe section which is a pin unprocessed section 6 satisfy the equation (S1/S0) × 100 = 15 (%). At an inner-circumferential seal section 10, a cross-sectional area S2 (mm2) of the box at a seal point sp2 at a prescribed position and a cross-sectional area S0'(mm2) of an element pipe section which is a box unprocessed section 7 satisfy the equation (S2/S0') × 100 = 20 (%). A cross-sectional area S3 (mm2) of a contact section 8 of an intermediate shoulder C between thread rows A and B and the cross-sectional area S0 (mm2) satisfy the equation (S3/S0) × 100 = 10 (%).