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    Threaded joint for oil well tubing
    1.
    发明授权
    Threaded joint for oil well tubing 有权

    公开(公告)号：US10900595B2

    公开(公告)日：2021-01-26

    申请号：US16077912

    申请日：2016-12-16

    Applicant: JFE Steel Corporation

    Inventor： Takamasa Kawai ,  Taro Kanayama ,  Masaki Yoshikawa ,  Haruhiko Seki ,  Masateru Ueta ,  Jun Takano ,  Tsuyoshi Yoneyama

    IPC: F16L15/04 ,  E21B17/042

    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 ISO13679:2002 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 formula 1 ((Ds12−Ds02)/(D12−D02)≥0.30), formula 2 (tan θ>(ΔD+δ)/{2(Lt−Ls)}), and Ls/Ln is set to 0.2 to 0.6.

    THREADED JOINT FOR PIPES
    4.
    发明申请
    THREADED JOINT FOR PIPES 审中-公开
    螺纹连接管

    公开(公告)号：US20150198270A1

    公开(公告)日：2015-07-16

    申请号：US14412286

    申请日：2013-07-01

    Applicant: JFE STEEL CORPORATION

    Inventor： Takuya Nagahama ,  Kazunari Takahashi ,  Hiroshi Chikatsune ,  Masaki Yoshikawa ,  Jun Takano ,  Takamasa Kawai ,  Masateru Ueta

    IPC: F16L15/00

    CPC classification number: F16L15/00 ,  E21B17/042 ,  E21B17/08 ,  F16L15/004 ,  F16L15/06 ,  F16L2201/40

    Abstract: A threaded joint for pipes is provided in which a box-side lip length L, which is the axial distance between a pin-nose-end corresponding point P of the box component 1 and a load surface 18b of a lip-side internal thread ridge 50 closest to the pin-nose-end corresponding point P, is 300 or more times as long as an insertion surface interval δ, which is the axial interval between an insertion surface 19b of an internal thread ridge at a position two or more ridges backwards from the lip-side internal thread ridge 50 and an insertion surface 19a of an external thread ridge facing the insertion surface 19b when tightened, that is, L≧300×δ.

    Abstract translation: 提供了一种用于管道的螺纹接头，其中盒侧唇长度L是箱部件1的销鼻端对应点P与唇侧内螺纹脊的载荷面18b之间的轴向距离 最接近针鼻端部对应点P的距离为距离位于两个或更多个脊部的内螺纹脊的插入表面19b之间的轴向间隔的插入表面间隔δ的300倍或更多倍的300倍或更多倍 从唇缘内螺纹脊50和紧固插入面19b的外螺纹的插入面19a，即L≥300×δ。

    Threaded joint for oil country tubular goods
    6.
    发明授权
    Threaded joint for oil country tubular goods 有权

    公开(公告)号：US09982491B2

    公开(公告)日：2018-05-29

    申请号：US14896754

    申请日：2014-06-09

    Applicant: JFE Steel Corporation

    Inventor： Takamasa Kawai ,  Kazunari Takahashi ,  Hiroshi Chikatsune ,  Masaki Yoshikawa ,  Jun Takano ,  Takuya Nagahama ,  Masateru Ueta

    IPC: E21B17/042 ,  F16B33/02 ,  F16L15/00 ,  F16L15/06

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

    Abstract: A threaded joint for an oil country tubular goods includes pins each of which occupies a pipe end portion of a steel pipe for an oil country tubular goods, and includes an externally-threaded portion, a nose extending toward a pipe end side from the externally-threaded portion, and a shoulder forming a distal end of the nose; and a box including internally-threaded portions each forming a threaded portion by being threadedly joined with the externally-threaded portion, and shoulders brought into contact with the shoulders of the pins, wherein the pins and the box being joined to each other by the threaded joining so that portions between the threaded portions and the shoulders are brought into metal-to-metal contact with each other to thereby form seal portions at the contact portions, and the shoulders of the pins and the shoulders of the box forming shoulder faces are brought into contact with each other at the time of make-up of the threaded joint, and a ratio of a chamfer length of pin thread to a thread pitch is 1.0 or more to 3.0 or less.

    THREADED JOINT FOR OIL COUNTRY TUBULAR GOODS (AS AMENDED)
    8.
    发明申请
    THREADED JOINT FOR OIL COUNTRY TUBULAR GOODS (AS AMENDED) 审中-公开
    用于油类国家管件的螺纹接头（如修订）

    公开(公告)号：US20160130884A1

    公开(公告)日：2016-05-12

    申请号：US14897802

    申请日：2014-06-09

    Applicant: JFE STEEL CORPORATION

    Inventor： Takamasa Kawai ,  Kazunari Takahashi ,  Hiroshi Chikatsune ,  Masaki Yoshikawa ,  Jun Takano ,  Takuya Nagahama ,  Masateru Ueta ,  Hideo Sato ,  Haruhiko Seki ,  Tsuyoshi Yoneyama

    IPC: E21B17/042 ,  F16L15/06

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

    Abstract: In a joint for oil country tubular goods, a pitch change is made such that an internally-thread pitch has the same value as an externally-thread pitch from a thread end portion on a box end side to a pitch change position taken on a box center side with respect to a position away from the thread end portion by ½ 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 so that a thread gap is gradually decreased from the pitch change position to a position 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 before the pitch change is made.

    Abstract translation: 在用于油井管状物品的接头中，进行间距改变，使得内螺纹节距具有与从箱端侧的螺纹端​​部到盒子上的间距变化位置的外螺纹间距相同的值 中心侧相对于远离螺纹端部的位置的螺纹部分的整个长度的1/2，并且内螺纹节距改变为小于在间距变化位置处的外螺纹间距的值，使得 螺纹间隙从间距变化位置逐渐减小到箱体中心侧的螺纹端​​部的位置，螺纹间隙最终设定为间距变化前的螺纹间隙的0.2〜0.8倍的值 是做的

    Threaded pipe joint
    9.
    发明授权
    Threaded pipe joint 有权

    公开(公告)号：US10711533B2

    公开(公告)日：2020-07-14

    申请号：US15561778

    申请日：2016-03-28

    Applicant: JFE Steel Corporation

    Inventor： Masaki Yoshikawa ,  Kazunari Takahashi ,  Taro Kanayama ,  Jun Takano ,  Takamasa Kawai ,  Tsuyoshi Yoneyama

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

    Abstract: A threaded pipe joint, when acted upon by a tensile load, does not break on the female thread-side of a first thread section of a second thread series that extends from an intermediate shoulder. The threaded pipe joint reliably undergoes tensile rupture on the female thread-side of a first thread section of a first thread series, which is the original critical cross-section site. The threaded pipe joint is configured so that when the male and female threads of the intermediate shoulder are screwed together, the load flank-side thread gaps L1G and L2G of a first thread series, which is the radially inward thread series, and a second thread series, which is the radially outward thread series, on the two sides of the intermediate shoulder always satisfy the relationship L1G

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