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13 条记录 (耗时 0.008 秒)

    THREADED PIPE JOINT
    1.
    发明公开
    THREADED PIPE JOINT 审中-公开

    公开(公告)号：EP3246611A4

    公开(公告)日：2018-01-24

    申请号：EP15877747

    申请日：2015-11-24

    申请人： JFE STEEL CORP

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

    IPC分类号： F16L15/04 ,  E21B17/042

    CPC分类号： E21B17/042 ,  F16L15/04

    摘要： 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.

    THREADED JOINT FOR PIPE
    3.
    发明公开
    THREADED JOINT FOR PIPE 审中-公开

    公开(公告)号：EP2937612A4

    公开(公告)日：2016-04-06

    申请号：EP13875099

    申请日：2013-12-18

    申请人： JFE STEEL CORP

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

    IPC分类号： F16L15/04 ,  E21B17/042

    CPC分类号： F16L15/06 ,  E21B17/042 ,  F16L15/004

    摘要： 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.

    THREADED JOINT FOR OIL WELL PIPE
    4.
    发明公开
    THREADED JOINT FOR OIL WELL PIPE 审中-公开
    螺纹连接片用于油孔管

    公开(公告)号：EP3009725A4

    公开(公告)日：2016-06-15

    申请号：EP14811719

    申请日：2014-06-09

    申请人： JFE STEEL CORP

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

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

    CPC分类号： E21B17/042 ,  F16L15/004 ,  F16L15/06

    摘要： 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.

    THREADED COUPLING FOR PIPE
    5.
    发明公开
    THREADED COUPLING FOR PIPE 有权
    螺纹连接管

    公开(公告)号：EP2682658A4

    公开(公告)日：2016-05-11

    申请号：EP12752067

    申请日：2012-02-24

    申请人： JFE STEEL CORP

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

    IPC分类号： E21B17/042

    CPC分类号： F16L15/00 ,  E21B17/042 ,  F16L15/001 ,  F16L15/06

    摘要： Radial seal type threaded joints for steel pipes have still room for improvement in ensuring sealability in terms of the rigidity of the pin nose. Specifically, the outer circumferential surface of the nose 8 of the pin 3 has an outward convex curved shape, and the sealing surface of the box 1 has a tapered shape; and the cross-sectional area of the pin 3 at a seal point sp that is a portion on the outer circumferential surface of the nose 8 of the pin 3, the portion first coming into contact with the sealing surface of the box 1 when threaded-joined, is 35% or more of the cross-sectional area of an original pipe portion corresponding to an unprocessed portion.