Threaded joint for pipes
    3.
    发明授权

    公开(公告)号:US11905765B2

    公开(公告)日:2024-02-20

    申请号:US17757722

    申请日:2020-09-11

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

    Abstract: To prevent fracture of a box under a tensile load without increasing the outer diameter of the box. The presently disclosed threaded joint for pipes includes a pin provided with a male thread portion at one end of a first pipe, and a box provided with a female thread portion at one end of a second pipe, where each of a plurality of thread grooves of the female thread portion has a corner portion on a load flank side and a corner portion on a stabbing flank side on a thread bottom side, a corner portion on a load flank side of a first thread groove includes a first arc portion that has a first curvature radius, and a second arc portion that has a second curvature radius, and a ratio of the second curvature radius to the first curvature radius is 3 or more.

    High torque threaded connections with triple taper thread profiles

    公开(公告)号:US11898666B1

    公开(公告)日:2024-02-13

    申请号:US17817864

    申请日:2022-08-05

    CPC classification number: F16L15/06 F16L15/002

    Abstract: A threaded connection includes a first tubular member having a pin end defining an external thread profile, and a second tubular member having a box end defining an internal thread profile threadably engageable with the external thread profile of the pin end. At least one of the external and internal thread profiles includes a first section that extends at a first taper angle relative to a longitudinal axis of the threaded connection, a second section extending from the first section at a second taper angle relative to the longitudinal axis, and a third section extending from the second section at a third taper angle relative to the longitudinal axis. The second taper angle is greater than each of the first and third taper angles.

    TUBE FITTING
    5.
    发明公开
    TUBE FITTING 审中-公开

    公开(公告)号:US20240003468A1

    公开(公告)日:2024-01-04

    申请号:US18253811

    申请日:2021-08-26

    CPC classification number: F16L15/04 F16L15/06 F16L19/025

    Abstract: One of an external thread of a fitting body and an internal thread of a sleeve includes two thread ridges and the other includes two thread grooves. The two thread ridges have transverse cross sections different in shape or size. A transverse cross section of the first thread groove allows that of the first thread ridge to be fit thereinto. A transverse cross section of the second thread groove prevents that of the first thread ridge from being fit thereinto but allows that of the second thread ridge to be fit thereinto. A leading portion of the second thread ridge is tapered in width. A leading portion of the first thread groove is inversely tapered in width. A leading portion of the first thread ridge has a transverse cross section that extends beyond a transverse cross section of the leading portion of the second thread groove.

    THREADED JOINT OF PIPE AND METHOD FOR CONNECTING SAME

    公开(公告)号:US20230383875A1

    公开(公告)日:2023-11-30

    申请号:US18044990

    申请日:2020-09-30

    CPC classification number: F16L15/04 F16L15/06

    Abstract: A threaded joint wherein a relationship between shoulder angle parameters and thread taper angle parameters for a coupling and a pair of pins inserted from both ends of the coupling is defined by the following expression (1), and a tightening torque with which the threaded joint is tightened is 60% or more and 85% or less of a yield torque determined by the following expression (2):










    -
    1.5


    °




    Δ

    θ

    -

    Δ

    ω




    2.
    °


    ,




    (
    1
    )












    T
    =


    (


    T
    S

    +

    T
    D


    )



    1
    12







    (
    2
    )











    T
    S

    =


    f
    t



    P
    c




    E
    7

    2



    (

    2

    π



    E


    7


    )



    L
    4



    1
    2









    P
    c

    =

    E



    ρ
    m

    2





    (



    (

    W
    2

    )

    2

    -


    (


    E
    7

    2

    )

    2


    )



    (



    (


    E
    7

    2

    )

    2

    -


    (

    d
    2

    )

    2


    )



    2



    (


    E
    7

    2

    )

    3



    (



    (

    W
    2

    )

    2

    -


    (

    d
    2

    )

    2


    )











    T
    D

    =


    Y
    m





    A
    S

    (


    P

    2

    π


    +



    R
    t



    f
    s



    cos

    Θ


    +


    R
    s



    f
    s



    )

    .

    THREADFORM HAVING CREST TO ROOT THREAD COMPOUND RELIEF AREAS

    公开(公告)号:US20190195029A1

    公开(公告)日:2019-06-27

    申请号:US16227353

    申请日:2018-12-20

    Inventor: ALEJANDRO JUAREZ

    CPC classification number: E21B17/042 F16L15/006 F16L15/06 F16L15/08

    Abstract: A connection includes a first tubular member having a first screw threadform defined by a first plurality of crests, roots, and flanks, where each flank separates each crest from each root. The connection also includes a second tubular member having a second screw threadform defined by a second plurality of crests, roots, and flanks, where each flank separates each crest from each root. The crests and roots are substantially axial to the tubular members and the flanks are substantially radial to the tubular members. The first tubular member and the second tubular member are configured to connect when the first threadform engages with the second threadform. Thread compound relief spaces are formed between the first plurality of crests and the second plurality of roots when the first and second tubular members connect.

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