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  1. Unionlever (Group) Petroleum Equipment Co.,Ltd.

    Cross-Over Sub(Rotary Sub)

    Cross-Over Sub

    Cross-over sub acts for conversion and connection of drill stem component in petroleum, natural gas and geology drilling work.
    It is used mainly for connecting of upper drill tools and lower drill tools during drilling operations.

    The cross over sub in 4 types of main structure

    Sort

    Description

    Upper Connection Part

    Lower Connection Part

    Type

    1

    Kelly cross-over sub

    Kelly

    Drill pipe

    A or B

    2

    Drill pipe cross-over sub

    Drill pipe

    Drill pipe

    A or B

    3

    Interim cross-over sub

    Drill pipe

    Drill collar

    A or B

    4

    Drill collar cross-over sub

    Drill collar

    Drill collar

    A or B

    5

    Drill bit cross-over sub

    Drill collar

    Drill bit

    A or B

    6

    Swivel cross-over sub

    Swivel lower sub

    Kelly

    C

    7

    Fishing cross-over sub

    Kelly

    Drill pipe

    C

    Drill pipe

    Fishing tools

    C


        Type A stand for same diameter : one crossover sub has one size (D)on O.D., code A.
        Type B stands for reduce type: one crossover sub has two sizes (D1,D2) on O.D., code B.
        Type C is left hand thread type: the connection thread is left hand type, code C.



    Scification of Tubing Cross- Joint

    External Thread
    Internal Thread
    Thread Code Name
    Tapering
    Large End Diameter
    Small End
    Diameter
    I.D.
    (mm)
    Thread Code
    Name
    Tapering
    LargeEnd Diameter
    Small End Diameter
    I.D.
    (mm)
    1.900TBG
    1:16
    48.3
    47
    40.3
    1.900TBG
    1:16
    55.9
    66.1
    49.9
    2-3/8TBG
    1:16
    60.3
    59
    40.3
    2-3/8TBG
    1:16
    73.0
    58.1
    61.9
    2-7/8TBG
    1:16
    73
    70
    62
    2-7/8TBG
    1:16
    88.9
    70.8
    74.6
    3-1/2TBG
    1:16
    88.9
    86
    76
    3-1/2TBG
    1:16
    108.0
    86.7
    90.5
    4TBG
    1:16
    101.6
    98
    88
    4TBG
    1:16
    120.6
    98.5
    103.2
    4-1/2TBG
    1:16
    114.3
    111
    100.3
    4-1/2TBG
    1:16
    132.1
    111.2
    115.9
    4-1/2BCSG
    1:16
    114.7
    112
    100
    1.900UPTBG
    1:16
    63.5
    51.0
    54.8
    1.900UPTBG
    1:16
    53.2
    51
    40.3
    2-3/8UPTBG
    1:16
    77.8
    62.8
    67.5
    2-3/8UPTBG
    1:16
    65.9
    64
    50.3
    2-7/8UPTBG
    1:16
    93.2
    75.5
    80.2
    2-7/8UPTBG
    1:16
    78.6
    76
    62
    3-1/2UPTBG
    1:16
    114.3
    92.2
    96.9
    3-1/2UPTBG
    1:16
    95.2
    92
    75.9
    4UPTBG
    1:16
    127.0
    104.9
    109.6
    4UPTBG
    1:16
    108.0
    104
    88.6
    4-1/2UPTBG
    1:16
    141.3
    117.6
    122.3
    4-1/2UPTBG
    1:16
    120.6
    117
    100.3
     
     
     
     
     
     

    How to order Cross-over Subs
    When ordering, please specify:
    • O.D.,I.D., and length.
    • Connections, size, and type.

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