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

    Drill Collar Lifting Sub

    Drill Collar Lifting Subs

    Drill Collar Lift Subs are of one-piece construction and manufactured from alloy steel fully heat-treated. This heavy-duty type Drill Collar Lifting Sub is designed for use with the drill pipe elevators. The structure includes sloping shoulder and straight shoulder, which can be selected by customs. Drill Collar Lifting Subs are normally manufactured with length 1200mm long overall . However, this type sub can be made to any lengths desired. 
     

     

       

    NO.

    Normal Size
    mm(in)

    ID
    d/mm

    Connection
    API

    O.D. of Drill Pipe
    mm(in)

    O.D of End Elevate
    mm

    1

    73.0(2-7/8)

    31.8

    NC23

    79.4(3-1/8)

    111.1

    2

    44.5

    NC26

    88.9(3-1/2)

    3

    88.9

    (3-1/2)

    54.0

    NC31

    104.8(4-1/8)

    127.0

    4

    50.8

    NC35

    120.7(4-3/4)

    5

    68.3

    NC38

    127.0(5)

    6

    127.0(5)

    71.4

    NC44

    152.4(6)

    168.3

    7

    158.9(6-1/4)

    8

     

    NC46

    158.9(6-1/4)

    9

    82.6

    165.1(6-1/2)

    10

     

    171.5(6-3/4)

    11

     

    NC50

    177.8(7)

    12

     

    184.2(7-1/4)

    13

     

    NC56

    196.8(7-3/4)

    14

     

    203.2(8)

    15

    95.3

    6-5/8REG

    209.6(8-1/4)

    16

     

    NC61

    228.6(9)

    17

     

    7-5/8REG

    241.3(9-1/2)

    18

     

    NC70

    247.7(9-3/4)

    19

     

    254.0(10)

    20

     

    NC77

    279.4(11)

     

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