Dill Collar Dill Collar

Dill Collar

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Forging series

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  • Description
  • Device parameters
    • Commodity name: Dill Collar
    • Commodity ID: 1133099509169672192

    Mechanical properties of drill collars

    Outer diameter range

    Yield strength R t

    Tensile strength R m

    Elongation A%

    Brinell hardness HB

    Charpy impact energy AkvJ

    mm

    in

    MPa

    MPa

     

     

     

    79.4 — 171.4

    3 1/8 — 6 3/4

    ≥758

    ≥965

    ≥13

    285 — 341

    ≥54 or ≥70

    177.8 — 279.4

    7 — 11

    ≥689

    ≥930

    ≥13

    285 — 341

    ≥54 or ≥70

    chemical composition

    Grade

    Chemical composition %

    C

    Si

    Mn

    P

    S

    Cr

    Mo

    Ni

    Cu

    Al

    V

    4145HMOD

    0.42   ～

    0.49

    0.15 ～0.35

    1.00 ～1.25

    ≤ 0.025

    ≤ 0.025

    1.00 ～1.35

    0.30-0.35

    ≤ 0.25

    ≤ 0.35

    ≤ 0.05

    0.03 ～0 . 08

     

  • Drill collar specifications OD ID Length Length Chamfer diameter Champher Reference curved Bending strength Proportion
    mm in mm in   mm Intensity ratio
    NC23-31 79.4 3 1/8 31.8 11/4 9150 76.2 2.57:1
    NC26-35(2 3/8IF) 88.9 3 1/2 38.1 11/2 9150 82.9 2.42:1
    NC31-41(2 7/8IF) 104.8 4 1/8 50.8 2 9150 100.4 2.43:1
    NC35-47 120.7 4 3/4 50.8 2 9150 114.7 2.58:1
    NC38-50(3 1/2IF) 127.0 5 57.2 2 1/4 9150 or 9450 121.0 2.38:1
    NC44-60 152.4 6 57.2 2 1/4 9150 or 9450 144.5 2.49:1
    NC44-62 158.8 6 1/4 57.2 2 1/4 9150 or 9450 149.2 2.91:1
    NC44-62(4IF) 158.8 6 1/4 71.4 2 13/16 9150 or 9450 150.0 2.63:1
    NC46-65(4IF) 165.1 6 1/2 57.2 2 1/4 9150 or 9450 154.8 2.76:1
    NC46-65(4IF) 165.1 6 1/2 71.4 2 13/16 9150 or 9450 154.8 3.05:1
    NC46-67(4IF) 171.4 6 3/4 57.2 2 1/4 9150 or 9450 159.5 3.18:1
    NC50-67(4 1/2IF) 171.4 6 3/4 71.4 2 13/16 9150 or 9450 159.5 2.37:1
    NC50-70(4 1/2IF) 177.8 7 57.2 2 1/4 9150 or 9450 164.7 2.54:1
    NC50-70(4 1/2IF) 177.8 7 71.4 2 13/16 9150 or 9450 164.7 2.73:1
    NC50-72(4 1/2IF) 184.2 7 1/4 71.4 2 13/16 9150 or 9450 169.5 3.12:1
    NC50-77 196.8 7 3/4 71.4 2 13/16 9150 or 9450 185.3 2.70:1
    NC50-80 203.2 8 71.4 2 13/16 9150 or 9450 190.1 3.02:1
    6 5/8REG 209.6 8 1/4 71.4 2 13/16 9150 or 9450 195.7 2.93:1
    NC61-90 228.6 9 71.4 2 13/16 9150 or 9450 212.7 3.17:1
    7 5/8REG 241.3 9 1/2 76.2 3 9150 or 9450 223.8 2.81:1
    NC70-97 247.6 9 3/4 76.2 3 9150 or 9450 232.6 2.57:1
    NC70-100 254.0 10 76.2 3 9150 or 9450 237.3 2.81:1
    8 5/8REG 279.4 11 76.2 3 9150 or 9450 266.7 2.84:1

     

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