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    Drill Collar
    Drill Collar is shorted for DC. It is the basic component in the BHA which provides weight on the bit for drilling and keeps the drill string in tension.
    Material: AISI 4145H Mod.
    Type: Slick Drill Collar, Spiral Drill Collar and Non-Magnetic Drill Collar
    Standard: API, NS-1
    Hard Banding: Arnco 100XT, Arnco 300XT, TCS-8000, etc.
    Length: 9150–9450 mm
    Slip and elevator grooves, hand banding could be produced as per the customers’ requirements.
    Function:
    1.To increase the weight on the drilling bit
    2.To ensure the necessary strength of compression
    3.To reduce the vibration of the drill bit, swing, and beating, so that the drill bit working smoothly
    4.To control the deviation
    Please specify when ordering:
    ●Drill collar OD and ID;
    ●Overall length;
    ●Connections required (size and type);
    ●Type: Slick Drill Collar, Spiral Drill Collar or Non-Magnetic Drill Collar
    ●Stress relief groove
    ●Slip and / or Elevator Recess
    ●Hard banding
    Technical Parameters–Drill Collar
    Number and connection table Outside Diameter Inside Diameter
    Length mm
    Bevel Diameter mm
    Bending Strength Ratio
    mm in mm in
    NC23-3179.4 3 1/8 31.8
    1 1/2 915076.22.57:1
    NC26-35(2 3/8 IF)88.9 3 1/2 38.1 1 1/2 915082.92.42:1
    NC31-41(2 7/8 IF)104.8 4 1/8 50.8 2 9150100.42.43:1
    NC35-47120.6 4 3/4 50.8 2 9150114.72.58:1
    NC38-50(31/2IF)127 5 57.2 2 1/4 91501212.38:1
    NC44-60152.4 6 57.2 2 1/4 9150 or 9450144.52.49:1
    NC44-60152.4 6 71.4 2 13/16 9150 or 9450144.52.84:1
    NC44-62158.8 6 1/4 57.2 2 1/4 9150 or 9450149.22.91:1
    NC44-62(4IF)158.8 6 1/2 71.4 2 13/16 9150 or 94501502.63:1
    NC44-65(4IF)165.1 6 1/2 57.2 2 1/4 9150 or 9450154.82.76:1
    NC44-65(4IF)165.1 6 1/2 71.4 2 13/16 9150 or 9450154.83.05:1
    NC44-67(4IF)171.4 6 3/4 57.2
    2 1/4 9150 or 9450159.53.18:1
    NC50-672(41/2IF)171.4 6 3/4 71.4 2 13/16 9150 or 9450159.52.37:1
    NC50-70(41/2IF)177.8 7 57.2 2 1/4 9150 or 9450164.72.54:1
    NC50-70(41/2IF)177.8 7 71.4 2 13/16 9150 or 9450164.72.73:1
    NC50-72(41/2IF)184.2 7 1/4 71.4 2 13/16 9150 or 9450169.53.21:1
    NC56-77196.8 7 3/4 71.4 2 13/16 9150 or 9450185.32.70:1
    NC56-80203.2 8 71.4 2 13/16 9150 or 9450190.13.02:1
    6 5/8 REG209.6 8 1/4 71.4 2 13/16 9150 or 9450195.72.93:1
    NC61-90228.6 9 71.4 2 13/16 9150 or 9450212.73.17:1
    7 5/8 REG241.3 9 1/2 76.2 3 9150 or 9450223.82.81:1
    NC70-97247.6 9 3/4 76.2 3 9150 or 9450232.62.57:1
    NC70-100254 10 76.2 3 9150 or 9450237.32.81:1
    8 5/8 REG279.4 11 76.2 3 9150 or 9450266.72.84:1
    Slips and elevator grooves can be produced upon the customers’ requirement.

    If you have any further requirements, please feel free to contact us by sales@sxgtpm.com
    Within those famous China oil and gas drill collar manufacturers, GAOTON is a professional such supplier, producer and provider, welcome to wholesale petroleum and oilfield API drill collar from our factory.Down Hole Tools factory
    website:http://www.gaotondrillings.com/down-hole-tools/