Drill Collar is one of the most important components of the drill string, which providing pressure on drill bits. 

    The production and inspection standard is API 7, API 7-1. The material of the drill collar can be AISI 4145 H or Non-magnetic material.
    Landrill provide you all kinds of drill collars like Slick drill collars and Spiral drill collars, OD sizes from 3 1/8”-11”, Length from 10’-31’

    drill collar, drill string, drilling,oilfield,forging

    Mechanical Property of Slick and Spiral drill collars:
    OD Range (in) Yield Strength (MPa) Tensile Strengt h (MPa) Elongation (%) Hardness (HB) Impact Test (J)
    3 1/8 ~6 3/4
    Mechanical Property of Non-mag Drill Collars:
    OD Range (in) Yield Strength (Mpa) Tensile Strength (Mpa) Elongation (%) Hardness (HB) Impact Test (J)
    3 1/8 ~ 6 3/4
    7 ~ 11



    Other drilling string products: 

    PDC Drill bits Stabilizer Rotary Reamer
    Mud Motor Drill Collar Heavy Weight Drill Pipe
    Hole Opener Drilling jar Jar Intensifier
    Shock Absorber Slide Reamer Variable Gauge Stabilizer

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