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Drill Collar

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 inch to 11inch, Length from 10ft to 31ft
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Overview



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 3/47589651328534154
7116899301328534154



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 3/475882718

7 ~ 1168975820