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Drill Collar

KOSUN Drill Collars are manufactured from AISI 4145H alloy steel. Drill collars are bored and drifted to API Spec 7-1 and fully heated to meet or exceed the mechanical property requirements of API Spec 7-1. Hardness range of 285-341HB and a charpy "V" notch impact value of 54 joules are guaranteed one inch below the surface.

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Tel: +86 029 87304914(International Sales) +8613891934239(Domestic Sales) E-mail:business@adkosun.com

Drill Collar

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For product information and pricing,chat with sales agent:

  • +7 7132 568947
  • business@adkosun.com
  • +7 7132 562000

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