drill collar

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drill collar
Posting date : Aug 01, 2013
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HS-CODE
72-
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Detailed Description
The drill collars are made of 4145H modified chromium-molybdenum alloy steel acc.to API Spec.7 and SY/T 5144.All threads can be phosphated, copperized or cold worked. All threads are machined with CNC Lathes-Double-shouldered and special threads. And a special the max diameter of drill collar is 14 inch

ECROBOT CO., Ltd, Business Registration Number : 220-88-71747, CEO J.W.Park, TEL : +82-2-552-7676, E-mail : E-mail : Contact us
Address : (Hwanghwa B/D 11F, Yeoksam-dong)320, Gangnam-daero, Gangnam-gu, Seoul, South Korea
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