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drill collar
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drill collar

3 1/2"-14"
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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.

drill collar, oil drill collar,

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HENAN WEIN INDUSTRY CO.,LTD

drill pipe,drill collar,stabilizer

Address: Room1403, Building No.10,Jincheng Oriental International, CBD Neihuan Road,Zhengdong New District, Zhengzhou,450046, P.R.China,
zhengzhou, HENAN
China, 450046

Tel: 0086-371-65807517
Fax: 0086-371-65807519

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