Drill Collars
Our drill collars are made of 4145H modified chromium-molybdenum alloy steel acc. to API Spec.7 and SY/T5144. All threads are phosphated,copperized or cold worked. All Connections are equipped with pressed steel thread protectors. All threads are machined with CNC Lathes-Double-shouldered and special threads,the max spiral drill collars 14 inch.
ZYSCO has produced drilling tools for 30 years and ownsthe full product steel making, forging, machining, and heattreatment lines for drilling tools.
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Drill Collars | Our drill collars are made of 4145H modified chromium-molybdenum alloy steel acc. to API Spec.7 and SY/T5144. All threads are phosphated,copperized... |
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