Wear-resisting and lengthen Drill Collars
Category:
Petroleum Drilling Tools
Brief description:
Key words:
Product Description
Product Description
Wear-resisting and lengthened drill collars is made from AISI 4145H modified chromium molybdenum alloy steel.
acc. to API Spec.7. and SY/T5144. All threads are phosphated, copperized or cold worked.
+86 866358882101
olivia@sdtuoda.com 
+86 13290268388 
Address：D5-C Baililai Luanhe Road Dongchangfu District Liaocheng Shandong.
E-Mail：olivia@sdtuoda.com
Tel：+86 6358882101
Whats APP：+86 13290268388
