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Contact Us
- Contact Person : Mr. li jian
- Company Name : Henan Zhongyuan Roller Shaft Co., Ltd.
- Tel : 86-0391-2191064
- Fax : 86-0391-6609092
- Address : Henan,Jiyuan,jiyuan city Henan Province
- Country/Region : China
- Zip : 454652
Spiral drill collars
Product Detailed
Related Categories:Mining Machinery Parts
Detailed Product Description
Based on API Spec.7 and SY/T5144, the spiral drill collars are made of 4145H modified chromium molybdenum alloy steel. All threads are phosphated, copper zed or cold rolled. All threads machined with CNC Lathes Double shoulderd, including some special threads. The maximum outer diameter of drill collars can amount to 14 inch.
