Spiral Drill Collar

Detailed Product Description

The spiral drill collars are made of 4145H modified chromium-molybdenum alloy steel acc. to API Spec.7 and SY/t5144. All threads are phosphated, coppperized or cold worked. All threads are machined with CNC Lathes-Double-Shouldered and special threads, the max diameter of drill collar is 14 inch.

Place of Origin:	Henan in China
Model No:	31/8
Brand Name:	Zhengyuan
Minimum Order:	Piece/Pieces 1
Supply Ability:	Piece/Pieces\|500000\|Year