Listing ID#10211662
CategoryMining Machinery
Quick answer
drill collar is a Mining Machinery product. Key specs — Origin: China (Mainland).
Product Description
According to API Spec.7 and SY/T5144, drill collar is made of AISI 4145 modified chromium- molybdenum alloy steel. All threads are phosphated, copperized or cold rolled , and they are machined with CNC Lathes Double shoulderd, including some special threads. The maximum outer diameter of drill collars can amount to 14 inch.
