Non- magnetic drill collars According to API Spec.7 and SY/ T5144, the non-magnetic drill collars are made of low carbon stainless steel, which are researched and developed independently by our....
Introduction to company 1. Brief introduction Zhongyuan Special Steel Co., Ltd, built from 1970, is located at the foot of Wangwu mountain in west Jiyuan city, Henan province, and adjacent to....
Integral heavy weight drill pipe According to API Spec.7 and SY/ T5146, integral heavy weight drill pipe is made of alloy steel, and formed by hot forging as a whole and fully heat-treated. Tool....
Spiral drill collars Based on API Spec.7 and SY/ T5144, the spiral drill collars are made of 4145H modified chromium Cmolybdenum alloy steel. All threads are phosphated, copper zed or cold rolled.....
Drill collars 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....
Pipe mould , which was made from 21CrMo10 or 20-30CrMo , is the most important tool in the process of spheroidal cast iron pipe dies .we provide all kinds of pipe mould from DN80 to DN1000. Whatever....