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Dongliuyang,Jiyuan,Henan,China China
Drill Collars are the most important parts of drilling string elements. The performance of drill collars will effect the efficiency of drilling. Zyzxd
We apply table roller, levelling roller, corrugated roller, working roller, motor shaft, connecting shaft, elevator plug, pipe casting die, with perfe
Detailed Product Description Based on API Spec.7, ZYZXDYs drill collars are made of 4145H MOD chromium molybdenum alloy steel. All threads mac
Contact Person Ms. Jenny lee
Address Dongliuyang, Jiyuan, Henan
We will contact you soon .
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