Core Steel Works
Menu
ProductsQualityWhy JiyuanKnowledgeRequest a Quote

Knowledge Center / Sourcing from China

Sourcing from China

How to qualify suppliers, structure RFQs and inspect orders when buying from China.

Drilling Tools

Jul 18, 2026

How to Buy API 7-1 Drill Collars from China

A practical sourcing guide: what API Spec 7-1 covers, how to qualify a Chinese drill collar manufacturer, which documents to demand, and the exact information to put in your RFQ.