Purchase Qty. Reference FOB Price
1-99 Pieces US$10.00
100-999 Pieces US$9.00
1,000+ Pieces US$5.00
Product Description
Product Describe Use: Casing coupling is a drilling tool in the oil field, mainly used for casing connection. The casing coupling mainly solves the problem that the existing coupling is prone to fatigue fracture due to stress concentration. Structure: The casing end is connected with the inner wall ...