Drilling string

Investment casting: silicasol investment casting, composite investment casting ( mixture of silicasoland water-glass investment casting) water-glass investment casting

Casting tolerance: CT5-CT9

Material : Carbon steel, stainless steel and heat resistant steel, alloy steel

Output per year: 6000tons

Surface finish: shot blasting, polishing, painting, powder coating, galvanizing, passivating, pickling.