Heavy-Wall OCTG Drill Pipe 6-5/8" Od, 0.500" Wt for Hpht Deepwater Drilling. High-Grade Material Options: Available in E-75, X-95, G-105, and S-135 grades for HPHT deepwater drilling. Wide OD Range: Outer diameter ranges from 60.3mm to 168.3mm to suit various drilling needs. Strict Quality Standards: Complies with ISO11960 and API 5CT standards with rigorous inspection. Customizable Specifications: Wall thickness and length can be customized according to customer requirements. Experienced Manufacturer: Over 10 years of experience supplying steel pipes to major oil & gas companies. Sample Availability: Samples are available upon request to ensure product quality before bulk order.