API 7-1 3 1/2inch Nc38 Heavy Weight Drill Pipe

API 7-1 3 1/2inch Nc38 Heavy Weight Drill Pipe. API 7-1 Certified: Meets API 7-1, API 7-2, and SY/T standards for international compliance. Cold Rolling Threads: Threads processed with cold rolling for enhanced durability and precision. Custom Thread Options: Capable of machining double-shoulder and special non-standard thread specifications. 1-Year Warranty: Includes free replacement for quality issues and timely after-sales assistance. Full Drilling Tool Supply: Provides complete set including drill pipe, bits, hammers, and drilling equipment. Strict Quality Control: 100% inspection with advanced testing equipment before shipping. Flexible Customization: Accepts custom orders for logo, packaging, and specific product designs.