
Minerdl DTH Spiral Drill Pipe 89mm. High-Strength Alloy Steel: Made of high-strength alloy steel with high torsion and wear resistance. Customizable Specifications: Supports customized length, diameter, and joint type for various needs. 100% Quality Inspection: Welds are 100% inspected using in-house methods to ensure quality. Advanced Heat Treatment: Nitriding tool joint suitable for soft soil, sand layer, and hard rock. ISO 9001:2000 Certified: Manufacturing process meets ISO 9001:2000 certification standards. Forging Manufacturing: Produced via forging process for enhanced structural integrity. Spray-Paint Surface: Surface treated with spray-paint for durability and protection. 3 Months Warranty: Provides a 3-month warranty period for peace of mind.