Seamless tubes made from solid steel billets through piercing, hot rolling/cold drawing, specifically designed for geological surveys, mineral exploration, core drilling, well drilling, engineering pile foundations, and mining drilling applications.
Product specifications: 4-1/4" ~ 8-5/8"
Steel Grades: ZT380, ZT490, ZT590, ZT740
High-strength seamless pipes specifically designed for geological exploration drilling, leveraging their seamless construction, high strength, superior toughness, and resistance to torsion and wear, ensuring safe, efficient, and durable drilling operations.
It is seamless overall, with superior resistance to high pressure, torsion, and impact compared to welded pipes, eliminating the risk of seam cracking.
Constructed from high-quality carbon structural steel and alloy steel, it exhibits comprehensive mechanical performance after heat treatment, making it suitable for hard rock layers and fractured strata.
It features excellent internal and external diameter roundness, uniform wall thickness, high concentricity in drilling, minimal deviation, smooth drilling and withdrawal operations, and is less prone to sticking.


Seamless overall formation ensures minimal risk of fracture, bulging, or pipe explosion during drilling operations, thereby reducing wellbore accidents.
Uniform wall thickness, excellent internal and external roundness, ensuring concentricity of drilling tools, reducing the risks of deviation and sticking.
It adopts ZT series alloy steel material, which undergoes quenching and tempering heat treatment, offering high strength and excellent fatigue resistance.
With long-term expertise in the manufacturing of OCTG, we possess advanced equipment and large-scale production capabilities, enabling us to consistently deliver high-quality products.
With long-term expertise in the manufacturing of OCTG, we possess a reliable quality control system, ensuring stable and dependable product quality.
A professional technical service team, providing 24-hour response and on-site technical support for pipe construction operations, ensuring long-term efficient equipment operation.