HYST provides all types of drill tube products with all steel grades and tube end types following API SPEC 5DP standard, including E, X, G and S steel grades, as well as EU/IU/IEU tube end types. The product size covers all outer diameter and wall thickness specifications in API SPEC 5DP standard and PSL 1, PSL 2 and PSL3 specifications. Our products have high strength, high toughness and high torsional strength, and can bear huge internal and external pressure, distortion, bending and vibration, providing mud channel, transfer tension and torque for oil well drilling.