Technical specifications and application scope of the GB/T 9808 standard
This standard regulates the requirements for the production and operation of seamless steel pipes intended for drilling operations of varying complexity. The document establishes comprehensive standards regarding geometric parameters, limit deviations, physical and mechanical properties of steel, quality control procedures, testing methods, as well as protocols for marking, packaging, and the preparation of accompanying documentation.
Solutions supplied by EV Group China strictly comply with the provisions of GB/T 9808 and are applied in the following industries:
- Geological core drilling in complex geological conditions.
- Deep water well drilling for industrial and municipal water supply.
- Hydrogeological surveys and engineering geological studies.
- Production of drill strings, casing pipes, and core barrels.
- Manufacturing of drill collars and connection drilling equipment elements.
The engineering department of EV Group China provides seamless rolled products that possess high fatigue strength and resistance to torsional loads, which is critical for ensuring the reliability of drill strings when operating at great depths.