The evolution of drilling programs has driven the industry to develop innovative solutions for extreme conditions such as Sour Service environments. Here, specially designed drill pipes are essential to provide the necessary H₂S resistance within the steel and to ensure the safety of those working in such harsh environments.

Vallourec & Mannesmann Sour Service proprietary grades are renowned for their performance. This is reflected in the extensive research and development facilities, which are combined with our internationally recognized expertise in order to produce outstanding critical service material. Today, VAM Drilling is able to guarantee the superior performance of its material in the toughest sour environments around the world.

Due to the astringency of the sour environment, particular attention needs to be paid when selecting and characterizing adapted Sour Service steel grades. Controlling critical manufacturing parameters is also a requirement to ensure superior product performance. Steel microstructure, chemical composition, cleanliness and heat treatment process control are essential for high sulfide stress cracking resistance.

• MS level: Mild Sour
• S level: Intermediate Sour
• SS level: Severe Sour – the SS level is fully compliant with IRP 1.8 requirements