VAM® Risers represent the speciallized thread and pipe grades developed by Vallourec over the last twenty years for the unique fatigue enviroment experienced by top tensioned risers in the offshore oil and gas industry.
They represent two full product lines —the VAM TOP® FE and VAM® TTR— as well as seven tailor made products matching the full scope of the market needs. These fully developed products have extensive field running experience in the high pressure drilling, dry tree production, and completion/workover and intervention riser applications.
Top Tension Risers experience several challenges including:
Each of these challenges, as expressed by our clients, are addressed through specific design of pipe and connections as well as a reactive support.
Vallourec has addressed each of the challenges for riser applications as follows:
Specialized connections have been designed with patented reductions to stress concentration factors within the thread, seal, and coupling design. These designs allow Vallourec to achieve a very high fatigue life of SAF ≤ 1.5 and SAF ≤ 2.0 vs. DNV B1 curve for VAM® TTR and VAM TOP® FE respectively. The connections have also been designed to meet the multiple Make & Break requirements of drilling and workover applications, achieving up to 25 M&B. All of these performances have been validated through Vallourec's world leading Research & Development department.