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Extreme High Torque T&C with advanced premium performances

VAM® HTTC is the most advanced T&C design in the VAM® product family. Thanks to its optimized self-locking, dovetail thread concept, it combines running reliability, ultra-high torque capacity and ample bending margin, while always ensuring the highest sealability performances. The entire product line is validated against API RP 5C5:2017 / ISO 13679:2019 CAL-IV, including at MTS (Maximum Torque with Sealability).

Ultra-High Torque
Preserved structural performances and sealability when rotating the string through highly deviated and long lateral section.
Highest proven performances
Large performance envelope validated against most recent and rigorous protocols.
Simple and reliable
Running practices are similar to a standard premium connection.
Performance, Application & Product Range


  • Internal pressure rating: 100% pipe body
  • Collapse rating: 100% API 5C3 (or HC)
  • Tension capacity: 100% pipe body with sealability
  • Compression capacity: 80% pipe body with sealability (and structural resistance to 100% pipe body)
  • Bending capacity up to 42°/100 ft under combined loads
  • Gas sealability validated as per API RP 5C5:2017 / ISO 13679:2019 CAL-IV, including at Maximum Torque with Sealability (MTS)
  • Simple, reliable and easy running (running practices similar to standard premium connections)
  • Recess-free bore as a standard feature for all sizes


VAM® HTTC is the first choice for any application requiring ultra-high torsional resistance while preserving the highest levels of sealability:

  • HPHT wells
  • Extended Reach Drilling (ERD) and horizontal wells with long laterals
  • Drilling with Casing / Reaming with Casing
  • Rotating while cementing
  • Production casing, tie-backs and liners
Product Range
Product Range
  • Available in sizes from 3-1/2″ to 10-3/4″
  • Carbon Steels including SS and HC grades, 13Cr, S13Cr and Corrosion Resistant Alloys
  • Yield Strengths from 80 to 125 ksi
  • Available with CLEANWELL®, the VAM® dope-free solution
Discover VAM® HTTC
Documents & Resources
VAM® HTTC Running Guidelines Poster
To help you optimize our connections' running, we have developed a dedicated poster summarizing running recommandations from our VAM® Field Service teams. To download it, please fill in the form below.
Customer Stories
Middle East
  VAM® HTTC CLEANWELL®: successful first running in High Torque Liner applications in the Middle East. In total, over 1,500 joints, equivalent to more than 18km, have been used so far, which were successfully prepared and run in hole with no rejects and presented remarkable stability during make-up. “Easy to run, CLEANWELL® saved us time during running, with very few breakouts while providing excellent gas tight sealing.” VAM® Field Service technician, Product running supervision
Western Texas


"With over 28,000 joints run in Western Texas and a backout rate below 0.3%, VAM® HTTC has proven to be an extremely robust and effective solution for long reach wells requiring very high torque resistance." VAM® Field Service, running of 4-1/2", 5" and 5-1/2" VAM® HTTC in West Texas Permian

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