DWC/C is the original Threaded and Coupled (T&C) solution for casing rotation applications that exceed API Buttres​s torque capabilities. Its validated performances make DWC/C the product of choice for production casing in the Shales and Drilling with Casing.

Every technical feature has been first proven in the ​lab and field history supports that DWC/C benefits have been successfully proven in the field.

 Applicable range

  • Available in sizes from

3 1/2" to 13 3/8"

  • Standard, alternative and special drifts
  • Carbon, Martensitic steel J- 55, K-55, L-80, P-110, Q125   
  • Yield strengths from 80 ksi to 125 ksi.


Suitable for onshore application, when performance required is the same as API buttress with the addition of rotational torque capabilities:

  • Production casing
  • Drilling with Casing.


  • Up to 100% compression resistance
  • API Buttress pressure resistance
  • API Buttress external pressure resistance
  • High bending resistance.


  • Simple, reliable and easy running
  • Suitable for automated rig handling systems
  • Clear and repeatable make-up charts
  • High torque capability for rotating the string during installation
  • Widely adopted by end-users as the best alternative to API Buttress connections.


  • Available with high torque option: DWC/​C- HT​, DWC/C- IS.
  • Optional Teflon® seal ring.



OCTG Product selection guide

DWC/C Video