Subsea Wellhead

The NS Subsea Wellhead System consists of components at the surface of an oil or gas well that provides the structural and pressure-containing interface for the drilling and production equipment. The Wellhead System is designed to suspend casing and tubing loads independently, contain well pressures, maintain access into the annulus and wellbore and allows for full well control during drilling operations.


  • 5,000 PSI to 15,000 PSI
  • API Requirements ; 17D / 6A, PSL 3G
  • Guidance : Guidepost or Guideline less (funnel down)
  • Controls : Tree mounted SCM
  • Choke : Production / Injection Choke on Tree
  • Penetrations : Hydraulic and electrical for DHPT