The CJ70 is specifically designed for all-year use in water depths up to 150 meters on the Norwegian Continental Shelf in the North Sea, taking into account all Norwegian regulatory requirements regarding safety and working environment. It provides competition in an area previously dominated by floaters but does that with much better uptime during the harsh winter months and with significantly less motion of the drill string due to the fixed nature of a jack-up. The innovative X-Y skidding system provides a large drilling envelope of 110x66ft.
The CJ series further consists of the CJ43, CJ46, CJ50, CJ54, CJ62, and CJ80.
Currently, the world's largest operating jack up oil rigs are the CJ70 series and are as follow:
- Askepott
- Askeladden
- Noble Invincible
- Shelf Drilling Barsk
- Noble Integrator
- Noble Interceptor
- West Linus
- Noble Intrepid
- West Elara
- Noble Inspirer
- Noble Innovator