DNO in the clear for drilling ops with Odfjell Drilling-managed rig
What happened
Norway’s regulator approved DNO to use the Deepsea Yantai semi‑submersible for drilling at Marulk. The rig is a harsh‑environment GM4D unit managed by Odfjell and working with multiple operators, making it operationally real for managed‑rig logistics and heavy support needs. Watch for any mobilization or HSE handover requirements when non‑owned rigs enter multi‑operator schedules
Buyer takeaway
Treat non‑owned managed rigs as supply chains: confirm who carries mobilisation, standby, and HSE responsibilities before awarding related scopes
Cost / money
Managed rig use can shift cost exposure into mobilisation and shore‑support pass‑throughs if contracts leave those items vague
Supplier / commercial
Rig managers with multi‑operator schedules can demand tighter cancellation and mobilisation terms; they may provide less flexibility on last‑minute changes
Safety / operations
HSE handover and fatigue management are critical when crews rotate under different commercial managers; Ops must verify handover plans
What to watch
Verify contractual clarity on who supplies shore‑support, medevac, and heavy‑lift crane services for non‑owned rigs
Key facts
- Semi‑submersible Deepsea Yantai (GM4D harsh environment)
- Operating on Norwegian Continental Shelf assignments
- Used by multiple operators for production drilling
Source excerpts
The 2019-built Deepsea Yantai GM4D harsh environment semi-submersible rig is owned by China’s CIMC and managed by Odfjell Drilling
The rig is working on the Norwegian Continental Shelf (NCS) on drilling assignments with DNO, Wellesley Petroleum, and Well Expertise. The 2019-built Deepsea Yantai GM4D harsh environment semi-submersible rig is owned by China’s CIMC and managed by Odfjell Drilling
Home Fossil Energy DNO in the clear for drilling ops with Odfjell Drilling-managed rig May 15, 2026, by Norway’s oil and gas player DNO has received the go-ahead from the country’s authorities for drilling activities in the Norwegian Sea with a semi-submersible rig managed by Odfjell Drilling, an offshore drilling contractor
