US independent Kosmos Energy and London-based Trident Energy have joined forces to acquire Hess’ stakes in the producing Ceiba, Oveng and Okume fields off Equatorial Guinea for $650 million, while at the same time securing three adjacent exploration licenses.

The announcement of the deal came just one day before Hess also revealed that it was selling its Norwegian subsidiary — a partner in the North Sea Valhall and Hod fields — to Aker BP for $2 billion.