BP has extended a maintenance and modification contract with Aker Solutions for the Ula, Valhall, Hod and Tambar fields in the Norwegian region of the North Sea.

With the extension, BP has exercised a one-year option on the existing agreement signed in 2005, under which work will last through to April 2012.

Work on the fields will include engineering, procurement, fabrication, installation and maintenance support.

The contract also includes hook-up and completion of the new PH platform at Valhall and tie-in of Oselvar to the Ula field.