Hamilton, Bermuda, January 16, 2013 - Tullow plc has exercised its contractual option to extend the contract for the ultra-deepwater semi-submersible rig West Leo by two years from  May 2016 to May 2018. The West Leo is expected to carry out operations in West Africa until the end of its contract in May 2018.

The potential contract revenue for the extension is estimated to approximately US$450 million based on 97 percent utilization and includes a performance bonus arrangement. This brings the total estimated contract value to US$1.13 billion.

In line with the omnibus agreement terms and conditions between Seadrill and Seadrill Partners, Seadrill is obligated to offer the West Leo to Seadrill Partners at a fair market price.

Media contact
Rune Magnus Lundetræ
Chief Financial Officer
Seadrill Management AS
+47 51 30 91 26     

Analyst contact
Ragnvald Kavli
Investor Relations Manager
Seadrill Management AS
+47 51 30 91 26    

This information is subject of the disclosure requirements pursuant to section 5-12 of the Norwegian Securities Trading Act.