HAMILTON, BERMUDA--(Marketwire - Jan 17, 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.

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

This announcement is distributed by Thomson Reuters on behalf of Thomson Reuters clients. The owner of this announcement warrants that:

(i) the releases contained herein are protected by copyright and other applicable laws; and

(ii) they are solely responsible for the content, accuracy and originality of the information contained therein.

Source: Seadrill Limited via Thomson Reuters ONE

[HUG#1671073]