Seadrill has announced that Sonadrill Holding, its 50:50 joint venture with an affiliate of Sonangol E.P., has been awarded a contract extension.A seven-well priced option for the ultra-deepwater drillship Sonangol Quenguela has been exercised…<p><p>https://www.marinelink.com/news/seadrill-awarded-contract-extension-537030</p></p>