UPDATE 2-Transocean to buy Norwegian rig firm Songa Offshore for $1.1 bln By: Reuters: Company News August 15, 2017 at 09:58 AM EDT * Acquisition adds $4.1 bln to Transocean's order book (Adds analyst, background) Read More >> Related Stocks: ENSCO Plc Schlumberger Ltd Seadrill 2021 Ltd Sterling Bancorp