Canada’s Ensign Resource Service Group Inc. said its wholly-owned subsidiary, Ensign (Australia) Holdings Pty Limited has taken over Australian Oil & Gas Corporation Limited after acquiring more than of 50% of AOG shares on a fully diluted basis. Under Ensign’s offers, AOG’s shareholders will realise A$2.70 cash (US$1=A$1.77) for each AOG share and AU$1.50 cash…