LONDON: Sintana Energy Inc. (TSXV: SEI) (OTCQX: SNNAF) and Challenger Energy Group PLC (AIM: CEG) announced Wednesday they have reached an agreement on a recommended all-share offer by which Sintana will acquire the entire issued share capital of Challenger. The acquisition, valued at approximately £45 million (C$84 million), will be effected through a Court-sanctioned…