Papua New Guinea-based Oil Search Limited has signed a memorandum of understanding (MOU) with Halliburton (NYSE: HAL) to develop a strategic alliance Ð a unique arrangement between an independent operator and a major oil and gas contractor. Halliburton subsidiaries Halliburton Overseas Ltd, Kellogg Brown & Root Pty Ltd (KBR) and Halliburton Australia Pty Ltd will…