BP Friday became the second big oil company to order new LNG tankers. BP said it has placed an order worth in excess of $300 million with South Korea's Samsung Heavy Industries Co. for two tankers�and options to buy a further three vessels. Shell International Gas Ltd. earlier reported it ordered two LNG carriers from the Mitsubishi Heavy Industries shipyard in Japan. Tankers of both companies will be used to supply the Cove Point terminal in Maryland where both have secured capacity.