Danish oil and shipping group AP Moller-Maersk said Friday its drilling unit, Maersk Drilling, had signed a two-year rig contract worth around $100 million in Cameroon. The group said in a statement the contract was for the jack-up rig Maersk Endurer and had been signed with China Petroleum & Chemical Corp (Sinopec). The expected commencement is late October 2012, Maersk Drilling said in the statement.