NEW ORLEANS - Charles Monroe Beard of Jennings, in a federal court suit filed here last Friday, claimed he worked 8,641 hours overtime for the Continental Oil company of Delaware, defendant, in Louisiana fields and asked $11,892.70 compensation from the company under the fair labor standards act of 1938. A similar sum was sought for alleged "liquidation damages." Beard's suit claimed the alleged overtime was accumulated between Sept. 1, 1937, and Oct. 3, 1941, when he said he was "discharged without just cause."