Diamond Offshore declares special, regular dividends Thursday April 24, 8:12 am ET Diamond Offshore Drilling declares a special and a regular dividend, payable June 2 HOUSTON (AP) -- Diamond Offshore Drilling Inc. said Thursday its board declared a regular dividend of 13 cents and a special dividend of $1.25. Both dividends are payable June 2 to shareholders of record May 2, the petroleum drilling company said.