Audiophul is correct. SDRL announces their distribution with their quarterly earnings report about eight weeks after the end of the quarter. The payment is then made about two weeks after the earnings report. The first quarter earnings announcement will be made at the end of May and you will receive the payment in mid June. What SDRL did last year was to accelerate the payment for the 4th quarter from mid March to the end of December.
I don't think there will be any special dividend because the earnings will be relatively weak in the 1st and 2nd quarters and then increasing significantly in the 2nd half when several newbuilds arrive.