Intervals

Is there a way to convert in interval into hours? I have a table that
records the amount of time worked by a person and want to sum up all the
hours, however with the column being an interval once you reach more
than 24 hours it turns that into a day. This is not what I want so
instead of outputting 1day 2:00:00 I would want to output 26:00:00 is
this possible?

Thanks

Jake