Recover hard disk data after deleting partitions

Use ralford's suggestion together with TestDisk :

TestDisk is a powerful free data recovery software! It was primarily designed to help recover lost partitions and/or make non-booting disks bootable again when these symptoms are caused by faulty software, certain types of viruses or human error (such as accidentally deleting a Partition Table). Partition table recovery using TestDisk is really easy.

Partition Find and Mount should be able to recover your partitions.