OEM partitions are created by computer suppliers, which include some manufacturers' software or one-click factory restore settings. It takes up a lot of disk space and is not very useful. So the answer is Yes, it is safe for you to delete Healthy (OEM Partition)s without causing any PC issue.

Can we delete recovery partition?

As to the question "can I delete recovery partition", the answer is absolutely positive. You can delete a recovery partition without affecting the running OS. ... For average users, it is better to keep the recovery partition as it is in the hard drive, as such a partition won't take up too much space.

Can I delete the Lenovo partition?

The partitions contain critical information that allows the Lenovo computer to operate. ... However, the recovery partition can be removed under certain conditions to obtain more hard drive space. Creating backups and then choosing to remove the partitioned space is now an option in Windows 8.