If you are using rug for the update process all new updates are locally stored in /var/cached/rug/packages. If you copy those files to another OES-System to a folder for example /tmp/packages and then iterate over all rpms with

for files in * do; rpm -Uvh --force --nodeps "$files" ;done

will this cause problems because of broken dependencies during install?

The reason for this procedure is that I have some OES-Server which are running in an isolated environment and have no access to other OES-Server or the internet.