Is there any inventory log created, have you checked for any faults in it?
Oracle_common directory does not get created with the standalone weblogic installation.
It comes only with any of the Fusion middleware product installations (For example SOA, Forms, IDM, ..etc)
ADF is not installed via Opatch. It is installled via the OUI.
Only one off patches are installed via opatch.
sorry, i forgot to install adf before trying the patches.