Database service name

This question is in regard to oracle 12c server setup. During the server setup process there is a session that allows you to set up an oracle repository thru an interface called repository creation utility. During the process it asks for the database service name to be inserted in the service name field. This service name is later used by the form/report application to access the database.

Here is my question: We are changing the service name from one

name to one other (for example SID.word to SID.Com where SID is the database

name). Is there a way to change the service name without reinstalling weblogic