If i understand your question correctly, you have done some modifications to the invoice form (by adding some fields) then you changed the invoice layout using openOffice, if this is the case keep reading.. :)

To deliver the view modifications to another database, you should create a separate module containing all these modifications & install it to the other database.

To learn more about how to create new modules take a look at: Example of module creation

I created a database on openerp, I changed the menu "invoice" by add some fields, and with openoffice, I changed the format of the invoice,

Now I want to delivered my work to another database.

If you want to have the same changes in one than more databases it is Best Practice to create a separate module. If you have a Dev-, Test- and productive environment this would be the best method.

If you want to have a quick solution then you have to perform the same changes manually also in the second database. For the report you can just past&copy the content within openoffice.

Update:

• Regarding how to create a module, please see the Developer Documentation.
• Also this question could be useful.