Oracle R Enterprise client components are installed in a directory that you create. In this example, the directory is called myoreclient. Subdirectories that contain the Oracle R Enterprise client components are:
client -- contains the Oracle R Enterprise client packages
instantclient_12_ -- contains Oracle Instant Client for Oracle Database 12.1
supporting -- contains the Oracle R Enterprise client supporting packages
The directories were extracted from these zip files which are also in the the client installation directory myoreclient:
instantclient-basic-windows.x64-12.1.0.1.zip
instantclient-sdk-windows.x64-12.1.0.1.zip
ore-client-win-x86.64-1.3.1.zip
ore-supporting-win-x86_64-1.3.1.zip