Clusterware de-installation can be made in the case you want to rebuilt your entire cluster or simply convert your RAC database to a single instance database.
The procedure is straightforward and can be accomplished in a few minutes.
In the following example, we have 7 node cluster running. Each node has its own grid infrastructure home and oracle database home.
1- First Stop all databases and resources running on all nodes of the cluster.Read the complete article here: www.oracle-class.com