| CPC E21B 17/042 (2013.01) [E21B 43/088 (2013.01); E21B 47/09 (2013.01)] | 4 Claims | 

| 
               1. A ring for a downhole tool comprising: 
            a ring body; 
                a weld groove formed in a circumferential direction in an outside surface of the ring prior to being disposed upon the tool. 
               |