Fracturing tool and backup

Abstract

A tool including a cone having a single ramp surface. A backup disposed on the ramp surface; a pusher having one or more slips. The pusher in contact with the backup and configured to force the backup along the ramp surface during use of the tool. A method for fracturing a formation through which a borehole passes.

What is claimed is: 
     
         1 . A tool comprising:
 a cone having a single ramp surface;   a backup disposed on the ramp surface;   a pusher having one or more slips, the pusher in contact with the backup and configured to force the backup along the ramp surface during use of the tool.   
     
     
         2 . The tool as claimed in  claim 1  wherein the ramp surface is at angle of from about 2 degrees to about 20 degrees from a longitudinal axis of the cone. 
     
     
         3 . The tool as claimed in  claim 1  wherein the backup is configured to bridge annular and axial gaps when in use. 
     
     
         4 . The tool as claimed in  claim 1  wherein the backup comprises a tubular body including a helical cut line that terminates prior to reaching an end face of the body. 
     
     
         5 . The tool as claimed in  claim 4  wherein the body includes an uncut portion ranges from about 0.005 inch to about 1.00 inch. 
     
     
         6 . The tool as claimed in  claim 1  wherein the backup comprises a polymeric material. 
     
     
         7 . The tool as claimed in  claim 1  wherein the backup comprises a controlled electrolytic metallic material. 
     
     
         8 . The tool as claimed in  claim 1  wherein the backup comprises a metal material. 
     
     
         9 . The tool as claimed in  claim 1  further comprising a seal. 
     
     
         10 . The tool as claimed in  claim 9  wherein the seal has an outside diameter that is larger than an outside diameter of the backup and the pusher. 
     
     
         11 . The tool as claimed in  claim 10  wherein a difference in the diameter of the seal and the backup or pusher is from about 0.005 to about 0.500 inch. 
     
     
         12 . A backup comprising:
 a tubular body;   a helical cut line through the body that terminates prior to reaching an end face of the body.   
     
     
         13 . The backup as claimed in  claim 12  wherein the body includes an uncut portion that ranges from about 0.005 inch to about 1.00 inch. 
     
     
         14 . The tool as claimed in  claim 12  wherein the backup comprises a polymeric material. 
     
     
         15 . The tool as claimed in  claim 12  wherein the backup comprises a controlled electrolytic metallic material. 
     
     
         16 . The tool as claimed in  claim 12  wherein the backup comprises a metal material. 
     
     
         17 . A method for fracturing a formation through which a borehole passes comprising:
 applying an occluding member to a tool as claimed in  claim 1 , the tool having been installed in a borehole;   pressuring up on the borehole against the occluding member and tool;   fracturing the formation.   
     
     
         18 . The method as claimed in  claim 17  further comprising installing the tool as claimed in  claim 1  in the borehole 
     
     
         19 . The method as claimed in  claim 17  further comprising removing the tool from the borehole. 
     
     
         20 . The method as claimed in  claim 19  wherein the removing is by dissolving or disintegrating the tool.