Setting method for coiled tubing run, through tubing bridge plug

Abstract

A through tubing downhole tool, such as a bridge plug is delivered on coiled tubing. The setting process entails an initial pressurization to anchor the tool and compress its sealing element. The remainder of the needed force for setting the tool can come from an upward pull on the coiled tubing. Should more force than can be delivered from a pull on the coiled tubing be required to finish the setting and releasing process from the downhole tool, a jar or impact tool can be incorporated to boost the applied uphole force that is delivered from the pull on the coiled tubing at the surface. Alternatively, a pressure amplifier can be fitted to the coiled tubing so that a smaller pressure applied to the coiled tubing at the surface can deliver the required force to set and release from the downhole tool.

1 . A method of actuating a tool delivered on delivery tubing, comprising: 
 connecting the tool to the delivery tubing;    delivering the tool on said delivery tubing    initiating actuation of said tool with applied pressure in said delivery tubing:    completing the actuation of said tool with an applied force.    
   
   
       2 . The method of  claim 1 , comprising: 
 using coiled tubing for said delivery tubing;    delivering said tool on said coiled tubing through existing well tubing into a portion of the well having a larger diameter than said well tubing;    providing said applied force by movement of said delivery tubing.    
   
   
       3 . The method of  claim 2 , comprising: 
 providing a force enhancing device on said delivery tubing.    
   
   
       4 . The method of  claim 3 , comprising: 
 using a jar tool for said force enhancing.    
   
   
       5 . The method of  claim 4 , comprising: 
 using a high expansion packer or bridge plug for said tool.    
   
   
       6 . The method of  claim 2 , comprising: 
 using a high expansion packer or bridge plug for said tool.    
   
   
       7 . The method of  claim 6 , comprising: 
 setting an anchor on said packer or bridge plug with said applied pressure in said delivery tubing.    
   
   
       8 . The method of  claim 7 , comprising: 
 increasing the diameter of a sealing element of said packer or bridge plug with said applied pressure in said delivery tubing.    
   
   
       9 . The method of  claim 8 , comprising: 
 completing movement of an actuating rod and releasing from the packer or bridge plug with said applied force.    
   
   
       10 . The method of  claim 9 , comprising: 
 enhancing said applied force with a tool mounted to said delivery tubing.    
   
   
       11 . The method of  claim 10 , comprising: 
 using a jar tool to enhance said applied force.    
   
   
       12 . The method of  claim 1 , comprising: 
 using coiled tubing for said delivery tubing;    delivering said tool on said coiled tubing through existing well tubing into a portion of the well having a larger diameter than said well tubing;    using fluid pressure to complete the actuation of said tool.    
   
   
       13 . The method of  claim 12 , comprising: 
 providing a fluid pressure multiplier in said delivery tubing to limit applied pressure near the surface in said delivery tubing while having sufficient pressure at said tool to fully actuate it.    
   
   
       14 . The method of  claim 13 , comprising: 
 using a high expansion packer or bridge plug for said tool.    
   
   
       15 . The method of  claim 14 , comprising: 
 setting an anchor on said packer or bridge plug with said applied pressure in said delivery tubing.    
   
   
       16 . The method of  claim 15 , comprising: 
 increasing the diameter of a sealing element of said packer or bridge plug with said applied pressure in said delivery tubing.    
   
   
       17 . The method of  claim 16 , comprising: 
 completing movement of an actuating rod and releasing from the packer or bridge plug with said applied pressure.