Methods and systems for a sealing a wellbore

Abstract

A resettable bridge plug that is configured to isolate a section of a wellbore. The resettable bridge may be utilized in fracturing a wellbore, wherein the same bridge plug may be set and released at different locations for multiple cycles with a wireline run.

1 . A downhole tool comprising:
 a fill chamber being configured to receive fluid, the fill chamber having a dynamic first pressure that varies based on an amount of fluid within the fill chamber;   an inlet configured to supply the fluid to the fill chamber;   an outlet configured to release the fluid from the fill chamber into an annulus;   a piston configured to move within the downhole tool based on the dynamic first pressure.   
     
     
         2 . The downhole tool of  claim 1 , further comprising:
 a valve configured to open and close a proximal end of a pathway, wherein a distal end of the pathway is coupled to the inlet.   
     
     
         3 . The downhole tool of  claim 2 , further comprising:
 a filter configured to filter elements entering the valve from an annulus positioned outside of the downhole tool.   
     
     
         4 . The downhole tool of  claim 2 , wherein the valve is configured to be mechanically opened. 
     
     
         5 . The downhole tool of  claim 1 , further comprising:
 force chamber with a dynamic second pressure, wherein the piston is configured to move based on a pressure differential between the dynamic first pressure and the dynamic second pressure.   
     
     
         6 . The downhole tool of  claim 5 , wherein the piston is configured to move into the force chamber decreasing a volume associated with the force chamber responsive to the dynamic first pressure being greater than the dynamic second pressure. 
     
     
         7 . The downhole tool of  claim 6 , wherein the dynamic first pressure applies a first force on the piston in a first direction towards a proximal end of the downhole tool, and the dynamic second pressure applies a second force on the piston in a second direction towards a distal end of the downhole tool. 
     
     
         8 . The downhole tool of  claim 6 , further comprising:
 a packer configured to seal across an annulus responsive to the piston moving in the first direction.   
     
     
         9 . The downhole tool of  claim 6 , further comprising:
 a load release device configured to apply a third force against the piston, the third force being in the first direction.   
     
     
         10 . The downhole tool of  claim 1 , wherein the fluid received by the fill chamber is hydrostatic fluid, and the downhole tool is a bridge plug. 
     
     
         11 . A method associated with a downhole tool comprising:
 supplying fluid to an inlet of a fill chamber;   increasing a dynamic first pressure associated with the fill chamber responsive to increasing an amount of fluid within the fill chamber;   releasing fluid from the fill chamber via an outlet;   decreasing the dynamic first pressure associated with the fill chamber responsive to decreasing the amount of fluid within the fill chamber;   moving a piston within the downhole tool based on the dynamic first pressure.   
     
     
         12 . The method of  claim 11 , further comprising:
 opening a valve on a proximal end of a pathway to supply the fluid to the inlet of the fill chamber;   closing the valve on the proximal end of the pathway to no longer supply the fluid to the inlet of the fill chamber, wherein a distal end of the pathway is coupled to the inlet.   
     
     
         13 . The method of  claim 12 , further comprising:
 filtering elements entering the valve from an annulus positioned outside of the downhole tool.   
     
     
         14 . The method of  claim 12  further comprising:
 mechanically opening the valve. 
 
     
     
         15 . The method of  claim 11 , further comprising:
 moving the piston is based on a pressure differential between the dynamic first pressure and a dynamic second pressure, the dynamic second pressure being associated with a force chamber.   
     
     
         16 . The method of  claim 15 , further comprising:
 moving the piston into the force chamber responsive to the dynamic first pressure being greater than the dynamic second pressure;   decreasing a volume associated with the force chamber responsive to the dynamic first pressure being greater than the dynamic second pressure.   
     
     
         17 . The method of  claim 16 , further comprising:
 applying via the dynamic first pressure a first force on the piston in a first direction towards a proximal end of the downhole tool, and   applying via the dynamic second pressure a second force on the piston in a second direction towards a distal end of the downhole tool.   
     
     
         18 . The method of  claim 16 , further comprising:
 sealing via a packer across an annulus responsive to the piston moving in the first direction.   
     
     
         19 . The method of  claim 16 , further comprising:
 applying via a load release device a third force against the piston, the third force being in the first direction.   
     
     
         20 . The method of  claim 11 , wherein the fluid received by the fill chamber is hydrostatic fluid, and the downhole tool is a bridge plug.