Method and apparatus for setting and reinforcing dropped fabric nested casing

Abstract

A system for deploying a fabric liner in a wellbore includes a free-to-fall sub and a shoe track. The free-to-fall sub includes a weighted compartment that is filled with a first fluid that increases the weight of the free-to-fall sub and at least one stabilizing wheel that centralizes the free-to-fall sub within the wellbore. The shoe track incudes a plurality of orifices that release a second fluid into the fabric liner. The fabric liner retains the second fluid between the shoe track and the fabric liner. The free-to-fall sub is rigidly fixed to a downhole end of the fabric liner such that the fabric liner supports the free-to-fall sub within the wellbore.

What is claimed is: 
     
         1 . A system for deploying a fabric liner in a wellbore, the system comprising:
 a free-to-fall sub, the free-to-fall sub comprising:
 a weighted compartment that is filled with a first fluid that increases a weight of the free-to-fall sub; and 
 at least one stabilizing wheel configured to centralize the free-to-fall sub within the wellbore; and 
   a modified shoe track comprising a plurality of orifices configured to release a second fluid into the fabric liner;   wherein the fabric liner is configured to retain the second fluid in an annular space between a casing string and the wellbore such that the second fluid is prevented from being lost in subterranean formations; and   wherein the free-to-fall sub is rigidly fixed to a downhole end of the fabric liner.   
     
     
         2 . The system as claimed in  claim 1 , wherein the at least one stabilizing wheel is disposed on an outer surface of the free-to-fall sub. 
     
     
         3 . The system as claimed in  claim 1 , wherein the fabric liner is configured to receive the casing string and the modified shoe track when the fabric liner is deployed in the wellbore. 
     
     
         4 . The system as claimed in  claim 1 , further comprising: a first plug configured to seal the downhole end of the modified shoe track. 
     
     
         5 . The system as claimed in  claim 1 , wherein the free-to-fall sub comprises a fluid port that fluidly connects the modified shoe track and the fabric liner to the free-to-fall sub. 
     
     
         6 . The system as claimed in  claim 5 , further comprising: a second plug configured to seal a surface end of the modified shoe track. 
     
     
         7 . The system as claimed in  claim 1 , further comprising a plurality of rupture discs that are configured to break due to applied differential pressure through the second fluid. 
     
     
         8 . The system as claimed in  claim 7 , wherein the plurality of rupture discs are disposed around an outer periphery of the modified shoe track. 
     
     
         9 . The system as claimed in  claim 7 , wherein the modified shoe track comprises a plurality of check valves that are configured to prevent the second fluid from re-entering the casing string. 
     
     
         10 . The system as claimed in  claim 1 , wherein the modified shoe track comprises an opening sleeve configured to prevent the second fluid from exiting the free-to-fall sub. 
     
     
         11 . The system as claimed in  claim 1 , wherein the modified shoe track comprises a closing sleeve configured to prevent the second fluid from re-entering the modified shoe track. 
     
     
         12 . The system as claimed in  claim 1 , further comprising: a roller disposed at a surface end of the wellbore configured to unroll the fabric liner when the free-to-fall sub is being deployed in the wellbore. 
     
     
         13 . The system as claimed in  claim 1 , further comprising: a fabric hanger configured to retain the fabric liner at a surface end of the wellbore. 
     
     
         14 . A method of deploying a fabric liner in a wellbore, the method comprising:
 fixing a free-to-fall sub to a downhole end of the fabric liner, the free-to-fall sub comprising:
 a weighted compartment that is filled with a first fluid that increases a weight of the free-to-fall sub; and 
 at least one stabilizing wheel configured to centralize the free-to-fall sub within the wellbore; 
   fixing the fabric liner to a surface end of the wellbore;   deploying the free-to-fall sub within the wellbore until the free-to-fall sub reaches a bottom surface of the wellbore;   running, in-hole, a casing string and a modified shoe track into the fabric liner, the modified shoe track comprising a plurality of orifices configured to release a second fluid into the fabric liner; and   retaining, by the fabric liner, the second fluid between the casing string and the wellbore.   
     
     
         15 . The method of  claim 14 , further comprising: sealing, by a first plug, a downhole end of the modified shoe track such that pressure develops within the modified shoe track. 
     
     
         16 . The method of  claim 14 , further comprising: sealing, by a second plug, a surface end of the modified shoe track once the fabric liner has been filled with fluid. 
     
     
         17 . The method of  claim 14 , wherein deploying the free-to-fall sub within the wellbore further comprises unrolling the fabric liner from a roller disposed at the surface end of the wellbore. 
     
     
         18 . The method of  claim 17 , further comprising: detaching the fabric liner from the roller once the free-to-fall sub is deployed within the wellbore. 
     
     
         19 . The method of  claim 14 , wherein running the casing string and the modified shoe track in hole comprises inserting the casing string and the modified shoe track into the fabric liner such that the fabric liner is configured to receive the casing string and the modified shoe track when the fabric liner is deployed in the wellbore. 
     
     
         20 . The method of  claim 14 , further comprising drilling through the free-to-fall sub and the modified shoe track once the second fluid has hardened.