Isolation plug tool and method

Abstract

An isolation plug tool including a mandrel, an anchor assembly disposed on the mandrel, a seal assembly disposed on the mandrel having a seal, and a sleeve removably disposed radially outwardly of the seal.

What is claimed is: 
     
         1 . An isolation plug tool comprising:
 a mandrel;   an anchor assembly disposed on the mandrel;   a seal assembly disposed on the mandrel having a seal; and   a sleeve removably disposed radially outwardly of the seal.   
     
     
         2 . The isolation plug tool as claimed in  claim 1  wherein the anchor assembly includes a slip displaceable to a set position by a piston. 
     
     
         3 . The isolation plug tool as claimed in  claim 2  wherein the piston is displaceable by hydrostatic or applied hydraulic pressure. 
     
     
         4 . The isolation plug tool as claimed in  claim 1  wherein the tool further includes a trigger assembly. 
     
     
         5 . The isolation plug tool as claimed in  claim 4  wherein the trigger assembly is responsive to one or more of temperature, pressure, and time. 
     
     
         6 . The isolation plug tool as claimed in  claim 1  wherein the seal is a directional seal. 
     
     
         7 . The isolation plug tool as claimed in  claim 1  wherein seal is a plurality of seals. 
     
     
         8 . The isolation plug tool as claimed in  claim 7  wherein the plurality of seals are oppositely directional. 
     
     
         9 . The isolation plug tool as claimed in  claim 1  wherein the sleeve during running compresses a diameter of the seal. 
     
     
         10 . The isolation plug tool as claimed in  claim 1  wherein the sleeve includes an opening to alleviate differential pressure across the sleeve. 
     
     
         11 . A method for isolating one portion of a wellbore from an adjacent portion of the wellbore comprising:
 deploying a tool as claimed in  claim 1  into the wellbore;   anchoring the tool in the wellbore; and   removing the sleeve from the seal.   
     
     
         12 . The method as claimed in  claim 11  wherein the anchoring includes hydrostatically or hydraulically setting the anchoring assembly. 
     
     
         13 . The method as claimed in  claim 11  wherein the removing is by applying tensile force to the sleeve. 
     
     
         14 . The method as claimed in  claim 11  further comprising depositing cement on the tool. 
     
     
         15 . A wellbore comprising:
 a borehole in a formation;   a string in the wellbore; and   a tool as claimed in  claim 1  disposed in the string.   
     
     
         16 . The wellbore as claimed in  claim 15  further including cement disposed on the tool and extending uphole of the tool.