Well stimulation fluid and well stimulation fluid recycling process

Abstract

A glycol-based well stimulation fluid and a process for recycling a glycol-based well stimulation fluid, comprising the steps of filtration and heating.

I claim:  
     
         1 . A well stimulation fluid comprising a glycol, said a glycol representing between 51 and 100% of said fluid, by weight.  
     
     
         2 . A well stimulation fluid as claimed in  claim 1 , in the form of a foam including a liquefied gas selected from the group consisting of N 2 , CO 2 , and air.  
     
     
         3 . A well stimulation fluid as claimed in  claim 1 , further comprising a solvent selected from the group consisting of water, methanol, and toluene.  
     
     
         4 . A well stimulation as claimed in  claim 1 , wherein said glycol is ethylene glycol.  
     
     
         5 . A kill fluid comprising glycol.  
     
     
         6 . A workover fluid comprising glycol.  
     
     
         7 . A fluid for transporting solids, comprising glycol.  
     
     
         8 . A method for recycling a well stimulation fluid comprising a glycol, said method comprising the steps of: 
 a) filtering said fluid; and    b) heating said fluid to vaporize materials having a lower boiling point than said fluid.    
     
     
         9 . A method as claimed in  claim 8 , wherein said glycol is ethylene glycol.