Elastomeric admixtures for improving cement elasticity

Abstract

A method and cementing composition is provided for sealing a subterranean zone penetrated by a well bore, wherein the cementing composition comprises a mixture of cementitious material, acrylonitrile butadiene styrene (ABS), and sufficient water to form a slurry.

1 . A method of sealing a subterranean zone penetrated by a well bore comprising: 
 preparing a cementing composition comprising cement, acrylonitrile butadiene styrene polymer, and water;    placing the cementing composition into the subterranean zone; and    allowing the cementing composition to set therein.    
     
     
         2 . The method of  claim 1  wherein the cementing composition further comprises silica flour.  
     
     
         3 . The method of  claim 1  wherein the cement is Portland cement, pozzolan cement, gypsum cement, aluminous cement, silica cement, or alkaline cement.  
     
     
         4 . The method of  claim 1  wherein the acrylonitrile butadiene styrene polymer is made with a 70% polybutadiene substrate.  
     
     
         5 . The method of  claim 1  wherein the acrylonitrile butadiene styrene polymer is made with a 65% styrene-butadiene rubber substrate.  
     
     
         6 . The method of  claim 1  wherein the acrylonitrile butadiene styrene polymer is made with a 35% styrene-butadiene rubber substrate.  
     
     
         7 . The method of  claim 1  wherein the acrylonitrile butadiene styrene polymer is present in a range of 5% to 30% by weight of the cement.  
     
     
         8 . The method of  claim 1  wherein the water is present in a range of 38% to 70% by weight of the cement.  
     
     
         9 . A cementing composition for sealing a subterranean zone penetrated by a well bore comprising: 
 cement, acrylonitrile butadiene styrene polymer, and water.    
     
     
         10 . The composition of  claim 9  further comprising silica flour.  
     
     
         11 . The composition of  claim 9  wherein the cement is Portland cement, pozzolan cement, gypsum cement, aluminous cement, silica cement, or alkaline cement.  
     
     
         12 . The composition of  claim 9  wherein the acrylonitrile butadiene styrene polymer is made with a 70% polybutadiene substrate.  
     
     
         13 . The composition of  claim 9  wherein the acrylonitrile butadiene styrene polymer is made with a 65% styrene-butadiene rubber substrate.  
     
     
         14 . The composition of  claim 9  wherein the acrylonitrile butadiene styrene polymer is made with a 35% styrene-butadiene rubber substrate.  
     
     
         15 . The composition of  claim 9  wherein the acrylonitrile butadiene styrene polymer is present in a range of 5% to 30% by weight of the cement.  
     
     
         16 . The composition of  claim 9  wherein the water is present in a range of 38% to 70% by weight of the cement.  
     
     
         17 . A method of sealing a subterranean zone penetrated by a well bore comprising: 
 preparing a cementing composition comprising cement, acrylonitrile butadiene styrene polymer, and water, wherein the acrylonitrile butadiene styrene polymer is present in a range of 5% to 30% by weight of the cement;    placing the cementing composition into the subterranean zone; and    allowing the cementing composition to set therein.    
     
     
         18 . The method of  claim 17  wherein the cement is Portland cement, pozzolan cement, gypsum cement, aluminous cement, silica cement, or alkaline cement.  
     
     
         19 . The method of  claim 17  wherein the acrylonitrile butadiene styrene polymer is made with a 70% polybutadiene substrate.  
     
     
         20 . The method of  claim 17  wherein the acrylonitrile butadiene styrene polymer is made with a 65% styrene-butadiene rubber substrate.  
     
     
         21 . The method of  claim 17  wherein the acrylonitrile butadiene styrene polymer is made with a 35% styrene-butadiene rubber substrate.  
     
     
         22 . The method of  claim 17  wherein the water is present in a range of 38% to 70% by weight of the cement.  
     
     
         23 . The method of  claim 17  wherein the cementing composition further comprises silica flour.