Pumpable seat assembly and use for well completion

Abstract

An assembly and process for fracturing, stimulating and producing a wellbore having a plurality of oil or gas producing zones is provided comprising introducing into the well the pumpable seat assembly comprising a generally cylindrical tube having an outer diameter and an inner diameter with an upper end forming a ball seat; setting the pumpable seat assembly below an oil or gas producing zone to be produced; introducing a dissolvable ball into the well, said dissolvable ball having a sufficiently large enough outer circumference so that it can sit on the ball seat and temporarily restrict a flow of fluids to the portion of the wellbore located below the pumpable seat assembly; and fracturing the oil and gas producing zone to stimulate oil or gas production; whereby the biodegradable ball is configured to dissolve within a predetermined period of time so that when it dissolves any oil or gas produced from zones below the pumpable seat assembly can flow through the cylindrical tube.

What is claimed is: 
     
         1 . A process for fracturing, stimulating and producing a wellbore having a plurality of oil or gas producing zones, comprising:
 introducing into the well a pumpable seat assembly comprising a generally cylindrical tube having an outer diameter and an inner diameter with an upper end forming a ball seat;   setting the pumpable seat assembly below an oil or gas producing zone to be produced;   introducing a dissolvable ball into the well, said dissolvable ball having a sufficiently large enough outer circumference so that it can sit on the ball seat and temporarily restrict a flow of fluids to the portion of the wellbore located below the pumpable seat assembly; and   fracturing the oil and gas producing zone to stimulate oil or gas production;   whereby the biodegradable ball is configured to dissolve within a predetermined period of time so that when it dissolves any oil or gas produced from zones below the pumpable seat assembly can flow through the cylindrical tube.   
     
     
         2 . The process as claimed in  claim 1 , wherein the inner diameter of the generally cylindrical tube is about 1 inch. 
     
     
         3 . The process as claimed in  claim 1 , wherein the inner diameter of the generally cylindrical tube is about 2 inches or greater. 
     
     
         4 . The process as claimed in  claim 1 , wherein the inner diameter is sufficiently large so that oil or gas can freely flow therethrough. 
     
     
         5 . The assembly as claimed in  claim 1 , wherein the inner diameter of the generally cylindrical tube is between about 1 inch and 2 inches. 
     
     
         6 . The process as claimed in  claim 1 , further comprising pumping a second pumpable seat assembly comprising a generally cylindrical tube having an outer diameter and an inner diameter with an upper end forming a ball seat, setting the second pumpable seat assembly below a second oil or gas producing zone to be produced, and introducing a second dissolvable ball into the well to restrict the flow from the previously formed oil and gas producing zone. 
     
     
         7 . A pumpable seat assembly for temporarily sealing a well casing, comprising:
 a generally cylindrical tube having an outer diameter and an inner diameter with an upper end forming a ball seat;   a upper slip assembly and a lower slip assembly mounted on such cylindrical tube and adapted to selectively engage the well casing to anchor the pumpable seat assembly;   an elastomeric packing element mounted on said cylindrical tube between the upper slip assembly and the lower slip assembly; and   a dissolvable ball having a sufficiently large enough outer circumference so that it can sit on the ball seat and temporarily restrict a flow of fluids to the portion of the wellbore located below the pumpable seat assembly.   
     
     
         8 . The assembly as claimed in  claim 7 , wherein the inner diameter of the generally cylindrical tube is about 1 inch. 
     
     
         9 . The assembly as claimed in  claim 7 , wherein the inner diameter of the generally cylindrical tube is about 2 inches or greater. 
     
     
         10 . The assembly as claimed in  claim 7 , wherein the inner diameter of the generally cylindrical tube is between about 1 inch and two inches. 
     
     
         11 . The process as claimed in  claim 7 , wherein the inner diameter is sufficiently large so that oil or gas can freely flow therethrough.