Device for treating a bottom-hole formation wellbore

Abstract

A device for treating a bottom-hole formation of a wellbore comprises a firing head and seal block assembly at a proximal end thereof and a bullnose assembly at a distal end thereof. A carrier tube extends between the firing head and seal block assembly and the bullnose assembly. The carrier tube contains a combustible chemical composition which generates hydrochloric acid gas or hydrofluoric acid gas or a combination thereof when combusted. A dispersion tube extends from the carrier tube. The dispersion tube has a lateral opening. The lateral opening may be a slot or an aperture. There is a charge wire electrically connecting the firing head and sealing block assembly to the combustible chemical composition.

What is claimed is: 
     
         1 . A device for treating a bottom-hole formation of a wellbore, the device comprising:
 a firing head and seal block assembly at a proximal end thereof;   a bullnose assembly at a distal end thereof;   a carrier tube extending from the firing head and seal block assembly the carrier tube containing a combustible chemical composition which generates hydrochloric acid gas or hydrofluoric acid gas or a combination thereof when combusted;   a dispersion tube extending from the carrier tube, the dispersion tube having a lateral opening; and   a charge wire electrically coupling the firing head and sealing block assembly to the combustible chemical composition.   
     
     
         2 . The device as claimed in  claim 1  wherein the lateral opening in the dispersion tube is a slot. 
     
     
         3 . The device as claimed in  claim 1  wherein the lateral opening in the dispersion tube is an aperture. 
     
     
         4 . The device as claimed in any one of  claims 1  to  3  wherein the combustible chemical composition comprises between 30% and 60% by weight hexachloroethane and between 40% and 70% by weight ammonium nitrate. 
     
     
         5 . The device as claimed in any one of  claims 1  to  3  wherein the combustible chemical composition comprises between 30% and 60% by weight polyvinyl chloride and between 40% and 70% by weight ammonium nitrate. 
     
     
         6 . The device as claimed in any one of  claims 1  to  3  wherein the combustible chemical composition comprises between 0% and 5% by weight polyvinyl chloride, between 25% and 55% by weight hexachloroethane, and between 40% and 70% by weight ammonium nitrate. The device as claimed in any one of  claims 1  to  3  wherein the combustible chemical composition comprises between 5% and 25% by weight polytetrafluoroethylene, between 25% and 55% by weight hexachloroethane, and between 40% and 70% by weight ammonium nitrate. 
     
     
         8 . The device as claimed in any one of  claims 1  to  3  wherein the combustible chemical composition further comprises between 2% and 12% by weight potassium dichromate. 
     
     
         9 . The device as claimed in any one of  claims 1  to  3  wherein the combustible chemical composition includes a plurality of puck shaped members. 
     
     
         10 . The device as claimed in  claim 9  wherein the combustible chemical composition further includes an adhesive binding adjacent ones of the puck shaped members. 
     
     
         11 . The device as claimed in  claim 9  wherein the combustible chemical composition further includes a combustion catalyst.