Methods for supplying a chemical within a subterranean formation

Abstract

The method comprises deploying through a well a substantially longitudinal body comprising at least in part a degradable material able to release a chemical; positioning the longitudinal body at a downhole location from the well; and allowing the degradable material to degrade and the chemical to be released.

1 . A method comprising:
 (a) deploying through a well a substantially longitudinal body comprising at least in part a degradable material able to release a chemical;   (b) positioning the longitudinal body at a downhole location from the well; and   (c) allowing the degradable material to degrade and the chemical to be released.   
     
     
         2 . The method of  claim 1 , wherein the longitudinal body is positioned on a tool selected from the group consisting of slickline, wireline, coil-tubing, micro-coil tubing, drill string, and combination thereof. 
     
     
         3 . The method of  claim 1 , wherein the degradable material is degraded at the downhole location with addition of a release fluid, which is naturally present at downhole location or injected. 
     
     
         4 . The method of  claim 3 , wherein the degradable material is degraded at the downhole location with a trigger. 
     
     
         5 . The method of  claim 5 , wherein the trigger is selected from the group consisting of: temperature, mechanical wave including acoustic wave, and electromagnetic wave (microwave, UV). 
     
     
         6 . The method of  claim 1 , wherein the longitudinal body further comprises at least in part a second degradable material able to release a second chemical. 
     
     
         7 . The method of  claim 6 , wherein the chemical or the second chemical is selected from the group consisting of: polymer cross-linker, a breaker, an acid or an acid precursor, a polyacrylamide and mixtures thereof. 
     
     
         8 . The method of  claim 6 , wherein the degradable material or the second degradable material is selected from the group consisting of: lactide, glycolide, polylactic acid, polyglycolic acid, copolymers of polylactic acid and polyglycolic acid, copolymers of glycolic acid with other hydroxy-, carboxylic acid-, or hydroxycarboxylic acid-containing moieties, copolymers of lactic acid with other hydroxy-, carboxylic acid-, or hydroxycarboxylic acid-containing moieties, and mixtures thereof. 
     
     
         9 . A method comprising:
 (a) deploying with a slickline through a well a substantially longitudinal cylindrical body attached to the slickline, wherein the longitudinal body comprises at least in part a degradable material able to release a chemical;   (b) positioning with the slickline the longitudinal body at a downhole location from the well; and   (c) allowing the degradable material to degrade and the chemical to be released.   
     
     
         10 . The method of  claim 9 , wherein the degradable material is degraded at the downhole location with addition of a release fluid, which is naturally present at downhole location or injected. 
     
     
         11 . The method of  claim 9 , wherein the degradable material is degraded at the downhole location with a trigger. 
     
     
         12 . The method of  claim 11 , wherein the trigger is selected from the group consisting of: temperature, mechanical wave including acoustic wave, and electromagnetic wave (microwave, UV). 
     
     
         13 . The method of  claim 9 , wherein the longitudinal body further comprises at least in part a second degradable material able to release a second chemical. 
     
     
         14 . The method of  claim 13 , wherein the chemical or the second chemical is selected from the group consisting of: polymer cross-linker, a breaker, an acid or an acid precursor, a polyacrylamide and mixtures thereof. 
     
     
         15 . The method of  claim 13 , wherein the degradable material or the second degradable material is selected from the group consisting of: lactide, glycolide, polylactic acid, polyglycolic acid, copolymers of polylactic acid and polyglycolic acid, copolymers of glycolic acid with other hydroxy-, carboxylic acid-, or hydroxycarboxylic acid-containing moieties, copolymers of lactic acid with other hydroxy-, carboxylic acid-, or hydroxycarboxylic acid-containing moieties, and mixtures thereof. 
     
     
         16 . A method comprising:
 (a) adding to a tool selected from the group consisting of slickline, wireline, coil-tubing, micro-coil tubing, and drill string, a substantially longitudinal body comprising at least in part a degradable material;   (b) deploying the tool through a well;   (c) positioning with the tool the longitudinal body at a downhole location of the well; and   (d) allowing the degradable material to degrade and the chemical to be released.   
     
     
         17 . The method of  claim 16 , wherein the chemical is selected from the group consisting of: polymer cross-linker, a breaker, an acid or an acid precursor, a polyacrylamide and mixtures thereof. 
     
     
         18 . The method of  claim 16 , wherein the degradable material is selected from the group consisting of: lactide, glycolide, polylactic acid, polyglycolic acid, copolymers of polylactic acid and polyglycolic acid, copolymers of glycolic acid with other hydroxy-, carboxylic acid-, or hydroxycarboxylic acid-containing moieties, copolymers of lactic acid with other hydroxy-, carboxylic acid-, or hydroxycarboxylic acid-containing moieties, and mixtures thereof. 
     
     
         19 . The method of  claim 16 , wherein the degradable material is degraded at the downhole location with addition of a release fluid, which is naturally present at downhole location or injected. 
     
     
         20 . The method of  claim 16 , wherein the degradable material is degraded at the downhole location with a trigger. 
     
     
         21 . The method of  claim 20 , wherein the trigger is selected from the group consisting of: temperature, mechanical wave including acoustic wave, and electromagnetic wave (microwave, UV).