US2014224494A1PendingUtilityA1

Solid Chemical Well Treatment

12
Individually held — no corporate assignee on recordPriority: Apr 5, 2012Filed: Apr 5, 2012Published: Aug 14, 2014
Est. expiryApr 5, 2032(~5.7 yrs left)· nominal 20-yr term from priority
Inventors:Melvin B. Smith
E21B 43/267
12
PatentIndex Score
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Cited by
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References
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Claims

Abstract

A solid chemical delivery system for delivering solid well treatment chemicals to an underground formation. The solid chemical is formed by dehydrating a silicate to form anhydrous silicate. Well chemicals are then introduced to the silica and form a tablet or pelletized chemical. The pelletized solid chemical is then delivered to the underground formation through the well bore with a proppant and fracturing fluid. This allows the well treatment chemicals to be released over time.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A method for fracturing a formation accessible through a wellbore, the method comprising:
 providing an anhydrous silicate matrix formed to carry a well treatment chemical within the matrix to form a solid chemical; and   pumping the solid chemical, a proppant, and a fracturing fluid into the wellbore;   wherein the solid chemical is positioned within a fracture created by the fracturing fluid and provides a metered release of the well treatment chemical therefrom,   
     
     
         2 . The method of  claim 1  wherein the anhydrous silicate comprises a silica spheroid. 
     
     
         3 . The method of  claim 1  wherein the anhydrous silicate comprises a silica pellet. 
     
     
         4 . The method of  claim 1  further comprising coating the solid chemical with a resinous material. 
     
     
         5 . The method of  claim 1  wherein the well treatment chemical comprises at least one of the following selected from: scale inhibitors, corrosion inhibitors, paraffin products, H 2 S scavengers, or foamers. 
     
     
         6 . The method of  claim 1  wherein the well treatment chemical comprises at least one of the following selected from: emulsifiers, inhibitors, non-emulsifiers, wetting agents, sludge preventives, retarders, suspension agents, anti-swelling agents, or stimulation additives. 
     
     
         7 . The method of  claim 1  wherein the silicate matrix comprises a porous anhydrous silica spheroid. 
     
     
         8 . A well treatment device comprising:
 an anhydrous silica matrix; and   a well treatment chemical held within the silica matrix to form a solid chemical; wherein the chemical is releasable from the silica matrix within a wellbore.   
     
     
         9 . The device of  claim 8  wherein the well treatment chemical comprises at least one of the following selected from: scale inhibitors, corrosion inhibitors, paraffin products, H 2 S scavengers, or foamers. 
     
     
         10 . The device of  claim 8  wherein the well treatment chemical comprises at least one of the following selected from: emulsifiers, inhibitors, non-emulsifiers, wetting agents, sludge preventives, retarders, suspension agents, anti-swelling agents, or stimulation additives. 
     
     
         11 . The device of  claim 8  wherein the anhydrous silica matrix comprises a silica spheroid. 
     
     
         12 . The device of  claim 8  wherein the anhydrous silica matrix comprises a silica pellet. 
     
     
         13 . The device of  claim 8  further comprising a resinous coating surrounding the anhydrous silica matrix. 
     
     
         14 . A device for delivering a well treatment chemical into a wellbore prepared by a process comprising:
 providing a silicate matrix;   heating the silicate matrix to drive off moisture contained therein to form an anhydrous silicate; and   mixing the anhydrous silicate with a well treatment chemical to absorb the well treatment chemical with the silicate matrix to form a solid chemical.   
     
     
         15 . The device of  claim 14  wherein the anhydrous silicate comprises a silica spheroid. 
     
     
         16 . The device of  claim 14  wherein the anhydrous silicate comprises a silica pellet. 
     
     
         17 . The device of  claim 14  further comprising coating the solid chemical with a resinous material. 
     
     
         18 . The device of  claim 14  wherein the well treatment chemical . comprises at least one of the following selected from: scale inhibitors, corrosion inhibitors, paraffin products, H 2 S scavengers, or foamers. 
     
     
         19 . The device of  claim 14  wherein the well treatment chemical comprises at least one of the following selected from: emulsifiers, inhibitors, non-emulsifiers,  wetting agents, sludge preventives, retarders, suspension agents, anti-swelling agents, or stimulation additives. 
     
     
         20 . The device of  claim 14  wherein the silicate matrix comprises a porous anhydrous silica spheroid.

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