US2003078169A1PendingUtilityA1

Thermal extenders for well fluid applications

35
Priority: Jun 1, 2001Filed: Jul 9, 2001Published: Apr 24, 2003
Est. expiryJun 1, 2021(expired)· nominal 20-yr term from priority
Inventors:David P. KippieWilliam E. FoxenbergRobert L. Horton
C09K 8/62C09K 8/035C09K 8/10
35
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

The present invention relates to methods and compositions for increasing the effective temperature range for viscosified fluids, including particularly fluids that have been viscosified by the addition of a natural or a natural derivative polymer. In one embodiment, the present invention relates to a method for increasing the effective temperature range for a polymer-viscosified fluid used as a well fluid, which includes adding a miscible tertiary, secondary, and/or primary amine compound into a polymer solution. In another embodiment, the present invention relates to a thermally stable well fluid, which includes a polymer, a solvent, and a tertiary, secondary, and/or primaryamine miscible in the solvent.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A method for increasing the thermal stability of a well fluid comprising: 
 mixing an effective amount of a miscible amine in the well fluid, wherein the well fluid comprises a natural polymer.    
     
     
         2 . The method of  claim 1 , wherein the miscible amine comprises an amine selected from the group consisting of primary, secondary and tertiary amines, and mixtures thereof.  
     
     
         3 . The method of  claim 1 , wherein the amine comprises about 0.2% to about 20% by weight of the well fluid.  
     
     
         4 . The method of  claim 3 , wherein the amine comprises about 0.5% to about 10% by weight of the well fluid.  
     
     
         5 . The method of  claim 3 , wherein the natural polymer comprises about 0.1% to about 5% by weight of the well fluid.  
     
     
         6 . The method of  claim 4 , wherein the natural polymer comprises about 0.3% to about 1.5% by weight of the well fluid.  
     
     
         7 . The method of  claim 1 , wherein the natural polymer comprises hydroxyethylcellulose.  
     
     
         8 . The method of  claim 1 , wherein the miscible amine comprises triethanol amine.  
     
     
         9 . A method for increasing the thermal stability of a well fluid comprising: 
 mixing about 0.1% to about 50% by weight of a miscible amine into the well fluid, wherein the well fluid comprises a natural polymer.    
     
     
         10 . The method of  claim 9 , wherein the miscible amine comprises an amine selected from the group consisting of primary, secondary and tertiary amines, and mixtures thereof.  
     
     
         11 . The method of  claim 10 , wherein the amine comprises about 0.2% to about 20% by weight of the well fluid.  
     
     
         12 . The method of  claim 11 , wherein the amine comprises about 0.5% to about 10% by weight of the well fluid.  
     
     
         13 . The method of  claim 11 , wherein the natural polymer comprises about 0.1% to about 5% by weight of the well fluid.  
     
     
         14 . The method of  claim 12 , wherein the natural polymer comprises about 0.3% to about 1.5% by weight of the well fluid.  
     
     
         15 . The method of  claim 9 , wherein the natural polymer comprises hydroxyethylcellulose.  
     
     
         16 . The method of  claim 9 , wherein the miscible amine comprises triethanol amine.  
     
     
         17 . A thermally stable well fluid comprising: 
 a natural polymer; and    an effective amount of miscible amine.    
     
     
         18 . The well fluid of  claim 17 , wherein the miscible amine comprises an amine selected from the group consisting of primary, secondary and tertiary amines, and mixtures thereof.  
     
     
         19 . The well fluid of  claim 18 , wherein the amine comprises about 0.2% to about 20% by weight of the well fluid.  
     
     
         20 . The well fluid of  claim 19 , wherein the amine comprises about 0.5% to about 10% by weight of the well fluid.  
     
     
         21 . The well fluid of  claim 19 , wherein the natural polymer comprises about 0.1% to about 5% by weight of the well fluid.  
     
     
         22 . The well fluid of  claim 20 , wherein the natural polymer comprises about 0.3% to about 1.5% by weight of the well fluid.  
     
     
         23 . The well fluid of  claim 17 , wherein the natural polymer comprises hydroxyethylcellulose.  
     
     
         24 . The well fluid of  claim 17 , wherein the miscible amine comprises triethanol amine.  
     
     
         25 . A method of treating a well comprising: 
 injecting a well treating fluid into the well, wherein the well treating fluid comprises a natural polymer and a miscible amine.    
     
     
         26 . The method of  claim 25 , wherein the miscible amine comprises an amine selected from the group consisting of primary, secondary and tertiary amines and mixtures thereof.  
     
     
         27 . The method of  claim 25 , wherein the natural polymer comprises hydroxyethylcellulose.  
     
     
         28 . The method of  claim 25 , wherein the miscible amine comprises triethanol amine.  
     
     
         29 . The method of  claim 25 , wherein the miscible amine comprises about 0.1% to about 50% by weight of the well treating fluid.  
     
     
         30 . The method of  claim 29 , wherein the miscible amine comprises about 0.2% to about 20% by weight of the well treating fluid.  
     
     
         31 . The method of  claim 29 , wherein the natural polymer comprises about 0.1% to about 5% by weight of the well fluid.  
     
     
         32 . The method of  claim 30 , wherein the natural polymer comprises about 0.3% to about 1.5% by weight of the well fluid.  
     
     
         33 . A method for increasing hydration time and transition temperature in a well fluid comprising: 
 mixing an effective amount of a miscible amine with a natural polymer.    
     
     
         34 . The method of  claim 33 , wherein the miscible amine comprises an amine selected from the group consisting of primary, secondary and tertiary amines and mixtures thereof.  
     
     
         35 . The method of  claim 33 , wherein the natural polymer comprises hydroxyethylcellulose.  
     
     
         36 . The method of  claim 33 , wherein the miscible amine comprises triethanol amine.  
     
     
         37 . The method of  claim 33 , wherein the miscible amine comprises about 0.1% to about 50% by weight of the well fluid.  
     
     
         38 . The method of  claim 37 , wherein the miscible amine comprises about 0.2% to about 20% by weight of the well fluid.

Join the waitlist — get patent alerts

Track US2003078169A1 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.