US2005124502A1PendingUtilityA1

Compositions for restoring lost circulation

44
Priority: Mar 26, 2002Filed: Jan 18, 2005Published: Jun 9, 2005
Est. expiryMar 26, 2022(expired)· nominal 20-yr term from priority
Inventors:Mano Shaarpour
C09K 8/32C09K 8/22C09K 8/5045C09K 8/16
44
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Claims

Abstract

A method and composition is provided for sealing a subterranean zone penetrated by a well bore to restore lost circulation. In one embodiment, the composition comprises a pellet comprising a mixture of lost circulation materials (LCMs).

Claims

exact text as granted — not AI-modified
1 . A sealing composition comprising: 
 a formation bridging component;    a seepage loss component; and    an oil wetting component.    
     
     
         2 . The composition of  claim 1  wherein the formation bridging component comprises an angular carbon compound.  
     
     
         3 . The composition of  claim 1  wherein the seepage loss component comprises at least one of a fibrous cellulose material and a shredded cellulose material.  
     
     
         4 . The composition of  claim 1  wherein the oil wetting component comprises a lecithin liquid dispersion.  
     
     
         5 . The composition of  claim 1  comprising 40% of an angular carbon compound, 30% of a fibrous cellulose material, 20% of a shredded cellulose material, and 10% of a lecithin liquid dispersion.  
     
     
         6 . The composition of  claim 1  wherein the composition is in compressed form.  
     
     
         7 . The composition of  claim 1  wherein the composition is in solution.  
     
     
         8 . A sealing composition comprising: 
 a formation bridging component;    a seepage loss component;    an oil wetting component; and    modified hydrocarbon.    
     
     
         9 . The composition of  claim 8  further comprising at least one of graphite and calcium carbonate.  
     
     
         10 . The composition of  claim 8  wherein the formation bridging component comprises an angular carbon compound.  
     
     
         11 . The composition of  claim 8  wherein the seepage loss component comprises a fibrous cellulose material.  
     
     
         12 . The composition of  claim 8  wherein the oil wetting component comprises a lecithin liquid dispersion.  
     
     
         13 . The composition of  claim 8  comprising 25% of an angular carbon compound, 29.5% of a fibrous cellulose material, 5% graphite, 10% calcium carbonate, 15% modified hydrocarbon, and 15.5% of a lecithin liquid dispersion.  
     
     
         14 . The composition of  claim 8  wherein the composition is in compressed form.  
     
     
         15 . The composition of  claim 8  wherein the composition is in solution.  
     
     
         16 . A sealing composition comprising: 
 a formation bridging component comprising an angular carbon compound;    a seepage loss component comprising at least one of a fibrous cellulose material and a shredded cellulose material; and    an oil wetting component.    
     
     
         17 . The composition of  claim 16  wherein the oil wetting component comprises a lecithin liquid dispersion.  
     
     
         18 . The composition of  claim 16  further comprising at least one of graphite and calcium carbonate.  
     
     
         19 . The composition of  claim 16  further comprising a modified hydrocarbon.  
     
     
         20 . The composition of  claim 16  wherein the composition is in compressed form.  
     
     
         21 . The composition of  claim 16  wherein the composition is in solution.

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