| Title of Invention | "A FORMULATION" |
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| Abstract | A formulation comprising in an aqueous medium. (a) at least one surfactant comprising n-alkyl triglycol ether in an amount of 1-45% w/w of the total formulation. (b) a solution of a water-soluble metal salt comprising a multivalent cation and (c) a solution of a water-miscible scale-inhibiting compound such as herein described in an amount of a 1-25% w/w of the total formulation and comprising an anionic component capable of forming the scale inhibiting precipitate in situ in the presence of the cations of (b) upon injection into a rock formation matrix, wherein the minimum ion concentration of the scale inhibiting compound (c) in said formulation is at least 5,000 ppm based on the total weight of the formulation. |
| Full Text | DESCRIPTION (COMPLETE) OCR NOT PREPARE DUE TO PRINT PROBLEM WE CLAIMS :- 1. A formulation comprising in an aqueous medium. (a) at least one surfactant comprising n-alkyl triglycol ether in an amount of 1-45% w/w of the total formulation. (b) a solution of a water-soluble metal salt comprising a multivalent cation and (c) a solution of a water-miscible scale-inhibiting compound such as herein described in an amount of a 1-25% w/w of the total formulation and comprising an anionic component capable of forming the scale inhibiting precipitate in situ in the presence of the cations of (b) upon injection into a rock formation matrix, wherein the minimum ion concentration of the scale inhibiting compound (c) in said formulation is at least 5,000 ppm based on the total weight of the formulation. 2. A formulation as claimed in claim 1, wherein the n-alkyl triglycol ether is n-butyltriglycol ether and the by-product stream comprises 75% w/w of n-butyltriglycol ether, 2.5% w/w of butydiglycol ether, 19% of butyl tetraglycol ether and 2% of butyl pentaglycol ether. 3. A formulation as claimed in claim 1, wherein said formulation is a homogeneous solution optionally comprising small amounts of a solubilizing agent to maintain the homogeneity of the solution during storage and transportation thereof. 4. A formulation as claimed in claim 3, wherein the solubilizing agent is a lower aliphatic alcohol which is present in an amount sufficient to maintain the homogeneity of the formulation in solution. 5. A formulation as claimed in claim 2, wherein the solubilising is methanol or ethanol. 6. A formulation as claimed in claim 1, wherein the aqueous medium in the formulation is derived from fresh, tap, river, sea, produced or formation water, with a total salinity ranging from 0-250 g/I. 7. A formulation as claimed in claim 6, wherein the salinity of the aqueous medium is from 5-50 g/I. 8. A formulation as claimed in claim 1, wherein said formulation in aqueous medium has a pH value in the range from 0.5-9. 9. A formulation as claimed in claim 1, wherein the amount of the scale inhibiting compound used is at least 5000 ppm and is in the range from 5-15% w/w of the total formulation. 10. A formulation substantially as herein described with reference to the foregoing examples. |
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8-del-1998-complete specification (as filed).pdf
8-del-1998-complete specification (granted).pdf
8-del-1998-correspondence-others.pdf
8-del-1998-correspondence-po.pdf
8-del-1998-description (complete).pdf
| Patent Number | 253832 | ||||||||
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| Indian Patent Application Number | 8/DEL/1998 | ||||||||
| PG Journal Number | 35/2012 | ||||||||
| Publication Date | 31-Aug-2012 | ||||||||
| Grant Date | 28-Aug-2012 | ||||||||
| Date of Filing | 02-Jan-1998 | ||||||||
| Name of Patentee | BP CHEMICALS LIMITED | ||||||||
| Applicant Address | BRITIANNIC HOUSE, 1 FINSBURY CIRCUS, LONDON, EC2M 7BA, U.K. | ||||||||
Inventors:
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| PCT International Classification Number | C09B67/36 | ||||||||
| PCT International Application Number | N/A | ||||||||
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PCT Conventions:
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