[12] Patent
[11] Patent No.:GC0009397  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2018                56/2018  
Number of the Decision to Grant the Patent:2018/141821
Date of the Decision to Grant the Patent:18/Dec/2018

[21] Application No.:GC 2014-27747

[22] Filing Date:14/8/2014

[30] Priority:

[33] State [32] Priority date [31] Priority No.
US
19/9/2013
PCT/US13/60551

[72] Inventors:1- RAVI, Krishna،2- LEWIS, Sam،3- AGAPIOU, Kyriacos

[73] Owner: Halliburton Energy Services,Inc., 10200 Bellaire Boulevard, Houston, 77072, Texas , USA

[74] Agent: Saba & Co. T.M.P

  

 

  

[51]IPC:
Int. Cl.: C09K 8/40; E21B 21/08, 33/14 (2006.01)

[56] Cited Documents:

-US 8415279 B2 (BAKER HUGHES INC?[US]) 09 April 2013  
Examiner: Eng. Sattam M.AlMutairi

[54] OIL-IN-WATER STABLE, EMULSIFIED SPACER FLUIDS
[57] Abstract: Some embodiments described herein provide a method comprising method comprising providing an oil-in-water emulsified spacer fluid comprising a binary surfactant mixture, solvent non-aqueous base fluid, and an aqueous base fluid, wherein the binary surfactant mixture comprises a surfactant and an amphiphilic co-surfactant, wherein the surfactant is present in an amount in the range of from about 0.5% to about 30% by weight of the oil-in-water emulsified spacer fluid and wherein the amphiphilic co-surfactant is present in an amount in the range of from about 0.5% to about 30% by weight of the oil-in-water emulsified spacer fluid, and introducing the oil-in-water emulsified spacer fluid into a subterranean formation comprising a residual non-aqueous fluid therein, wherein the binary surfactant mixture in the oil-in-water emulsified spacer fluid emulsifies at least a portion of the residual non-aqueous fluid.
No. of claims: 15     No. of figures: 1


 

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