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US 9,315,712 B2Granted
Viscoelastic surfactants and methods of making and using same
AssigneeHalliburton Energy Services, Inc.
InventorsRyan Van Zanten, Douglas J. Harrison
Life of this patent
Estimating the term…
Abstract
A method of servicing a wellbore comprising placing downhole a composition comprising a surfactant package comprising a cationic surfactant and anionic surfactant, wherein the surfactant package when contacted with an aqueous solution forms a viscosified composition in the presence of less than about 30 wt. % of a hydrotrope.
Claims25
A method of servicing a wellbore comprising:
- placing within the wellbore a composition comprising a surfactant package the surfactant package comprising a cationic surfactant and a non-hydrotropic anionic surfactant, wherein the non-hydrotropic anionic surfactant is selected from the group consisting of sodium oleate, sodium dodecylbenzenesulfonate, sodium decanoate, sodium octyl sulfate, sodium caprylate, sodium stearate, sodium myristate, sodium laurate, sodium cetyl sulfate, sodium myristyl sulfate, sodium laurel sulfate, and sodium decyl sulfate,
- pumping the composition down to a lost circulation zone within the wellbore,
- contacting the composition with an aqueous solution in the lost circulation zone in the substantial absence of hydrotropes at an elevated temperature of from about 10° C. to about 200° C., wherein the substantial absence comprises a presence of less than about 0.1 wt. % of hydrotropes based on a total weight of the surfactant package, and
- forming a viscosified composition in the lost circulation zone that substantially seals the lost circulation zone.
1 more element
A method of servicing a wellbore comprising:
- forming a composition comprising a surfactant package, the surfactant package comprising a cationic surfactant and an anionic surfactant, wherein the cationic surfactant is selected from the group consisting of stearyltrimethylammonium chloride, cetyltrimethylammonium tosylate, octyltrimethylammonium chloride, erucyl bis-(hydroxyethyl)methylammonium chloride, erucyl trimethylammonium chloride cetyltrimethylammonium chloride, cetyltrimethylammonium bromide, myristyltrimethylammonium chloride, myristyltrimethylammonium bromide, dodecyltrimethylammonium chloride, dodecyltrimethylammonium bromide, decyltrimethylammonium chloride, and decyltrimethylammonium bromide, and wherein the anionic surfactant is selected from the group consisting of sodium oleate, sodium dodecylbenzenesulfonate, sodium decanoate, sodium octyl sulfate, sodium caprylate, sodium stearate, sodium myristate, sodium laurate, sodium cetyl sulfate, sodium myristyl sulfate, sodium lauryl sulfate, and sodium decyl sulfate,
- placing the composition within the wellbore,
- pumping the composition to a lost circulation zone within the wellbore,
- contacting the composition with an aqueous solution in the lost circulation zone in the substantial absence of hydrotropes at an elevated temperature of from about 10° C. to about 200° C.,
- wherein the substantial absence comprises a presence of less than about 0.1 wt. % of hydrotropes based on a total weight of the surfactant package, and
- forming a viscosified composition in the lost circulation zone that substantially seals the lost circulation zone.
3 more elements
Dependencies are inferred from the claim text.