Viscoelastic wellbore fluid comprising an anionic surfactant

Details Viscoelastic wellbore fluid comprising an anionic surfactant Viscoelastic wellbore fluid comprising an anionic surfactant

2007-02-15

2009-08-18

Kugel, Timothy J. (Department: 1796)

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

C507S265000, C507S256000

Reexamination Certificate

active

07576043

ABSTRACT:
A wellbore fluid comprising a surfactant, the surfactant having the formula (R1—X)nZ, wherein R1is an aliphatic group—comprising a C18-C22principal straight chain bonded at a terminal carbon atom thereof to X, and comprising at least one C1-C2side chain—X is a charged head group, Z is a counterion, and n is an integer which ensures that the surfactant is charge neutral, and wherein the charged head group X is selected to provide that the surfactant is soluble in oil and at least one part of the charged head group is anionic.

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