Gel plugs and pigs for pipeline use

Details Gel plugs and pigs for pipeline use Gel plugs and pigs for pipeline use

2007-02-27

2007-02-27

Tucker, Philip C. (Department: 1712)

Earth boring, well treating, and oil field chemistry

Preventing contaminant deposits in petroleum oil conduits

C507S203000, C166S265000, C137S013000

Reexamination Certificate

active

10316256

ABSTRACT:
Coacervate gels having excellent shear viscosities and other properties are made with anionic or cationic polymers, a smaller amount of a surfactant having a charge opposite that of the polymer, and a hydrophobic alcohol. The Zeta Potential of the gel is maintained at an absolute value of at least 20. Optional gel promoting additives include betaines and amine oxides. A preferred gel comprises poly diallyl dimethyl ammonium chloride, a lesser amount of sodium lauryl sulfonate, and lauryl alcohol. The gels are particularly useful forming plugs and pigs for separating fluids in pipes.

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