Gel plugs and pigs for pipeline use

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

F - Mech Eng,Light,Heat,Weapons

17

D

F17D 3/08 (2006.01) B08B 9/04 (2006.01) B08B 9/055 (2006.01) E21B 43/38 (2006.01) F16L 55/42 (2006.01)

Patent

CA 2452969

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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